Bevelback Weatherboard – Technical Manual - Jenkin

Appraisal No. 536 [ 2007 ]
Appraisal No. 537 [ 2007 ]

Bevelback Weatherboard – Technical Manual

From Renewable Wood
BRANZ Appraised
NZBC Compliant

Primed & Undercoated
System Solution

Fast Install & Less Waste
BRANZ Impact Tested

A-lign Tech BW V.11/12

Proven since 1922 jenkin.co.nz

Jenkin A-lign® aligns
natural sustainable
timber to modern
design needs –
combining striking
good looks with
guaranteed high
performance.

Renewable natural pine Once finger-jointed they form products
that exceed the pine’s original physical and
The NZ radiata pine used in the Jenkin structural characteristics by over 400%.
A-lign timber cladding system solution is
from renewable and sustainable plantation This makes it a brilliant natural
resources. ‘environmentally friendly’ construction
choice over alternative building materials
It is a remarkably versatile timber made from non-renewable fossil fuels.
renowned for exceptional machining
properties, durability and lightness.

Branz Impact Test Independently assessed

Impact resistance is a key criteria A BRANZ Appraisal is a comprehensive
for cladding materials being used independent assessment of building
in the construction of schools and products and systems for fitness for
similar light commercial buildings purpose and Building Code compliance.
not exceeding 10 metres in height.
To meet regulatory and specifier The Jenkin A-lign timber cladding
requirements, Jenkin A-lign timber system solution has been vigorously
weatherboard (18mm thick) were assessed from manufacturing processes,
subjected to hard body high through to fitness for purpose, durability,
impact resistance tests performed weather-tightness performance and
by BRANZ. High density fibre structural capability over a drained
cement weatherboard (16mm thick) and vented cavity.
were also included in these tests.
Jenkin A-lign timber weatherboard
performed significantly better than
the fibre cement weatherboard
and, although the level of damage
caused to both was small, the fibre
cement weatherboard had a greater
depth of ball indentation.

Contents

JENKIN A-LIGN COMPONENTS 2 10.0 Fixing Jenkin A-lign bevelback weatherboard 9

10.1 Fixings 9

JENKIN A-LIGN NAILING SCHEDULE 3 10.2 Fixing method 9

10.3 Setting out 9

INTRODUCTION 4 10.4 Fixing procedure for bevelback weatherboard 9

10.5 Joining weatherboard 10

SPECIFICATIONS FOR EXTERIOR CLADDING 5 10.6 External box corners 10

10.7 External mitred corners 10

1.0 Before application of the cladding 5 10.8 Internal corners 10

2.0 Jenkin A-lign bevelback weatherboard 5 11.0 Window and door openings 10
2.1 A-lign bevelback weatherboard sizes 5
2.2 A-lign timber accessories 5 11.1 Aluminium windows 10
2.3 Accessories by Quickflash 5
11.2 Timber windows 10

11.3 Flashings 10

11.4 Jenkin A-lign facings 11

3.0 Detailing 5 11.5 Air seals 11

4.0 Jenkin A-lign on site 5 12.0 Painting Jenkin A-lign 11

4.1 Storage 5 12.1 Materials 11

4.2 Handling 6 12.2 Painting 11

5.0 Wall underlays 6 13.0 General information 11

5.1 Non-rigid underlays 6 13.1 Handling 11

5.2 Rigid underlay installation 6 13.2 Installation 11

5.3 Building wrap installation 6 13.3 Finishing 12

13.4 Moisture 12

6.0 Flashings 7 13.5 Heat generating colours 12

6.1 Supply 7

6.2 Materials 7 14.0 Building maintenance 12

6.3 Fabrication and installation 7 14.1 New construction 12

14.2 Regular washing 12

7.0 Sealants 7 14.3 Maintenance painting 12

7.1 Materials 7

JENKIN TIMBER A-LIGN WARRANTY 13

8.0 Air Seals 8

8.1 Materials 8 DRAWINGS DIRECTORY 14

8.2 Installation 8

SET OUT GUIDES 17

9.0 Drained and vented cavities 8

9.1 Design 8 3-DIMENSIONAL DIAGRAMS 20 – 28

9.2 Materials 8

9.3 Fixing Jenkin A-lign battens 8 CAD DRAWINGS – direct fixed 29 – 51
CAD DRAWINGS – cavity fixed 52 – 77
9.4 Cavity closure 9

JENKIN TIMBER LIMITED – WARRANTY 80

Appraisal No. 536 [ 2007 ] Appraisal No. 537 [ 2007 ]

© JenkinTimber Ltd. 2012 1

Components

H3.1 – Primed and Undercoated

Jenkin A-lign Components* Item # Size Length Profile
A-lign Bevelback Weatherboard 04564 142 x 18mm 6.1 metres
A-lign Bevelback Weatherboard 04643 142 x 18mm 7.2 metres
A-lign Bevelback Base Board 04586 142 x 25mm 6.1 metres

A-lign Bevelback Weatherboard 04565 187 x 18mm 6.1 metres
A-lign Bevelback Weatherboard 04632 187 x 18mm 7.2 metres
A-lign Bevelback Base Board 04589 187 x 25mm 6.1 metres

A-lign Cavity Batten (structural) 04563 45 x 19mm 5.4 metres

A-lign 142 Bevelback Pre-cut Scriber (for 142 x 18) 04568 36 x 18mm 5.4 metres
A-lign 142 B-back Transition Scriber (for 142 x 18) 04701 42 x 36mm 5.4 metres

A-lign 142 B-back Transition Scriber (for 142 x 18) 04702 66 x 18mm 5.4 metres

A-lign 187 Bevelback Pre-cut Scriber (for 187 x 18) 04570 36 x 18mm 5.4 metres
A-lign 187 B-back Transition Scriber (for 187 x 18) 04703 42 x 36mm 5.4 metres

A-lign 187 B-back Transition Scriber (for 187 x 18) 04704 66 x 18mm 5.4 metres

A-lign 142 B-back Int. Scriber (for 142 x 18) 04598 36 x 36mm 5.4 metres
A-lign 187 B-back Int. Scriber (for 187 x 18) 04600 36 x 36mm 5.4 metres

A-lign Weatherhead and Sill Mould 04595 42 x 30mm 5.4 metres

A-lign Bevelback Tilting Fillet (for 142 x 18) 04578 42 x 9.54mm 5.4 metres
A-lign Bevelback Tilting Fillet (for 187 x 18) 04581 42 x 9.58mm 5.4 metres

A-lign Eaves Mould 04576 42 x 18mm 5.4 metres

A-lign Facing (grooved) 04573 42 x 18mm 5.4 metres

A-lign Facing (double grooved) 04603 66 x 18mm 5.4 metres
04606 90 x 18mm 5.4 metres
04609 116 x 18mm 5.4 metres
04612 138 x 18mm 5.4 metres
04615 185 x 18mm 5.4 metres

A-lign Prefabricated Box Corner 04592 102 x 102 5.4 metres
x 18mm


2 © JenkinTimber Ltd. 2012

Nailing schedule

Description Profile Timber Size (mm) Nail Size Specification Clause
A-lign Bevelback 142 x 18 / 187 x 18 75 x 3.15 hot dipped galv* 10.1 and 10.2
Direct Fixed Weatherboard jolt head
142 x 18 / 187 x 18
A-lign Bevelback 75 x 3.15 hot dipped galv* 10.1 and 10.2
Cavity Fixed Weatherboard 45 x 19 jolt head 9.3
A-lign Cavity Batten 60 x 2.80 hot dipped galv*
(structural) or stainless steel ring shank
Jolt head hand driven

64 x 2.80 hot dipped galv* 9.3
gun driven / 65 x 2.87 stainless
steel ring shank gun driven

A-lign Bevelback Pre-cut Scriber 36 x 18 60 x 2.80 hot dipped galv* 10.6
A-lign Bevelback 36 x 36 jolt head 10.8
Internal Corner Scriber 42 x 30 60 x 2.80 hot dipped galv*
A-lign Weatherhead 42 x 9.54/9.58 jolt head 11.4
and Sill Mould 42 x 18 60 x 2.80 hot dipped galv* 10.6
A-lign Tilting Fillets All sizes jolt head 2.3, 6.1 and 9.4
A-lign Eaves Mould 102 x 102 30 x 2.50 hot dipped galv*
All sections flat head/clouts
A-lign Grooved Facing 60 x 2.80 hot dipped galv*
jolt head
A-lign Prefabricated 50 x 2.50 hot dipped galv*
Box Corner jolt head
Quickflash Flashings 50 x 2.50 hot dipped galv*
jolt head
30 x 2.50 hot dipped galv*
flat head/clouts

Note: Hot dip galvanising must meet the requirements of AS/NZS 4680:2006.
* In Corrosion Zone D (refer to NZS 3604 paragraph 4.2.3) all fixings must be type 316 stainless steel.

© JenkinTimber Ltd. 2012 3

Introduction

Note: The 3-Dimensional diagrams and CAD drawings in this
manual are current at the date of this manual (October 2012).
For any amendments or updates to these diagrams or drawings,
please refer to our website: jenkin.co.nz/products/a-lign/cad-details

Scope • Building is situated in NZS 3604 Wind Zones up to
and including Extra High.
The Jenkin A-lign Cladding Solution – Direct Fixed
can be used for the cladding specification of light • Building is situated in specific design wind
commercial and domestic buildings where the: pressures up to a maximum design differential
ultimate limit state (ULS) of 2.5 kPa.
• Building is within the scope limitations of NZBC
Acceptable Solution E2/AS1, Paragraph 1.1. • Cladding solution uses the Jenkin Timber A-lign
accessories and Quickflash flashings given in this
• Risk score is 0-12 calculated in accordance with specification.
NZBC Acceptable Solution E2/AS1, Table 2.
These specifications:
• Building is situated in NZS 3604 Wind Zones up to
and including Very High. • Cover the installation of Jenkin A-lign bevelback
weatherboards as a complete cladding solution
• Cladding solution uses the Jenkin Timber A-lign following the details given in this document and
accessories and Quickflash flashings given in this associated CAD files.
specification.
• Must be made specific to each building project
The Jenkin A-lign Cladding Solution – Cavity Fixed by including only those clauses that apply and
can be used for the cladding specification of light omitting those that do not apply.
commercial and domestic buildings where the:
• A re written as direct instructions to the contractor (it
• Building is within the scope limitations of NZBC does not make use of the words ‘should’ or ‘shall’)
Acceptable Solution E2/AS1, Paragraph 1.1. and this format must be adhered to.

• Risk score is 0-20 calculated in accordance with Note: The success of the cladding solution is partially dependent
NZBC Acceptable Solution E2/AS1, Table 2. on the stability and accuracy of the framing which must meet the
minimum standards set by NZS 3604.

4 © JenkinTimber Ltd. 2012

Specifications for
exterior cladding

1.0 Before application of the cladding. A-lign facing boards – available in 42, 66, 90, 116, 138,
185 x 18mm thickness in 5.4m lengths.
Before beginning installation of the Jenkin A-lign
Timber Cladding Solution ensure that: A-lign bevelback tilting fillets – 42mm wide in
• T he framing complies with the requirements 5.4m lengths.

of NZS 3604 timber framed buildings. A-lign structural cavity batten – 45 x 19mm
• T he framing is straight and within the tolerances in 5.4m lengths.

allowed by Table 2.1 Tolerances of NZS 3604. A-lign bevelled soffit eaves mould – 42 x 18mm
• T he moisture content of the framing timber does in 5.4m lengths.

not exceed 20%. A-lign weatherhead and sill mould – 42 x 30mm
• A dditional studs are included at internal corners in 5.4m lengths.

where there is a cavity. 2.3 Accessories by Quickflash
• T he wall underlay complies with the requirements
Use of Quickflash flashings are an integral part
of Table 23 E2/AS1 and is installed in accordance of the Jenkin A-lign cladding system as defined in
with Section 5.0-5.4 of this specification. the CAD drawings. Select the flashings required.
• W indow and meter box openings are framed out
to give a 7.5mm minimum clearance between the Soakers are not part of the Quickflash range
reveal or window frame and the trimmed opening so should be purchased separately.
(5mm minimum finished clearance when window
installed). 3.0 Detailing

2.0 Jenkin A-lign weatherboard Jenkin A-lign bevelback weatherboard CAD details
2.1 Bevelback weatherboard sizes and computer generated 3-Dimensional construction
diagrams are contained in this document.
• 142 x 18mm
• 187 x 18mm 4.0 Jenkin A-lign on site
Lengths 6.1m and 7.2m
Arrange for delivery of Jenkin A-lign timber
Bevelback base board sizes weatherboards just prior to being required.

• 142 x 25mm 4.1 Storage
• 187 x 25mm
Lengths 6.1m (7.2m by arrangement) Note: Correct storage of weatherboards on site is critical.

2.2 Jenkin A-lign timber accessories Jenkin A-lign weatherboards, structural cavity
battens and accessories have been machined to
Note: Jenkin A-lign accessories are finger-jointed, treated to fine engineered tolerances from finger-jointed clear
H3.1 and primed and undercoated. The A-lign cavity batten is wood base material with an equilibrium moisture
treated but not painted. content of 11% plus or minus 2%. If Jenkin A-lign
weatherboards, structural cavity battens and
A-lign prefabricated 102 x 102mm box corner in accessories are exposed to moisture before installing,
5.4m lengths. as wood is hygroscopic and primers do not prevent
moisture uptake, some dimensional swelling will
A-lign pre-cut 36 x 18 mm scriber with pencil edge occur and the ease of the system installation will
in 5.4m lengths. be impaired. Correct storage of the weatherboards,
battens and accessories is critical for ease of
A-lign pre-cut 36 x 36mm internal corner scriber installation.
pencil edge in 5.4m lengths.
© JenkinTimber Ltd. 2012 5
A-lign pre-cut 42 x 36mm and 66 x 18mm
transition scribers with pencil edge in 5.4m lengths.

Specifications for
exterior cladding

4.2 Handling For buildings with other than flush-stopped sheet
internal linings or areas of unlined wall, the wall
Do not tip the weatherboards from a truck. underlay must meet the air-tightness requirement
Either use a mechanical lifting device or unload of E2/AS1 Table 23.
the weatherboards by hand.
Openings for windows, doors and meter boxes must
Do not drag weatherboards across the ground. have the opening trimmed with flexible flashing tape
compatible with the wall underlay, as required by
Always carry individual weatherboards with their details in E2/AS1.
long section vertical to avoid excessive bending.
5.2 Rigid underlay installation
5.0 Wall underlays
Note: Specify the rigid sheathing or rigid air barrier material
Note: A wall underlay is any material placed on the framing and to be used.
behind the cladding to act as a second line of weathering defence.
Support all rigid sheet edges with framing.
Note: The selected wall underlay must have a serviceable life of at
least 50 years. Fix in accordance with the sheet manufacturers
instructions.
Wall underlays include flexible materials, such as
Kraft based papers or synthetic underlays, and rigid Use hot-dip galvanised fixings, except for bracing and
sheathings such as plywood or fibre cement board. sea spray zones where stainless steel fixings must be
used.
Wall underlays suitable for use with the Jenkin A-lign
Timber Cladding Solution are those meeting the Fit PVC or butyl ‘Z’ flashings along all horizontal joints
requirements of Table 23 of E2/AS1. of the rigid sheathing.

Flexible wall underlays are suitable for us in NZS Fix rigid sheathing in place with sufficient fixings to
3604 Wind Zones up to and including Very High. Rigid resist wind loading (the sheathing will be finally held
underlays are required in the Extra High Wind Zone in place by the cladding fixings).
and specific design wind pressures within the scope
of this specification. 5.3 Flexible Underlay installation

5.1 Flexible underlays Note: Select to suit the underlays.

Note: Specify the actual name/insert specific manufacturer/product Lay the Kraft-based building paper or synthetic
of underlay you wish to have installed and select the specific underlay horizontally across the framing members
installation instructions. with a minimum 150mm overlap at all joints.

A wall underlay complying with the requirements Run material continuously around internal and
of E2/AS1 Table 23 must be installed to the outer external corners – do not join material at corners.
face of the wall framing.
Install taut and ensure that there are no creases in
Select one option from the following: the building paper.
• F ire retardant Kraft paper (insert specific
Fix with clips or staples and tape in accordance with
manufacturer/product). the underlay manufacturer’s instructions.

• H eavyweight bitumen soaked Kraft paper Turn wall underlay into the framing all round windows,
(insert specific manufacturer/product). doors and meter box openings and tape the ‘V’ cut
corners and the full width of the sill trimmer with
• A bsorbent synthetic wall underlay compatible flexible flashing tape.
(insert specific manufacturer/product).
Cover the wall from bottom to top plate.
• N on-absorbent synthetic wall underlay
(insert specific manufacturer/product).

6 © JenkinTimber Ltd. 2012

Repair all holes or tears in the building paper before 6.3 Fabrication and installation
commencing cladding installation. Ensure the building
paper has not been exposed to the weather for more Flashings must be machine bent accurately to the
than the time allowed by the wrap manufacturer. detailed profile.

For installation under cavity battens install vertical Where necessary, site-cut each flashing to suit each
or horizontal strips of plastic tape at 300mm centres circumstance and form stop-ends where appropriate.
and staple to the framing to prevent bulging where Fix flashings using compatible fixings and ensure that
batten spacing exceeds 450mm centres. the building wrap is installed as shown in the Jenkin
A-lign CAD details.
6.0 Flashings
Isolate zinc/aluminium alloy coated steel, galvanised
Note: Flashings as noted on the construction details must steel and uncoated aluminium flashings from timber
be provided and may be made from either sheet steel with a treated with copper-based treatments with a layer
galvanized or zinc/aluminium alloy coating, aluminium or from of kraft paper wall underlay.
stainless steel. They may be factory pre-finished if required.
Refer to NZS 3604 section 4 or E2/AS1 Table 20 for durability 7.0 Sealants
requirements.
Note: Sealants are used to assist with weathering at joints
6.1 Supply and laps. Sealants must not be relied on for primary weather
protection.
Flashings for use with the Jenkin A-lign Timber
Cladding Solution are those manufactured by 7.1 Materials
Quickflash as detailed in the CAD drawings.
Sealant suitable for use with the Jenkin A-lign Timber
Where the Jenkin A-lign cladding abuts a different Cladding Solution is a (specify brand/manufacturer)
cladding use flashings as shown in the Jenkin A-lign sealant complying with E2/AS1 or a sealant covered
CAD details. by a valid BRANZ Appraisal used in accordance with
the manufacturer’s instructions.
Aluminium window head flashings are the
responsibility of the window supplier. 8.0 Air seals

6.2 Materials Note: Air seals are an essential element of the air barrier component
of the cladding solution. They complete the air barrier by sealing
Note: Select the appropriate material for the environment. between the building underlay and the door and window reveals
and meter boxes. The air seal is formed by applying sealant over a
Select the flashing material from: backing rod to which the sealant will not bond or by using self-
• 0.55 BMT galvanised sheet steel. expanding polyurethene foam over a backing rod.
• 0.55 BMT zinc/aluminium alloy coated.
• 0.55 BMT galvanised sheet steel factory coated. 8.1 Materials
• 0.55 BMT zinc/aluminium alloy coated factory
Backing rod: closed cell PEF rod of a diameter
coated. to suit the gap.
• 316 grade stainless steel.
• 0 .9mm powder-coated aluminium for window Air seal: acrylic latex or modified silicon sealant
complying with ISO 11600 used in accordance with
head flashings – window head flashing by the manufacturer’s instructions or low expansion self-
window supplier. expanding polyurethane foam in accordance with the
requirements of E2/AS1.

© JenkinTimber Ltd. 2012 7

Specifications for
exterior cladding

8.2 Installation Cavity batten
up side of
Insert the backing rod into the gap between the window opening
window reveal/meterbox and the trim framing to the
perimeter of the opening. Press in approximately 15mm. Cavity batten
under window
Apply the sealant/expanding foam. opening to be
positioned at
Trim off excess material. least 100mm
inside line
9.0 Drained and vented cavities of opening.

Note: For designs following E2/AS1 a drained and vented 100mm 100mm
cavity is required behind bevelback weatherboards when the
weathertightness risk score for that building face exceeds 12. • W here penetrations of the wall cladding (other than
The cavity is formed by fixing Jenkin A-lign treated battens over windows) are wider than the cavity batten spacing,
the studs. Jenkin A-lign cavity battens are to be structurally fixed in allowance must be made for air flow between
accordance with BRANZ Bulletin 475. Vermin proofing, which allows adjacent cavities by leaving a minimum 10mm gap
draining and ventilation, must be fitted to the bottom of the cavity. between the bottom of the vertical cavity batten
and the flashing to the opening.
9.1 Design
• W ith no continuous horizontal battens below
The cavity must be open to the exterior at the bottom windows.
of every second storey and across the tops of windows,
doors and other penetrations such as meter boxes. • V ertical battens continuous past the ends
Fit Quickflash cavity closures to prevent vermin entry. of head flashings.

9.2 Materials • F ix A-lign structural cavity battens over wall underlay
to studs with 60 x 2.80 hot dipped galvanised or
Structural battens: Jenkin A-lign structural cavity stainless steel ring shank jolt head hand driven.
battens – 45 x 19mm are treated to H3.1. 64 x 2.80 hot dipped galvanised gun driven/65 x
2.87 stainless steel ring shank gun driven at 300mm
Cavity closure: zinc/aluminium alloy coated steel, centres. Stagger fixings 12mm either side of the
aluminium or stainless steel supplied by Quickflash batten centre line.
with a minimum ventilation area of 1000mm2 per
lineal metre of wall.

9.3 Fixing Jenkin A-lign battens

Note: Refers to the fixing of Jenkin A-lign structural cavity battens,
over wall underlay, to the wall studs. This allows the A-lign
bevelback weatherboard to be fixed directly to the cavity battens
eliminating the need for larger fixings (refer 10.1 fixings).

Fix batten as follows:
• Over framing members.

• W ith a gap between battens at corners and below
windows. Note that battens must be kept at least
100mm away from the line of the trimmed opening
below windows.

8 © JenkinTimber Ltd. 2012

9.4 Cavity closure 10.3 Setting out

Fit continuous Quickflash cavity closure trim to the Note: Movement across the width of Jenkin A-lign bevelback
bottom of all cavities, including across the tops of weatherboards is not restricted by board rebates.
openings to prevent vermin entry. Fix with 30 x 2.50mm
galvanized flat head nails/clouts at 400mm centres. Minimum lap for bevelback weatherboards: 32mm.
Use A-lign pre-cut scriber as a storey-rod to locate
10.0 Fixing Jenkin A-lign bevelback the position of each successive board to ensure that
weatherboard scribers will fit accurately to weatherboards.
Keep dry for consistent measurement accuracy.
Note: Select the appropriate fixings for the installation – whether
direct fix or over Jenkin A-lign structural cavity battens. 10.4 Fixing procedure for bevelback
weatherboards
Note: In Corrosion Zone D (refer to NZS 3604 paragraph 4.2.3) all
fixings must be type 316 stainless steel. Hot-dip galvanising must Establish the position of the bottom weatherboard
meet the requirements of AS/NZS 4680:2006. or base board to give a minimum overlap of 50mm
below the bottom plate or bearer.
10.1 Fixings
Use either a standard A-lign bevelback weatherboard
A-lign bevelback weatherboards fixed directly to wall with an A-lign tilting fillet fixed to give the correct
studs: 75 x 3.15mm hot dipped galvanised or stainless angle to the bottom board or the thick profile A-lign
steel ring shank jolt head nails. bevelback base board. The tilting fillet is not required
with this option.
A-lign bevelback weatherboards fixed to A-lign
structural cavity batten: 75 x 3.15mm hot dipped Fix the A-lign bevelback base board in place.
galvanised or stainless steel ring shank jolt head nails.
Cut the final board to fit to the soffit.
Note: Nails must penetrate structural framing by a minimum of
35mm. Where structural battens are used the batten is part of the 10.5 Joining weatherboard
minimum 35mm penetration.
Fix weatherboards in full wall lengths where possible.
10.2 Fixing method
Make joints where unavoidable over studs or battens.
Note: Hand nailing is recommended by Jenkin. Some gun driven Scarf the joint at 45o and use one fixing through the
fixings may bruise the surface. If the builder asks to use them it overlapping board.
is important that they be tested to make sure that they do not
damage the finished surface. A check should also be made as to Prime the cut-ends of scarf joints with Jenkin End Seal
the adequacy of the galvanised coating. aerosol primer, or with two coats of premium timber
primer before fixing. Allow to dry between coats.
Note: It is important to use only one fixing per board per stud
to allow for movement. Cover the joint with a flat soaker.

Fix each board with one nail per board at every stud 10.6 External box corners
or batten, locate fixing 42mm above the bottom
edge of the overlap board to allow for expansion and Fit A-lign prefabricated 102 x 102 x 18mm external
contraction. box corner with a minimum of 50mm cover over
the weatherboards and fix with two, 50 x 2.50mm
Start fixing weatherboards near the middle of the galvanised jolt head nails.
board and work outwards to the ends.
• 440mm centres for 142mm weatherboards (4 laps).
Pre-drill for fixings if within 50mm of the end of
the board. • 465mm centres for 187mm weatherboards (3 laps).

Fit an A-lign pre-cut 18mm scriber over the
weatherboards, tight against the box corner and fix
through pre-drilled holes with 60 x 2.80mm galvanised
jolt head nails at 400mm centres.

© JenkinTimber Ltd. 2012 9

Specifications for
exterior cladding

10.7 External mitred corners • Have window trimmed openings constructed
as shown in E2/AS1 with flexible flashing tapes
Prime the cut-ends of scarf joints with Jenkin End Seal and air seals.
aerosol primer, or with two coats of premium timber
primer before fixing. Allow to dry between coats. 11.2Timber windows

Install either (select one): Note: Timber windows within a weatherboard cladding is not
• A 65 x 65mm Quickflash hemmed angle back covered by E2/AS1 and must be consented by a BCA as an
Alternative Solution.
flashing as detailed directly over the wrap.
Timber windows installed into a Jenkin A-lign
• Soakers. Timber Cladding Solution must:
• Have profiles in accordance with NZS 3610.
Join the weatherboards with a tightly fitting • Incorporate facings and scribers.
45˚ mitre joint. • Incorporate full width sill tray flashings.
• Have window trimmed openings constructed
10.8 Internal corners
as shown in E2/AS1 with flexible flashing tapes
Install a 65mm x 65mm Quickflash hemmed angle and air seals.
back flashing over the wrap.
11.3 Flashings
Scribe and notch alternate weatherboards or use
the A-lign pre-cut 36 x 36mm internal corner double Flashing material and fabrication in accordance
scriber. with section 6.0 of this specification. Stop-ends
to finish at back of cladding.
Prime the cut-ends of scarf joints with Jenkin End Seal
aerosol primer, or with two coats of premium timber Head flashings must have:
primer before fixing. Allow to dry between coats. • 10mm stop-ends when used with a 20mm cavity.
• 15o cross fall.
11.0 Window and door openings • 10mm min cover to the window flange.
• 50mm min back upstand to give 35mm min
Note: The integrity of the junctions at the interface of the
cladding and the window and door openings is a vital part of the cladding cover. (Refer to E2/ASI Table 7)
weatherproofing system. Care must be taken to ensure that the
work is carried out correctly and that all flashings, weatherings and Fit sill flashing as detailed with stop-ends to all windows.
air seals are in place.
Sill flashings must have:
Note: This specification applies to the use of aluminium windows • A 5o cross fall.
and doors that are in accordance with E2/AS1 paragraph 9.1.10.
Use of bi-fold, sliding or other non-hinged windows and doors • 35mm cladding cover at front downturn.
and timber windows and doors must be submitted to the Building
Consent Authority as an Alternative Solution to NZBC Clause E2/AS1. • 20mm stop-ends.

11.1 Aluminium windows • A 5mm turn up to the back edge.

Aluminium windows installed into a Jenkin A-lign 11.4 Jenkin A-lign facings
Timber Cladding Solution must:
• Comply with NZS 4211 for the building location. Fit A-lign grooved facings with a minimum of 50mm
• H ave a minimum 10mm flange covering the cover over the weatherboards and fix with two, 50 x
2.50mm hot dipped galvanised jolt head nails.
weatherboard trim.
• Incorporate scribers to the flange. Locate the fixings above the lap of the
• Include a full width sill tray for direct fixed. Cavity weatherboard at:
• 440mm centres for 142mm weatherboards (4 laps).
fix requires window support bars for trim opening
wider than 600mm. Refer to E2/AS1 – 9.1.10.5. • 465mm centres for 187mm weatherboards (3 laps).

10 © JenkinTimber Ltd. 2012

Fit A-lign pre-cut 18mm scriber over the 13.0 General information
weatherboards, tight against the facing and fix
through pre-drilled holes with 60 x 2.80mm hot dipped 13.1 Handling
galvanised jolt head nails at centres as above.
Store the product where it is dry and kept off
11.5 Air seals the ground using bearers. If stored outside use a
secondary waterproof cover but allow for good air
On completion fit air seals around all window and circulation. When handling, take care to avoid any
door openings as specified. damage to surfaces.

12.0 Painting Jenkin A-lign 13.2 Installation

12.1 Materials Avoid scratching or marking of the board during
installation and cutting. Prime the cut-ends of scarf
A premium factory applied primer and undercoat has joints with Jenkin End Seal aerosol primer, or with
been applied in two separate coats. Site prime all two coats of premium timber primer before fixing.
bare timber surfaces and cut-ends with Jenkin A-lign Allow to dry between coats.
End Seal aerosol primer before fixing. Allow to dry
between coats. 13.3 Finishing

Finishing coats: 100% premium acrylic house paint Remove all loose material, dirt etc. Spot prime
(insert specific manufacturers product) as specified in exposed bare timber with selected premium timber
Parts 7, 8, 9 and 10 of AS 3730. primer, putty all nail holes, use a filler and sealants
nominated as exterior type suitable for overcoating
12.2 Painting with 100% acrylic paint. Apply two coats of 100%
premium acrylic house paint as per instructions on
Note: Resin bleed may occur from timber in hot conditions the container.
or where painted in dark colours. Adherence to the above
specification will help minimise the problem. 13.4 Moisture

Note: Primers cannot withstand exposure to weather for Tannin extracts (dark stains in the film) are a result
extended periods. of the board being allowed to get wet. This is neither
a board nor paint issue as it is a result of excessive
Note: Using light colours lessens the chance of distortion moisture, which infiltrates the board through not
by reducing solar heat build up in the weatherboards. following these guidelines. After installation of the
board it is recommended that the painter be allowed
Carry out all painting work in accordance with the to complete the finishing work as soon as practical.
appropriate clauses of AS/NZS 2311 Guide to Painting Refer to 12.2 Painting.
of Buildings.
13.5 Heat generating colours
Finishing coats to be applied after installation of the
exterior sheathing, joinery and trim. Dark colours absorb heat from the sun. Light colours
reflect significantly more heat. Testing has shown that
Prior to applying finishing coats ensure no moisture dark colours can generate temperatures in excess of
related dimensional swelling is evident by measuring 85°C in direct sunlight whereas light colours under
profiles against original profile sizes. If swelling is the same conditions can be as much as 35°C cooler.
present, delay finish coating until the timber profiles It is recommended that the chosen colour therefore
have returned to their original machined sizes. has a Light Reflective Value greater than 45 (LRV of
white is 95/100, LRV Black is 0).
Fill all nail holes with an exterior grade filler, sand
to a smooth surface and spot-prime filled areas and
wherever the coating is damaged.

Apply two full coats of 100% premium acrylic house
paint with a gloss level of 10% and a Light Reflective
Value of 45% or greater (ASTM C1549 or ASTM E903).

© JenkinTimber Ltd. 2012 11

Specifications for
exterior cladding

14.0 Building maintenance As part of your maintenance, always check flashings,
sealant and fastenings to ensure they do not permit
14.1 New construction the passage of water into the substrate. Left
unchecked, water entry into the substrate can cause
Building movement and settlement is inevitable. Paint substantial damage which can become expensive to
coatings are affected by this occurrence whether it remedy.
be concrete or timber substrate. It is important to Follow these instructions to ensure that your
deal immediately with new issues that are as a result investment in Jenkin A-lign natural solid timber
of substrate movement – in the case of timber it is products will stand the test of time.
movement of the board. Make good these areas
by priming and then touching up with the original, For more information on Jenkin A-lign call the
topcoat paint. Jenkin Helpline on:

14.2 Regular washing 0800 25 44 61

Exterior building surfaces benefit from being cleaned Monday to Friday 8am–5pm
regularly. This is particularly important under eaves
and overhangs. Mould, fungi and marine salts can For more technical information and
have a detrimental effect on the paint coating and downloadable CAD and 3-D drawings, visit:
the substrate if left. Arrange to lightly wash all
surfaces at least annually. This is particularly jenkin.co.nz
important in a marine environment.

14.3 Maintenance painting

When required use a premium primer and undercoat,
followed by the topcoat originally selected. In some
circumstances where maintenance is delayed for
many months it may be required to make good the
repair area and then fully coat the whole section
because of the change in the appearance of the
coatings. Loss of gloss, colour change etc. is
normal for paint.

Mostly walls facing north will be subject to this
requirement, particularly if maintenance is delayed.

It is however, beneficial for both the paint film and
the substrate to apply another coat. This maintenance
should be viewed as a positive outcome for both
the paint, the substrate and your investment in the
home/building.

Building movement normally reduces over time.
Experience has shown that areas that have been
subject to maintenance in the main do not require
further repairs providing the substrate is not
subjected to continual movement.

12 © JenkinTimber Ltd. 2012

Jenkin Timber A-lign Warranty

Warranty (e) The building works in which The Product has been
incorporated must be designed and constructed in strict
Jenkin Timber Limited (‘Jenkin Timber’) warrants for a period compliance with all relevant provisions of the current New
of 15 years from the date of purchase that it’s A-lign cladding Zealand Building Code (‘NZBC’), regulations and standards,
and A-lign accessories (The ‘Products’), will be free from and the Building Consent relating to the building works.
production defects, and subject to compliance with the
conditions below, will be resistant to cracking, rotting, and (f) The customer’s sole remedy under this warranty is (at
damage from borer attacks to the extent set out in Jenkin Jenkin Timber Ltd’s option) that Jenkin Timber Ltd will either
Timber Ltd’s product literature current at the time supply replacement Products, rectify the affected Products
of installation. or pay for the cost of the replacement or rectification of the
affected Products.
The Jenkin A-lign Technical Manual sets out the approved and
recommended methods for cladding installation. A copy of (g) Jenkin Timber Ltd will not be liable for any losses or
the Jenkin A-lign Technical Manual is available from Jenkin damages (whether direct or indirect) including property
Timber Ltd, phone toll free on: 0800 25 44 61 Monday damage, personal injury, consequential loss, economic
to Friday 8am–5pm. loss or loss of profits, arising in contract or negligence or
howsoever arising. Without limiting the foregoing Jenkin
Conditions of Warranty Timber Ltd will not be liable for any claims, damages or
defects arising from or in any way attributable to poor
The warranty is strictly subject to the following workmanship, poor design or detailing, settlement or
conditions: structural movement and/or movement of materials to which
(a) The Products must be installed by a competent and The Products are attached, incorrect design off the structure,
qualified builder, strictly in accordance with the Jenkin acts of God including but not limited to earthquakes,
A-lign Technical Manual current at the time of installation, cyclones, floods or other severe weather conditions or
utilising Jenkin A-lign components or products specified unusual climatic conditions, efflorescence or performance of
in the Jenkin A-lign Technical Manual. Where the Jenkin paint/coatings applied to The Products, normal wear and tear,
A-lign Technical Manual does not provide a suitable detail growth of mould, mildew, fungi, bacteria, or any organism
for installation of The Products then installation must be on the surface of any Products (whether on the exposed or
in accordance with best trade practice determined in unexposed surfaces).
consultation with the Territorial Authority and designer of the
building works. Further, all other products, including coating (h) All warranties, conditions, liabilities and obligations
and jointing systems, applied to or used in conjunction with other than those specified in this warranty are excluded
The Products must be applied or installed strictly in to the fullest extent permitted by law. This warranty does
accordance with the relevant manufacturer’s instructions not exclude or modify any legal rights a customer may
and best trade practice. have under the Consumer Guarantees Act 1993. Unless
otherwise specified in writing at the time of sale, Jenkin
(b) Jenkin Timber Ltd will not be liable under this warranty Timber Ltd assumes no liability for The Products being fit for
unless a written claim is notified to Jenkin Timber Ltd within any particular purpose under the Building Act 2004, other
30 days of the defect becoming reasonably apparent. legislation or at common law.

(c) This warranty is for the benefit of the original owner (i) If any remedial work undertaken under this warranty
of the building where the Jenkin A-lign cladding has been involves re-coating of The Products, the customer
installed. This warranty is not transferable to subsequent acknowledges and agrees that there may be slight colour
owners of the building. differences between the original and replacement Products
due to the effects of weathering and variations in materials
(d) The Products must be maintained strictly in accordance over time.
with the Jenkin A-lign Technical Manual. Further, all
other products, including coating and jointing systems,
applied to or used in conjunction with The Products must
be maintained strictly in accordance with the relevant
manufacturer’s instructions and best trade practice.

© JenkinTimber Ltd. 2012 13

Drawings Directory

Set out guides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Preparing a trimmed opening . . . . . . . . . . . . . . . . . . . . . . . . . 20
Direct and cavity fixed – fixing guide . . . . . . . . . . . . . . . . . . . 20

Direct fixed bevelback drawings. . . . . . . . . . . . . . . . . . . . 3-D CAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-D CAD
Figure 1.01 base of wall – concrete floor. . . . . . . . . . . . 21 30 Figure 1.21 external corner –
Figure 1.02 base of wall – timber floor. . . . . . . . . . . . . . 21 30
Figure 1.03 eaves – angled soffit. . . . . . . . . . . . . . . . . . . . . . 31 prefabricated box – profiled metal. . . . . . . . . . 42
Figure 1.04 eaves – flat soffit. . . . . . . . . . . . . . . . . . . . . . 21 31 Figure 1.22 internal corner –
Figure 1.05 eaves – no soffit . . . . . . . . . . . . . . . . . . . . . . 21 32
Figure 1.07 external corner – prefabricated box. . . . . . 21 32 pre-cut scriber – profiled metal. . . . . . . . . . . . . 43
Figure 1.08 external corner – mitred . . . . . . . . . . . . . . . 22 33 Figure 1.23 above profiled metal . . . . . . . . . . . . . . . . . . . . . 43
Figure 1.09 internal corner – pre-cut scriber. . . . . . . . . 22 33 Figure 1.24 below profiled metal . . . . . . . . . . . . . . . . . . . . . 44
Figure 1.10 internal corner – scribed . . . . . . . . . . . . . . . 22 34 Figure 1.25 abutting profiled metal . . . . . . . . . . . . . . . . . . . 44
Figure 1.11 aluminium window – head. . . . . . . . . . . . . 22 34-36 Figure 1.26 external corner – masonry veneer. . . . . . . . . . 45
Figure 1.12 aluminium window – jamb. . . . . . . . . . . . . 22 37 Figure 1.27 internal corner – masonry veneer . . . . . . . . . . 45
Figure 1.13 aluminium window – sill. . . . . . . . . . . . . . . 22 38 Figure 1.28 above masonry veneer . . . . . . . . . . . . . . . . . . . 46
Figure 1.14 timber window – head. . . . . . . . . . . . . . . . . 23 39 Figure 1.29 abutting masonry veneer . . . . . . . . . . . . . . . . . 46
Figure 1.15 timber window – jamb. . . . . . . . . . . . . . . . . 23 39 Figure 1.30 pipe penetration. . . . . . . . . . . . . . . . . . . . . . 24 47
Figure 1.16 timber window – sill. . . . . . . . . . . . . . . . . . . 23 40 Figure 1.31 above waterproof deck . . . . . . . . . . . . . . . . 24 47
Figure 1.17 meter box – head. . . . . . . . . . . . . . . . . . . . . 23 40 Figure 1.32 reverse raked soffit. . . . . . . . . . . . . . . . . . . . . . . 48
Figure 1.18 external corner – Figure 1.33 apron flashing. . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 1.34 apron flashing – stop end. . . . . . . . . . . . . . 24 49
prefabricated box – stucco . . . . . . . . . . . . . . . . 41 Figure 1.38 internal corner – 135 degrees – scribed. . . . . . 49
Figure 1.19 internal corner – Figure 1.39 internal corner – 135 degrees – flashed. . . . . . 50
Figure 1.40 external corner – 135 degrees – mitred. . . . . . 50
pre-cut scriber – stucco. . . . . . . . . . . . . . . . . . . 41 Figure 1.41 nailing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 1.20 above stucco. . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

14 © JenkinTimber Ltd. 2012

Cavity fixed bevelback drawings. . . . . . . . . . . . . . . . . . . . 3-D CAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-D CAD
Figure 2.01 base of wall – concrete floor. . . . . . . . . . . . 24 53 Figure 2.21 external corner –
Figure 2.02 base of wall – timber floor. . . . . . . . . . . . . . . . . 53
Figure 2.03 eaves – angled soffit. . . . . . . . . . . . . . . . . . . . . . 54 prefabricated box – profiled metal. . . . . . . . . . 66
Figure 2.04 eaves – flat soffit. . . . . . . . . . . . . . . . . . . . . . 24 54 Figure 2.22 internal corner –
Figure 2.05 eaves – no soffit . . . . . . . . . . . . . . . . . . . . . . 25 55
Figure 2.06 parapet – cap. . . . . . . . . . . . . . . . . . . . . . . . . 25 55 pre-cut scriber – profiled metal. . . . . . . . . . . . . 67
Figure 2.07 external corner – prefabricated box. . . . . . 25 56 Figure 2.23 above profiled metal . . . . . . . . . . . . . . . . . . . . . 67
Figure 2.08 external corner – mitred . . . . . . . . . . . . . . . 25 56 Figure 2.24 below profiled metal . . . . . . . . . . . . . . . . . . . . . 68
Figure 2.09 internal corner – pre-cut scriber. . . . . . . . . 25 57 Figure 2.25 abutting profiled metal . . . . . . . . . . . . . . . . . . . 68
Figure 2.10 internal corner – scribed . . . . . . . . . . . . . . . 25 57 Figure 2.26 external corner – masonry veneer. . . . . . . . . . 69
Figure 2.11 aluminium window – head. . . . . . . . . . . . . 26 58-60 Figure 2.27 internal corner – masonry veneer . . . . . . . . . . 69
Figure 2.12 aluminium window – jamb. . . . . . . . . . . . . 26 61 Figure 2.28 above masonry veneer . . . . . . . . . . . . . . . . . . . 70
Figure 2.13 aluminium window – sill. . . . . . . . . . . . . . . 26 62 Figure 2.29 abutting masonry veneer . . . . . . . . . . . . . . . . . 70
Figure 2.14 timber window – head. . . . . . . . . . . . . . . . . 26 63 Figure 2.30 pipe penetration. . . . . . . . . . . . . . . . . . . . . . 27 71
Figure 2.15 timber window – jamb. . . . . . . . . . . . . . . . . 26 63 Figure 2.31 above waterproof deck . . . . . . . . . . . . . . . . 27 71
Figure 2.16 timber window – sill. . . . . . . . . . . . . . . . . . . 27 64 Figure 2.32 reverse raked soffit. . . . . . . . . . . . . . . . . . . . . . . 72
Figure 2.17 meter box – head. . . . . . . . . . . . . . . . . . . . . 27 64 Figure 2.33 apron flashing. . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 2.18 external corner – Figure 2.34 apron flashing – stop end. . . . . . . . . . . . . . 28 73
Figure 2.35 parapet – balustrade – wall junction . . . . . . . . 73
prefabricated box – stucco . . . . . . . . . . . . . . . . 65 Figure 2.36 parapet – balustrade – saddle flashing. . . 28 74
Figure 2.19 internal corner – Figure 2.37 parapet – balustrade – saddle install. . . . . . . . 74
Figure 2.38 horizontal cavity joint. . . . . . . . . . . . . . . . . . 28 75
pre-cut scriber – stucco. . . . . . . . . . . . . . . . . . . 66 Figure 2.39 internal corner – 135 degrees – scribed. . . . . . 75
Figure 2.20 above stucco. . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Figure 2.40 internal corner – 135 degrees – flashed. . . . . . 76
Figure 2.41 external corner – 135 degrees – mitred. . . . . . 76
Figure 2.42 nailing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Please note: All drawings are available
as downloadable files from our website:

jenkin.co.nz

© JenkinTimber Ltd. 2012 15

16 © JenkinTimber Ltd. 2012

Set out Guide

18mm 3679 [3679.33] 18mm Min. lap 32mm 3590 [3589.71]
3568 [3567.87] 3434 [3433.67]
Min. lap 32mmmm110mmmm coverJenkin A-lign® 142 bevelback3456 [3456.40]187mmJenkin A-lign® 187 bevelback155mm cover3278 [3277.62]
142mm weatherboard 3345 [3344.94] weatherboard 3122 [3121.58]
3233 [3233.48] 2966 [2965.54]
Wall 3122 [3122.01] Wall 2809 [2809.50]
Concrete floor slab 3011 [3010.55] Concrete floor slab 2653 [2653.46]
2899 [2899.09] 2497 [2497.42]
2788 [2787.62] 2341 [2341.37]
2676 [2676.16] 2185 [2185.33]
2565 [2564.70] 2029 [2029.29]
2453 [2453.24] 1873 [1873.25]
2342 [2341.77] 1717 [1717.21]
2230 [2230.31] 1561 [1561.17]
2119 [2118.85] 1405 [1405.12]
2007 [2007.38] 1249 [1249.08]
1896 [1895.92] 1093 [1093.04]
1784 [1784.46]
1673 [1672.99] 937 [937.00]
1562 [1561.53] 781 [780.96]
1450 [1450.07] 625 [624.92]
1339 [1338.61] 469 [468.87]
1227 [1227.14] 313 [312.83]
1116 [1115.68] 157 [156.79]
1004 [1004.22]
0 [0.00]
893 [892.75]
781 [781.29]
670 [669.83]
558 [558.36]
447 [446.90]
335 [335.44]
224 [223.98]
113 [112.51]

0 [0.00]
50mm
50mm

Jenkin A-lign 142 Jenkin A-lign 187
Bevelback weatherboard Bevelback weatherboard

N• oteJDDeiimnmkeiennsnAios-lniigosnnwbsiatwhseinitwbherianactkhbeertrasbcoakraeerdtrostouanfridneeisdrhotomumnindil5lei0mdmettmoresmb.eilloliwmfelotorrelsevel (and 175 mm above finished ground level or 100 mm above paving)
• Jenkin A-lign ® base weatherboard to finish min 50 mm below floor level (and 175
mm above finished ground level or 100 mm above paving) © JenkinTimber Ltd. 2012 17

3-Dimensional diagrams

Note: The 3-Dimensional diagrams and CAD drawings in this
manual are current at the date of this manual (November 2012).
For any amendments or updates to these diagrams or drawings,
please refer to our website: jenkin.co.nz/products/a-lign/cad-details

18 © JenkinTimber Ltd. 2012

© JenkinTimber Ltd. 2012 19

Preparing a trimmed opening – 1 Preparing a trimmed opening – 2

Trimming stud Formable flashing tape to corner
Wall underlay folded with 100mm upturn
into opening
Sill trimmer Flashing tape across sill trimmer
with 50mm downturn

Preparing a trimmed opening – 3 Wall underlay

Preparing a trimmed opening – 4

Fit 20mm packer to trimming Jenkin A-lign® bevelback
stud 20mm short of sill trimmer weatherboard
(note drawing)
Quickflash sill tray, stop-ended
Formable flashing tape to with 35mm front downturn, drip
corner with 100mm upturn edge and 20mm high stop-end

prep_trim_open_02.dwg

Flashing tape across sill
trimmer with 50mm downturn
Wall underlay folded into
opening

Direct fixed – fixing guide Cavity fixed – fixing guide

Wall underlay Jenkin A-lign® cavity batten
structurally fixed to each stud,
prep_Fitxrinimg p_oosiptioennfo_r0745.xd3w.1g5mm refer BRANZ bulletin 475

galv jolt-head nails 42mm Jenkin A-lign® bevelback
above overlap to allow for weatherboard
expansion and contraction
Fixing position for 75 x 3.15mm
galv jolt-head nails 42mm
above overlap to allow for
expansion and contraction

Jenkin A-lign® bevelback Wall underlay
weatherboard

20 © JenkinTimber Ltd. 2012

Figure 1.01 Direct fixed – Figure 1.02 Direct fixed –
base of wall – concrete floor – base board base of wall – timber floor – fillet

Wall underlay to finish Wall underlay to finish
10mm below bottom plate 10mm below bottom plate

Jenkin A-lign ® bevelback Jenkin A-lign® bevelback
weatherboard weatherboard

Jenkin A-lign® bevelback Flooring
base board to finish 50mm
below floor slab Jenkin A-lign® bevelback
weatherboard to finish
Concrete foundation wall 50mm below floor slab
to give 100mm minimum
clearance to paving Timber subfloor
(175mm to ground) at
bottom of cladding Jenkin A-lign® tilting fillet

DPC under bottom plate DPC under bottom plate

Concrete foundation wall
to give 100mm minimum
clearance to paving
(175mm to ground) at
bottom of cladding

Figure 1.04 Direct fixed – Figure 1.05 Direct fixed –
eaves – flat soffit eaves – no soffit

Roof underlay
Roof cladding
Guttering

1-01a1_-0b1a_sbea_swea_llw_adlflx_.dfwx_gbase.dwg

Roof framing

Soffit lining Jenkin A-lign ® facing
(fascia)
Jenkin A-lign ® 42 x 18mm
eaves mould Jenkin A-lign® tilting fillet
Jenkin A-lign® bevelback
weatherboard Jenkin A-lign® bevelback
weatherboard
Wall underlay
Wall underlay

Figure 1.07 Direct fixed – Figure 1.08 Direct fixed –
external corner – prefabricated box external corner – mitred

Wall underlay carried Wall underlay carried
around corner around corner

Jenkin A-lign® bevelback Quickflash back flashing
weatherboards taken into
Jenkin A-lign® bevelback
1-05_eavfr_amniongsocofr_nderfx.dwg weatherboard tight mitred
g Jenkin A-lign® pre-cut at corner

36 x 18mm scriber Soaker
Jenkin A-lign ®
prefabricated box corner Jenkin A-lign® bevelback
Jenkin A-lign® bevelback base board tight mitred at
base board corner

Concrete foundation wall Concrete foundation wall
to give 100mm minimum to give 100mm minimum
clearance to paving clearance to paving
(175mm to ground) at (175mm to ground) at
bottom of cladding bottom of cladding

© JenkinTimber Ltd. 2012 21

Figure 1.09 Direct fixed – Figure 1.10 Direct fixed –
internal corner – pre-cut scriber internal corner – scribed

Quickflash back flashing Quickflash back flashing
with seamed edges with seamed edges

Jenkin A-lign® bevelback Jenkin A-lign® bevelback
weatherboard weatherboard scribed to
Jenkin A-lign ® pre-cut each other
36 x 36mm internal scriber
Wall underlay
Wall underlay carried
around corner

DPC under bottom plate DPC under bottom plate

Jenkin A-lign® bevelback Jenkin A-lign® bevelback
base board base board

Concrete foundation wall Concrete foundation wall
to give 100mm minimum to give 100mm minimum
clearance to paving clearance to paving
(175mm to ground) at (175mm to ground) at
bottom of cladding bottom of cladding

Figure 1.11 Direct fixed – Figure 1.11a Direct fixed –
aluminium window – head aluminium window – head – jamb

criber.dwg Jenkin A-lign® bevelback Second layer of wall
weatherboard underlay over flashing
upstand
1-10_int_scrib_cnr_dfx.dwg Wall underlay returned
under lintel
Optional Jenkin A-lign ®
weatherhead Jenkin A-lign® tilting fillet

Aluminium window section Head flashing

Second layer of wall Air seal over backing rod
underlay lapped over
flashing upstand Jenkin A-lign ® pre-cut
36 x 18mm scriber
Wall underlay returned Jenkin A-lign® bevelback
under lintel weatherboard
Jenkin A-lign® tilting fillet
Head flashing Wall underlay returned
around trimming stud

Figure 1.12 Direct fixed – Figure 1.13 Direct fixed –
aluminium window – jamb aluminium window – sill

Air seal over backing rod Air seal over backing rod

Wall underlay returned 1-11a_win_hj_alu_dfx.dwg Flexible flashing tape
around trimming stud across sill trimmer - turn
up 100mm at ends
Jenkin A-lign ® pre-cut
36 x 18mm scriber Wall underlay returned
across sill trimmer
Jenkin A-lign® bevelback
weatherboard

Aluminium window section Quickflash sill tray flashing

Jenkin A-lign® bevelback
weatherboard

22 © JenkinTimber Ltd. 2012

Figure 1.14 Direct fixed – Figure 1.15 Direct fixed –
timber window – head timber window – jamb

Second layer of wall Timber window jamb
underlay over flashing section
upstand Air seal over backing rod
Optional Jenkin A-lign ® 20mm packer
weatherhead Wall underlay returned
Jenkin A-lign® bevelback around trimming stud
weatherboard Jenkin A-lign ® pre-cut
36 x 18mm scriber
Jenkin A-lign ® pre-cut
36 x 18mm scriber Jenkin A-lign® bevelback
weatherboard
Jenkin A-lign® tilting fillet
Jenkin A-lign ® facing
Head flashing
Timber sill profile
Jenkin A-lign ® facing
Timber window section Optional Jenkin A-lign ®
42 x 18mm eaves mould
Figure 1.16 Direct fixed – Figure 1.17 Direct fixed –
timber window – sill meter box – head Jenkin A-lign® bevelback
weatherboard
x.dwg Sill board Wall underlay returned
under lintel with flexible
Quickflash sill tray with flashing tape at corners
stop-ends Second layer of wall
Continuous packer underlay lapped over
flashing upstand
1-15_win_jamFlebx_ibtleimfla_sdhifnxg.tdawpeg Jenkin A-lign® tilting fillet

across sill trimmer - turn Optional Jenkin A-lign ®
up 100mm at ends weatherhead
Head flashing
Timber sill profile Angle fixed and sealed to
meter box
Optional Jenkin A-lign ® Meter box
42 x 18mm eaves mould Jenkin A-lign ® pre-cut
36 x 18mm scriber
Wall underlay returned
across sill Meter box
Jenkin A-lign® bevelback
weatherboard Angle sealed and fixed to
meter box
Figure 1.17a Direct fixed – Figure 1.17b Direct fixed – Flexible flashing tape
meter box – jamb meter box – sill across sill trimmer

Wall underlay returned into Jenkin A-lign® tilting fillet or
trimmed opening packing to suit

m_dfx.dwg Angle sealed and fixed to

1-17_mtrm_ebtoerxb_ohx ead_dfx.dwg

Meter box Wall underlay returned
across sill trimmer
Jenkin A-lign ® pre-cut
36 x 18mm scriber Jenkin A-lign® bevelback
weatherboard
Jenkin A-lign ® bevelback
weatherboard © JenkinTimber Ltd. 2012 23

Figure 1.30 Direct fixed – Figure 1.31 Direct fixed –
pipe penetration above waterproof deck

Wall underlay Wall underlay lapped over
Jenkin A-lign® bevelback membrane upstand
weatherboard
Flexible flashing tape Jenkin A-lign® bevelback
weatherboard
Cover flange with packing Jenkin A-lign® bevelback
behind base board

35mm clearance to deck

Deck membrane 100mm
below floor level over
substrate

Sealant over backing rod
Pipe penetration
Blocking to support pipe

Solid edge blocking

Figure 1.34 Direct fixed – Figure 2.01 Cavity fixed –
apron flashing – stop end base of wall – concrete floor – base board

Wall underlay

Jenkin A-lign® bevelback Wall underlay to finish
weatherboard with 35mm 10mm below bottom plate
clearance to flashing and
75mm upstand cover Jenkin A-lign® cavity batten

Quickflash apron flashing Jenkin A-lign® bevelback
weatherboard
g 1-31_rjecfetnr t_owE2a/tAeSr1pfrofr_cdoveecr k_dfx.dwg Quickflash cavity closure

and cross fall Concrete foundation wall
to give 100mm minimum
Jenkin A-lign® tilting fillet clearance to paving
(175mm to ground) at
Jenkin A-lign® bevelback Roof underlay bottom of cladding
weatherboard
Roofing DPC under bottom plate

Wall underlay lapped over Jenkin A-lign® bevelback
flashing upstand base board to finish 50mm
below floor slab
Guttering (stop 10mm
short of cladding)

Jenkin A-lign® bevelback
weatherboard
Folded or proprietary stop
end

Figure 2.01a Cavity fixed – Figure 2.04 Cavity fixed –
base of wall – concrete floor – fillet eaves – flat soffit

Wall underlay to finish Wall underlay
10mm below bottom plate Roof framing

Jenkin A-lign® cavity batten Soffit lining
Jenkin A-lign® cavity batten
fx.dwg Jenkin A-lign® bevelback 2-01_base_wall_cav_base.dwg
weatherboard to finish Jenkin A-lign ® 42 x 18mm
50mm below floor slab eaves mould

DPC under bottom plate

Concrete foundation wall
to give 100mm minimum
clearance to paving
(175mm to ground) at
bottom of cladding

Quickflash cavity closure Jenkin A-lign® bevelback
Jenkin A-lign® tilting fillet weatherboard

24 © JenkinTimber Ltd. 2012

Figure 2.05 Cavity fixed – Figure 2.06 Cavity fixed –
eaves – no soffit parapet – cap

Roof cladding Metal cap flashing with 5°
Roof underlay cross fall and 70mm cover
to weatherboard, fit over
Guttering saddle flashing at ends

Jenkin A-lign® bevelback Isolating layer (install over
weatherboard timber treated with
Jenkin A-lign ® facing copper-based treatments)
(fascia)
Jenkin A-lign® tilting fillet Shaped packing to suit
Wall underlay
Jenkin A-lign® cavity batten Jenkin A-lign® tilting fillet

Figure 2.07 Cavity fixed – Figure 2.08 Cavity fixed – Jenkin A-lign® cavity batten
external corner – prefabricated box external corner – mitred Wall underlay carried over
parapet
Wall underlay carried Jenkin A-lign® bevelback
around corner weatherboard

Jenkin A-lign® cavity batten Wall underlay carried
around corner
_cav.dwg Jenkin A-lign® bevelback Jenkin A-lign® cavity batten
weatherboards taken into Quickflash back flashing
Jenkin A-lign® bevelback
2-06_tofpra_mwinag lclo_rcnearv.dwg weatherboard tight mitred
at corner
Jenkin A-lign ® pre-cut Soaker
36 x 18mm scriber Quickflash cavity closure
Jenkin A-lign® bevelback
Jenkin A-lign ® base board tight mitred at
prefabricated box corner corner
Concrete foundation wall
Jenkin A-lign® bevelback to give 100mm minimum
base board clearance to paving
(175mm to ground) at
Concrete foundation wall bottom of cladding
to give 100mm minimum
clearance to paving Jenkin A-lign® cavity batten
(175mm to ground) at
bottom of cladding Wall underlay carried
around corner
Figure 2.09 Cavity fixed – Figure 2.10 Cavity fixed – Quickflash back flashing
internal corner – pre-cut scriber internal corner – scribed with seamed edges
Jenkin A-lign® bevelback
Wall underlay carried weatherboard scribed to
around corner each other
Jenkin A-lign® cavity batten
DPC under bottom plate
nr_cav.dwg Quickflash back flashing Concrete foundation
with seamed edges

Jenkin A-lign ® pre-cut
36 x 36mm internal scriber

2-08_exJet_nkminitAr-_ligcnn® rb_ecvealbva.cdkwg

weatherboard

DPC under bottom plate
Concrete foundation

Jenkin A-lign® bevelback Jenkin A-lign® bevelback
base board base board

© JenkinTimber Ltd. 2012 25

Figure 2.11 Cavity fixed – Figure 2.12 Cavity fixed –
aluminium window – head aluminium window – jamb
Figure 2.13 Cavity fixed –
aluminium window – sill Wall underlay returned Air seal over backing rod
under lintel Jenkin A-lign® cavity batten
Wall underlay returned
Jenkin A-lign® cavity batten around trimming stud
Jenkin A-lign ® pre-cut
Jenkin A-lign® bevelback 36 x 18mm scriber
weatherboard Jenkin A-lign® bevelback
weatherboard
Second layer of wall
underlay lapped over Aluminium window section
flashing upstand

Optional Jenkin A-lign ®
weatherhead

Jenkin A-lign® tilting fillet
Quickflash cavity closure

Head flashing
Aluminium window section

Figure 2.13a Cavity fixed –
aluminium window – jamb – sill

Air seal over backing rod Wall underlay returned
around trimming stud
Flexible flashing tape Air seal over backing rod
across sill trimmer - turn Jenkin A-lign® cavity batten
Jenkin A-lign® pre-cut
2-12_wiunp_1ja00mmbm_aat leun_dscav.dwg 36 x 18mm scriber

Wall underlay returned Jenkin A-lign® bevelback
across sill trimmer weatherboard

Jenkin A-lign® cavity batten Air seal over backing rod
Flexible flashing tape
Jenkin A-lign® bevelback
weatherboard Wall underlay returned
across sill trimmer
Figure 2.14 Cavity fixed – Figure 2.15 Cavity fixed – Jenkin A-lign® cavity
timber window – head timber window – jamb batten
2-123-a1_3w_wini_nj_ss_iall_lua_luca_vc.advw.dgwg
Jenkin A-lign® cavity batten Timber window jamb
26 © JenkinTimber Ltd. 2012 section
Second layer of wall Air seal over backing rod
underlay over flashing
upstand 20mm packer
Jenkin A-lign® bevelback
weatherboard Jenkin A-lign® cavity batten
Wall underlay returned
Optional Jenkin A-lign ® around trimming stud
weatherhead Jenkin A-lign ® pre-cut
36 x 18mm scriber
Jenkin A-lign® tilting fillet Jenkin A-lign ® facing
Optional Jenkin A-lign ®
Head flashing 42 x 18mm eaves mould
Jenkin A-lign® bevelback
Jenkin A-lign ® pre-cut weatherboard
36 x 18mm scriber Timber sill profile
Jenkin A-lign ® facing
Timber window section
Air seal over backing rod

Figure 2.16 Cavity fixed – Figure 2.17 Cavity fixed –
timber window – sill meter box – head

Sill board Jenkin A-lign® cavity batten
Jenkin A-lign® bevelback
Timber sill profile weatherboard

Quickflash full width sill Wall underlay returned
tray with stop-ends under lintel with flexible
Continuous packer flashing tape at corners
Second layer of wall
Flexible flashing tape underlay lapped over
across sill trimmer - turn flashing upstand
up 100mm at ends Jenkin A-lign® tilting fillet
Quickflash cavity closure
Wall underlay returned
across sill Optional Jenkin A-lign ®
weatherhead
Jenkin A-lign® cavity batten Head flashing
Angle fixed and sealed to
Optional Jenkin A-lign ® meter box
42 x 18mm eaves mould Meter box
Jenkin A-lign ® pre-cut
Jenkin A-lign® bevelback 36 x 18mm scriber
weatherboard
Meter box
Figure 2.17a Cavity fixed – Figure 2.17b Cavity fixed –
meter box – jamb meter box – sill Angle fixed and sealed to
meter box
Wall underlay returned into
trimmed opening Flexible flashing tape to sill
trimmer
av.dwg Jenkin A-lign® cavity batten Wall underlay returned
across sill trimmer
Jenkin A-lign ® pre-cut
36 x 18mm scriber

2-17_mtr_box_head_cav.dwg

Angle fixed and sealed to
meter box

Jenkin A-lign® bevelback Jenkin A-lign® tilting fillet or
weatherboard packing to suit
Jenkin A-lign® cavity batten
Meter box Jenkin A-lign® bevelback
weatherboard
Figure 2.30 Cavity fixed – Figure 2.31 Cavity fixed –
pipe penetration above waterproof deck Wall underlay lapped over
membrane upstand
Wall underlay Jenkin A-lign® cavity batten
Jenkin A-lign® cavity batten Jenkin A-lign® bevelback
weatherboard
b_cav.dwg 2-17b_mStre_ablaontxo_vesrilbl_acckainvg.rdodwg Quickflash cavity closure
Jenkin A-lign® bevelback
Cover flange with packing base board
behind 35mm clearance to deck
Deck membrane 100mm
Blocking to Jenkin A-lign® bevelback below floor level over
support pipe weatherboard substrate
Pipe penetration
Solid edge blocking © JenkinTimber Ltd. 2012 27
Flexible flashing tape

Figure 2.34 Cavity fixed – Figure 2.36 Cavity fixed –
apron flashing – stop end balustrade – wall junction

Jenkin A-lign® bevelback Wall underlay Wall underlay
weatherboard Jenkin A-lign® cavity batten Jenkin A-lign® cavity batten
Jenkin A-lign® bevelback
Figure 2.38 Cavity fixed – weatherboard with 35mm Formable flexible flashing
horizontal cavity joint clearance to flashing and tape dressed 50mm min
75mm upstand cover down face of wall at rear
of cavity
Wall underlay lapped over Packing to 5° cross fall
flashing upstand
Quickflash back flashing
Raked Quickflash cavity with seamed edges
closure with 15mm drip
edge
Roofing
Roof underlay

Quickflash apron flashing
refer to E2/AS1 for cover
and cross fall
Folded or proprietary stop
end

Jenkin A-lign® cavity batten

Wall underlay lapped over
flashing

2-36_fraJmen_kbinaAl-clig_nw® tailtli_ngjcfitlnle_t cav.dwg

Quickflash cavity closure

Quickflash head flashing

Wall underlay
Jenkin A-lign® bevelback
weatherboard

wg

28 © JenkinTimber Ltd. 2012

CAD Drawings – direct fixed

Note: The 3-Dimensional diagrams and CAD drawings in this
manual are current at the date of this manual (November 2012).
For any amendments or updates to these diagrams or drawings,
please refer to our website: jenkin.co.nz/products/a-lign/cad-details

© JenkinTimber Ltd. 2012 29

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Figure 1.03 Direct fixed – eaves – angled soffit

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© JenkinTimber Ltd. 2012 31

Fig 1-05

FiguBreev1.e0l5baDcirkecwt feixaethde–rebaovaersd–-ndoirseocfftitfixed - eaves - no soffit

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spouting Min overhang of roofing beyond

fascia

Eaves flashing where roof pitch

50mm less than 10°and fascia is less
than 100mm for cladding

flashing by roofer

Solid blocking Ensure that
weatherboard
Internal lining projects above top
Wall underlay of fascia

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32 © JenkinTimber Ltd. 2012

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© JenkinTimber Ltd. 2012 33

Bevelback weatherboard - direct fixed - internal corner - scribed

Figure 1.10 Direct fixed – internal corner – scribed

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Quickflash Code 13 corner back
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flashing - Extra high requires a
cavity

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34 © JenkinTimber Ltd. 2012

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Bevelback weatherboard - direct fixed - aluminium window - sill

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38 © JenkinTimber Ltd. 2012
10mm cover
5mm gap

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Figure 1.18 Direct fixed – external corner – prefabricated box – stucco

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Figure 1.20 Direct fixed – above stucco

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Figure 1.22 Direct fixed – internal corner – pre-cut scriber – profiled metal

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© JenkinTimber Ltd. 2012 43

Figure 1.24 Direct fixed – below profiled metal

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44 © JenkinTimber Ltd. 2012

Figure 1.26 Direct fixed – external corner – masonry veneer

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© JenkinTimber Ltd. 2012 45
Jenkin A-lign® 66 x
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46 © JenkinTimber Ltd. 2012

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Figure 1.32 Direct fixed – reverse raked soffit

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top weatherboard

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to provide an air barrier
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48 © JenkinTimber Ltd. 2012