The application: Shera Weatherboard (Plank) Technical Manual

pacific build supply ltd

June 2021

The application:

Shera Weatherboard (Plank)

Technical Manual

WEATHERBOARD PRODUCT ONLY

Copyright 2021. © Pacific Build Supply Ltd

pacific build supply ltd

Contents:

1 Product Information 3

1.1 Scope and Application

1.2 Each Parties Responsibilities

1.3 Building Regulations

1.4 Technical Specification

1.5 Storage & Handling

1.6 Health and Safety

1.7 Working Guidelines

2 Details 7

3 Installation Guide 27

3.1 Timber Framing

3.2 Wall Underlay

3.3 Opening Preparations, Joinery & Flashing.

3.4 Cavity Closer

3.5 Cavity Battens

3.6 Cant Strip

3.7 Clearances

3.8 Weatherboard Setout

3.9 Fixings

3.10 Joints

3.11 Pipes and Service Penetrations

3.12 Protective Coating

4 Maintenance 32

5 Product Order List 33

6 Product Warranty 35

www.pacbld.com 0800 2255 727 Shera Weatherboard Technical Manual | June 2021 | 3 pacific build supply ltd

1 Product Information SHERA WEATHERBOARD (Plank) is a 15mm thick, medium density bevel-backed fibre cement weatherboard that is used as an external cladding. It is classified as a light wall cladding, suitable for residential and light commercial type buildings. The weatherboard is durable, easy to install and resistant to fire, water and rotting. Shera Weatherboard has a sanded surface ready to apply a finish coating. With no LRV restrictions, it can be painted any colour you wish.

1.1 Scope and Application Shera Weatherboard has a BRANZ Appraisal No. 997 and it must be read in conjunction with the latest technical manual.

Shera Weatherboard is suitable for use as a Fibre Cement Weatherboard cladding, installed in accordance with NZBC Acceptable Solution E2/AS1 Section 9.5 and limited to the scope of E2/AS1 Paragraph 1.1.

Shera Weatherboard is fixed to the framing over a nominal 20mm drained cavity and can be used for buildings with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2. It can be used for buildings situated up to and including Extra High wind zones as per NZS 3604.

Shera Weatherboard must only be installed horizontally on vertical surfaces.

All exposed faces of the weatherboard must be finished with a minimum of a 2-coat latex exterior paint system complying with any of Parts 7, 8, 9 or 10 of AS 3730.

For use of Shera Weatherboard outside this published scope, it must be specific design by the architect, designer or engineer and they will be responsible to ensure its compliance with the NZBC requirements.

Shera Weatherboard was formally known as Pacbld Siding.

1.2 Each Parties Responsibilities

Architects / Designers / Specifiers

The architects, designers or specifiers are responsible for the incorporation of Shera Weatherboard cladding into their design in accordance with the information and details in the technical manual and BRANZ Appraisal, checking it is suitable for the intended scope and application.

Any details not contained here in this manual are non-standard details and is outside the published scope. Any non-standard detailing must be specific design by the building designer, and it is their responsibility to design details to meet their own requirements and compliance with the NZBC.

Building Contractor / Installer

Building contractors or installers are responsible for the quality of installation of the building underlay, cavity battens and Shera Weatherboard and accessories.

The installer must follow the information and details provided by the technical manual, the designer and the project specification. It is the installer’s responsibility to ensure that the quality of the product meets their aesthetic expectations before installation. Any visual defects do not constitute as product failure. Once the products have been installed, the installer has taken responsibility for them and Pacific Build Supply Ltd will not be responsible for the products.

Sub Trades are responsible for the installation of penetrations, flashing etc that are relevant to their trade, and must be installed as per the products manufacturer’s instructions, this manual, designer’s details or project specification.

Shera Weatherboard

http://www.pacbld.com/

4 | Shera Weatherboard Technical Manual | June 2021

1.3 Building Regulations Shera Weatherboard is an Acceptable Solution in terms of the New Zealand Building Code compliance pathway, please refer to BRANZ Appraisal for more information.

Clause B1 Structure

The mass of the 180mm wide Shera Weatherboard when installed on the wall is 24.4kg/m2 at equilibrium moisture content (EMC). Shera Weatherboard is therefore considered a light wall cladding in terms of NZS 3604.

The Shera Weatherboard will resist impacts likely to be encountered in normal residential use. The likelihood of impact damage to the cladding when used in light commercial situations should be considered at the design stage, and appropriate protection such as the installation of bollards and barriers provided for vulnerable areas.

Shera Weatherboard is suitable for use in all Wind Zones of NZS 3604 up to, and including, Extra High where buildings are designed to meet the requirements of NZBC Acceptable Solution E2/AS1, Paragraph 1.1.

Clause B2 Durability

Shera Weatherboard has an LBA durability appraisal, ref Report 171204-02, which assesses the products to meet the following NZBC Clause B2 Durability requirements:

• Cladding fibre-cement Shera Weatherboard meets the NZBC durability requirement of not less than 15-year service life according to clause B2.3.1(b).

Clause C3 Fire affecting areas beyond the fire source

Shera Weatherboard meet the requirements of NZBC C3.7, the product being non-combustible.

Shera Weatherboard has been tested in accordance with ISO 5660.1, ref BRANZ Test Report FH06307-002, and meets the requirements of the NZBC Clause C Acceptable Solutions Paragraph 5.8. The weatherboard is classified as Type A (when finished with a paint coating of not more than 1.0mm in thickness. Therefore, the product is suitable for use on buildings at any distance to the relevant boundary.

Clause E2 External Moisture

Shera Weatherboard has been tested and complies with the requirements of AS/NZS 2908: Part 2 – Cellulose-cement products flat sheet, classified as Category 4 for Type A.

Shera Weatherboard incorporates a first and second line of defence against water penetration by separating the cladding from the external wall framing with a nominal 20mm cavity. The cavity allows for any occasional ingress water that may get past the external skin to drain to the exterior of the building, and any remaining moisture to dry by evaporation.

Details within this manual must be followed to defend against moisture entry for all joints, penetrations and junctions.

Weathertightness details that are developed by the designer are non-standard details and outside the scope of the BRANZ Appraisal and are the responsibility of the designer for compliance with the NZBC.

Clause F2 Hazardous Building Materials

Shera Weatherboard meets the requirement NZBC Clause F2 Hazardous Building Materials, as asbestos was not detected, ref. Report 1745344-A2P-1m, and will not present a health hazard to people when installed and handled as per this manual.


1.4 Technical Specification Shera Weatherboard is extremely durable, strong and dimensionally stable with no shrinkage. The weatherboard is resistant to fire, weather and chemical corrosion. Shera Weatherboard is easy to install with normal workable tools and easy to maintain during its life.

Product Description

Shera Weatherboard weatherboards has a bevel cut on the back of the weatherboard and the front bottom edge is chamfered.

Table 1: Shera Weatherboard Product Description

Code Thickness (mm)

Width (mm)

Length (mm)

Colour Surface End Trimmed Weight Max. # of lengths per pallet

PBS4071 15 180 4200

Natural

Looks Light beige

Smooth sanded

Square Edge

Yes Approx. 19 kg per length

144

(2.7 tonne)

1 Dimension tolerances – Tested in accordance with ASTM C1185 & EN 12467

Production Method

Shera Weatherboard is a unique fibre cement composite of natural fibres bonded tightly in a high-grade silicate structure with a unique autoclave treatment during the curing process.

The fibre cement weatherboard is manufactured by Mahaphant Fibre Cement Public Co Ltd, Thailand.

The manufacturer’s name for this fibre cement range is “Shera Plank” which Pacific Build Supply Ltd has branded as Shera Weatherboard. The product is identified by branding on the rear of the weatherboard, showing the name ‘Shera Plank’ and a batch code.

For a copy of the Material Safety Data Sheet (MSDS) for Shera Plank, please contact Pacific Build Supply Ltd.

Shera has an Environmental Product Declaration (EPD) available on request.

Product Composition

The fibre cement Shera Weatherboard consists of the following:

• Portland cement

• Silica Sand

• Cellulose Fibre

• Water

• Mineral fillers

• Functional additives



Product Technical Data

Table 2: Shera Weatherboard Product Technical Data

Properties Test Standard Shera Weatherboard Results

Density AS/NZS 2908.2:2000

Ref 54S061914/D/NLH

1200-1400 kg/m3

Bending Strength / Modulus of Rupture (MOR)

AS/NZS 2908.2:2000

Ref 54S066385/1/NLH

16.0 N/mm2

Category 4, Type A

Water Permeability AS/NZS 2908.2:2000

Ref 54S061914/H/NLH (6mm Board)

No Drops of water forming on the underside.

Warm Water AS/NZS 2908.2:2000

Ref 54S066385/1/NLH

Pass, > 0.75 ratio.

Heat-Rain AS/NZS 2908.2:2000

Ref 54S066385/3A/OYC

No visible cracks, delamination, and other defects that could affect performance in use.

Soak / Dry BS EN 12467:2000

Ref 54S070466/1/NLH

Pass, > 0.75.

Frost Resistance /

Freeze & Thaw

BS EN 12467:2000

Ref 54S070466/1/NLH

Pass, > 0.75.

Reaction to Fire ISO 5660.1

Ref FH06307-002

NZBC C/AS1 Table 5.1

SH Group

Suitable for use on buildings with a SH Risk Group classification, at any distance to the relevant boundary.

NZBC C/AS2 Paragraph 5.8.1

Type A

Peak Heat Released < 100kW/m2

Total Heat Released < 25MJ/m2

Note:

(1) When Shera Weatherboard is finished with a paint coating of not more than 1.0mm in thickness, the exterior surface finishes requirements of NZBC Acceptable Solutions C/AS1-C/AS2 Paragraph 5.8.1 do no apply in accordance with NZBC C/AS2 Paragraph 5.8.2 a).

(2) The Shera Weatherboard BRANZ Appraisal only covers buildings 10m or less in height. NZBC Functional requirement C3.2 identifies that external vertical fire spread to upper floors only needs to be considered for buildings with a building height greater than 10m. Control of external vertical fire spread is therefore outside the scope of this Appraisal.


1.5 Storage & Handling

• Shera Weatherboard are packed on pallets. They must be kept dry during transport.

• Shera Weatherboard must be horizontally stacked on a flat surface.

• Shera Weatherboard must always be sufficiently supported so that they do not sag.

• They must be stored in a dry ventilated space.

• If Shera Weatherboard are stored outside, they must always be protected against rain and sun by a tarpaulin or plastic sheet.

• Long-term storage of Shera Weatherboard outside is not recommended, as changes in humidity may cause bowing in boards.

• If they do become wet in the packing, all packaging must be removed, and they must be wiped dry and placed in a way that they can dry completely. DO NOT install damp or wet boards.

• Shera Weatherboard must always be lifted from a stack by two people and then be carried on edge.

• Site damage or mishandling of Shera Weatherboard does not constitute as product failure.

• Storage and handling of all materials supplied by Pacific Build Supply Limited or the contractor, whether on site or off site, is under the control of the building contractor.

• Any accessories must be stored so they are kept clean, dry and undamaged. All accessories must be used within the maximum storage period recommended by the manufacturer.

1.6 Health and safety – Work

• While the weatherboards are being processed, dust will be released which may irritate airways and eyes. It is recommended that a minimum P2 dust mask and safety goggles be worn.

• Always warn others in the immediate area when cutting/sanding/drilling/etc.

• Appropriate dust extraction or proper ventilation should be used depending on the room in which the work is being carried out or the equipment being used.

• Long-term exposure to inhalation of dust containing crystalline silica can be harmful to health.

• Clean-up methods include vacuuming with a vacuum cleaner or if sweeping, dampen or wet the sawdust to suppress dust. Waste may be disposed of by landfill in compliance with New Zealand requirements.

• NEVER dry sweep as it may excite silica dust particles into the user’s breathing area.

• For more information, a Shera Products Material Safety Data sheet is available on request.

1.7 Working Guidelines

For onsite cutting:

• With a stationary saw, slow rotation with tungsten carbide-tipped blade or fast rotation with a fluted diamond cutting blade.

• With a hand circular saw (with rail), slow rotation with tungsten carbide-tipped blade or fast rotation with a fluted diamond cutting blade.

• With a jigsaw with tungsten carbide-tipped tooth cutting blade.

• Conventional woodworking equipment can be used but in general wear faster and have lower quality edges.

Drilling:

• For holes: TCT Drill (Tungsten Carbide Tipped) or tile & glass drill bit, with spear tipped.

• For round apertures: cup drill or circular cutter, carbide-tipped.

• The weatherboard should be supported around the hole to be drilled (e.g. by a wooden surface).

• Cutting and drilling must take place in a dry environment.

Example of spear tipped



2 Details

PSL. Shera Weatherboard (Plank) Drawing List

DWG. No. Description Issued Pg. #

PSL.0.10 3D Overview of Shera Weatherboard Cladding Version Mar 2021 10

PSL.1.11 Vertical Joint with Back Soaker Mar 2021 11

PSL.1.12 Vertical Wall Section – Board overlap & fixings Mar 2021 12

PSL.2.01 Internal 90° Corner – One-piece Corner Flashing Mar 2021 13

PSL.2.02 External 90° Corner – Pacbld Corner Soaker Option Mar 2021 14

PSL.2.03 External 90° Corner – Boxed & Scribed Option Mar 2021 15

PSL.3.01 Bottom Plate Detail Mar 2021 16

PSL.3.02 Continuous Mid Floor Joint Mar 2021 17

PSL.3.03 Inter-storey Junction – With Flashing Mar 2021 18

PSL.3.04 Bottom Plate Detail – Enclosed deck with membrane Mar 2021 19

PSL.3.12 Wall to Soffit Junction Mar 2021 20

PSL.4.01 Window/Door Head Detail Mar 2021 21

PSL.4.02 Window/Door Sill Detail Mar 2021 22

PSL.4.03 Window/Door Jamb Detail Mar 2021 23

PSL.4.11 Meter Box – Head & Sill Details Mar 2021 24

PSL.4.12 Meter Box – Jamb Detail Mar 2021 25

PSL.8.01 Service Cable/Pipe Penetration Detail Mar 2021 26

General Notes

• Rigid Wall Underlay or Rigid Sheathing or not drawn for clarity.

• If Shera RWU selected, refer to Shera RWU Manual for Rigid Wall Underlay Installation.

• Timber Cavity Battens temporarily fixed until cladding is fixed into the framing.

• Pacific Build Supply Ltd do not supply any of the flashings

Fixing of Shera Weatherboard

✓ ALWAYS start working from the lowest weatherboard

✓ ALWAYS pre-drilled nails holes in weatherboard before fixing with SS Jolt Head nails. DO NOT use gun nails!

✓ ALWAYS face fix all weatherboards at every stud, max. 600mm centres. Concealed Fixing is NOT an option.

✓ CAN first tack on weatherboards to hold in place until face fixed.

▪ Fixing nail length varies depending on selected wall underlay. Ensure min. 35mm penetration into framing as per E2/AS1 Table 24. Refer Table 3 on details or Table 4 in Installation Section.

Non-Standard Details

▪ Any details not contained here in this manual are non-standard details and is outside the scope of the BRANZ Appraisal. Additional non-standard detailing must be specific design by the designer. It is the designer’s responsibility to develop additional details to meet their own requirements and compliance with the NZBC. For Example, where Shera Weatherboard abuts another cladding it is considered a non-standard detail.


Component 2: Wall Underlay

Shera Weatherboard Back Soaker

Timber or Concrete Floor

Timber Framing

used behind joints, shown dashed

Shera Weatherboard Corner Soaker

External Corner Finish option

Suitable for 180 Shera Weatherboard

dimensions

Stocked product

Face Fixings

m

a

x

.

6

0

0

m

m

c

e

n

t

r

e

s

Refer Fixing Table for suitable fixing length

based on Wall Underlay

select from: 90 / 100mm SS Jolt Head Nails

m

i

n

.

1

0

0

m

m

f

r

o

m

s

t

u

d

Vertical Battens and

only Horizontally at the top of Cavity

H3.1 Cant Strip

to start first board at the correct angle

Component 1 - Cladding

i.e. Shera RWU (Rigid Wall Underlay) with

Solitex Extasana Adhero (PSM)

Shera Weatherboard (Plank)

Flexible or Rigid Wall Underlay

as per E2/AS1 9.1.8.3 or has BRANZ Appraisal

PVC Cavity Closer

Insulation

m

i

n

.

6

0

0

m

m

s

t

a

g

g

e

r

f

r

o

m

a

d

j

a

c

e

n

t

H3.1 Timber Cavity Battens

Accessories - Supplied by Others

Boxed Corner Facings / Trims,

Scribers and Flashings

Indicative Section Only

Refer details for more

information

3D Overview of Shera Weatherboard Cladding Version

Shera Weatherboard Manual

NTS June 2021

SW.0.11.Overview

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pacific build supply ltd www.pacbld.com 0800 2255 727 Dwg. No.

Scale Date

BRANZ Appraisal No. 997 - Shera Weatherboard Cavity CladdingApplication:-Scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1-With Risk Score of 0-20 over min. 20mm cavity (E2/AS1 Table 2)-Situated in NZS 3604 Wind Zones up to and including Extra high.

Supplied by Pacbld

Key:

By Others

MIN. 100mm

SHERA WEATHERBOARD

VERTICAL JOINT POSITIONED

BETWEEN STUDS

-MIN. 150mm FROM CENTRE OF STUD

-STAGGER JOINTS MIN. 600mm FROM

ADJACENT

DO NOT PLACE JOINT OVER FACE OF

STUD OR BATTEN

INTERNAL LINING

PRE-DRILL HOLES FOR FIXINGS,

FACE FIX SHERA WEATHERBOARD WITH

JOLT HEAD NAILS. REFER TO NOTE 1 &

TABLE 3

SHERA WEATHERBOARD BACK SOAKER

VERTICAL JOINT WITH BACK SOAKER

MIN

. 35m

m

EM

BE

DM

EN

T

WALL UNDERLAY AS PER NZBC

E2/AS1, 9.1.7 (FLEXIBLE OR RIGID)

TIMBER FRAMING TO NZS 3604

45x20mm H3.1 TIMBER CAVITY BATTEN

TEMPORARILY FIXED UNTIL CLADDING

IS FIXED

EXTERIOR

INTERIOR

DO NOT GUN NAIL FIX

SHERA WEATHERBOARD !

INSULATION

SHERA WEATHERBOARD

BACK SOAKER 0.7mm

ALUMINIUM

EMBED SHERA WEATHERBOARD INTO A

CONTINUOUS BEAD OF FLEXIBLE SEALANT.

LEAVE PROUD, ALLOW SEALANT TO

COMPLETELY CURE THEN TRIM OFF

1mm

ALLOW 1mm EXPANSION GAP

3D - JOINT WITH

BACK SOAKER

SHERA WEATHERBOARD

BACK SOAKER

EMBED WITH

FLEXIBLE SEALANT

SHERA WEATHERBOARD

JOINT

15

± 2

180 ± 2

SHERA WEATHERBOARD

PROFILE

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Scale DateVertical Joint with Back Soaker


NTS / 1:2 June 2021

SW.1.11

Step 1: Tacking

Fix into studs only at each end and

one centrally for tacking.

Fix 20mm from top edge of lower

board.

Driven flush with the board face.

Step 2: Face Fixing

Fix into studs only, at max. 600

centres.

Fix 20mm from bottom edge of top

board through both thicknesses.

Punch jolt head 2mm below the

surface of the board and fill.

Note 1: Fixing instruction

Table 3: Face Fixing pre-drill size and nail length

SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm

Pre-Drill Pre-Drill Ø 3.5mm Pre-Drill Ø 4.0mm

Face Fixing 90 x 3.55mm 100 x 4.0mm

Supplied by Pacbld

Key:

By Others

FLEXIBLE WALL UNDERLAY

AS PER E2/AS1 9.1.7.1

TIMBER STUD

SHERA WEATHERBOARD

45x20mm H3.1 CAVITY

BATTEN

PRE-DRILL Ø3.5mm HOLE

FACE FIX WITH 90 x 3.55mm JOLT HEAD NAIL

REFER NOTE 1 & TABLE 3

30

20

SH

ER

A W

EA

TH

ER

BO

AR

D W

ID

TH

180m

m

150m

m C

OV

ER

MIN. 35mm

EMBEDMENT

RIGID WALL UNDERLAY

AS PER E2/AS1 9.1.7.2

TIMBER STUD

SHERA WEATHERBOARD

45x20mm H3.1 CAVITY

BATTEN


FACE FIX WITH 100 x 4.0mm JOLT HEAD NAIL

REFER NOTE 1 & TABLE 3

30

20

SH

ER

A W

EA

TH

ER

BO

AR

D W

ID

TH

180m

m

150m

m C

OV

ER

WITH RIGID WALL UNDERLAY

MIN. 35mm

EMBEDMENT

20


TACK WITH 50 x 2.8mm JOLT HEAD NAIL

REFER NOTE 1


TACK WITH 50 x 2.8mm JOLT HEAD NAIL

REFER NOTE 1

20

WITH FLEXIBLE WALL UNDERLAY

© THIS DRAWING IS THE PROPERTY OF PACIFIC BUILD SUPPLY LTD AND MUST NOT BE COPIED WITHOUT PERMISSION


Scale Date

Note: If Rigid Wall Underlay is more than 9mm thick, the nail length

must be increased to ensure min. 35mm penetration into framing.

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

Vertical Wall Section - Board Overlap and Fixings


NTS June 2021

SW.1.12

TIMBER STUDS

ONE-PIECE 'W' CORNER FLASHING

WITH HEMS, REFER E2/AS1 9.5.3.4

PVC DUCT TAPE FOR DISSIMILAR

MATERIAL SEPARATION IF REQUIRED

SHERA WEATHERBOARD


FACE FIX SHERA WEATHERBOARD

WITH JOLT HEAD NAILS. REFER TO

NOTE 1 & TABLE 3

WALL UNDERLAY



IS FIXED

DO NOT GUN NAIL FIX


SQUARE CUT SHERA

WEATHERBOARD AND

BUTT TO ONE PIECE CORNER

FLASHING

min. 50m

m C

OV

ER

RE

FE

R E

2/A

S1 T

AB

LE

7

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Scale Date


Internal 90° Corner - One-piece Corner Back Flashing 1:2 June 2021

SW.2.01

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

SHERA WEATHERBOARD

MITRE CUT AT CORNER




NOTE 1 & TABLE 3

WALL UNDERLAY

TIMBER STUDS



IS FIXED

DO NOT GUN NAIL FIX


SHERA WEATHERBOARD CORNER

SOAKER WITH MIN. 15mm COVER

OVER WEATHERBOARDS

FIXED WITH 40x2.8mm SS FLAT HEAD

NAILS AT TOP, IN PRE-PUNCHED

HOLES

TIMBER CAVITY

BATTENS

SHERA

WEATHERBOARD

PACBLD CORNER

SOAKER

TIMBER STUDS

FACE FIXINGS

WALL UNDERLAY

3D VIEW OF

EXTERNAL CORNER

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Scale Date


External 90° Corner with Pacbld Corner Soaker Option NTS / 1:2 June 2021

SW.2.06

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

WALL UNDERLAY

TIMBER STUDS



IS FIXED

TIMBER BOXED CORNER,

EMBED SEALANT BETWEEN JOINT

FIXED WITH 75 x 3.15 SS JOLT

HEAD NAILS

PRE-PRIMED TIMBER SCRIBER

CUT TO FIT WEATHERBOARD

EMBED WITH FLEXIBLE SEALANT.

PRE-DRILL 3mm HOLE AND FIX WITH

75x3.15mm SS JOLT HEAD NAIL

min

. 5

0m

m C

OV

ER

SCREW FIX AT CORNER

SHERA WEATHERBOARD

MITRE CUT AT CORNER




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


TIMBER CAVITY

BATTENS

SHERA

WEATHERBOARD

TIMBER BOXED

CORNER

TIMBER STUDS

FACE FIXINGS

WALL UNDERLAY

3D VIEW OF

EXTERNAL CORNER

SCRIBERS

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Scale Date


External 90° Corner with Boxed & Scribed Corner Option NTS / 1:2 June 2021

SW.2.07

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

FFL

FWU min. 35mm

min. 50m

m

min. 100mm TO PAVED GROUND

min. 175mm TO UNPAVED GROUND

AS PER E2/AS1 CLAUSE 9.1.3

SHERA WEATHERBOARD

WALL UNDERLAY



IS FIXED

CANT STRIP H3.1 TREATED TIMBER

PVC CAVITY CLOSER

DPC

BOTTOM

PLATE

FINISHED GROUND LEVEL

CONCRETE SLAB

OR BLOCKWORK




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Bottom Plate Detail 1 : 2 June 2021

SW.3.01

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

NO FACE FIXING AT MID FLOOR

BELOW BATTEN SPACING

FACE FIX BOTTOM BOARD ONLY

FINISH FLUSH WITH BOARD FACE

WALL UNDERLAY



IS FIXED

SHERA WEATHERBOARD

FFL

BOTTOM

PLATE

FLOORING

TOP PLATE

TIMBER

FLOOR

JOISTS


FACE FIX INTO CANT STRIP AND

ABOVE BATTEN SPACING

20

20




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Continuous Mid Floor Joint 1 : 2 June 2021

SW.3.02

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

ALUMINIUM INTER-STOREY FLASHING

-WITH 15° SLOPE REFER E2/AS1 FIG. 70

-COVER AS PER E2/AS1 TABLE 7

min. 5mm GAP

min. 30mm

COVER

min. 35mm

COVER

PVC CAVITY CLOSER

min. 15mm DRIP

FLASHING TAPE OR ADDITIONAL WALL

UNDERLAY TO OVERLAP FLASHING

FFL

BOTTOM

PLATE

FLOORING

TOP PLATE

TIMBER

FLOOR

JOISTS

WALL UNDERLAY



IS FIXED

SHERA WEATHERBOARD

Note 2 This detail is required to limit

continuous cavities to a maximum of 2

stories or 7m. Refer E2/AS1 Clause 9.1.9.4.


FACE FIX INTO CANT STRIP AND ABOVE

BATTEN SPACING




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Inter-Storey Junction 1 : 2 June 2021

SW.3.03

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

DPC

min. 10mm DRIP EDGE

min. 35mm TO ENCLOSED DECK

AS PER E2/AS1 CLAUSE 9.1.3

SHERA WEATHERBOARD



IS FIXED. MACHINE OUT BACK FOR

MEMBRANE, IF REQUIRED


PVC CAVITY CLOSER

FFL

BOTTOM

PLATE

min. 100mm TO

ENCLOSED DECK

AS PER E2/AS1

CLAUSE 7.1.2

min. 150mm

MEMBRANE

UPSTAND

WALL UNDERLAY

CARRY DECK MEMBRANE UP BEHIND

WALL UNDERLAY

ENCLOSED DECK STRUCTURE

FLOOR / WALL

STRUCTURE

NOTES:

-Check bulking of Deck Membrane.

-Common solution is to either machine

framing before membrane or machine out

back of batten (as shown).

-Check with Deck Membrane manufacturer's

instructions for fixings penetrating the

membrane.




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Bottom Plate Detail - Enclosed Deck 1 : 2 June 2021

SW.3.04

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

SLOPED SOFFIT / RAKING

RAKING TOP

PLATE /

TOP PLATE

ANGLE OF

SOFFIT VARIES

BLOCKING

BETWEEN

STUDS FOR

BATTEN FIXING

SOFFIT

FRAMING

TOP HORIZONTAL CAVITY BATTEN TO

RESTRICT AIR MOVEMENT

SOFFIT

FRAMING

TIMBER TRIM AS PER E2/AS1

SHERA WEATHERBOARD

m

in

. 5

0

m

m

min. 35m

m

TYPICAL SOFFIT

1

3.12

2

3.12

WALL UNDERLAY

SHERA WEATHERBOARD

SOFFIT DIRECT FIXED

WALL UNDERLAY

TOP HORIZONTAL CAVITY BATTEN TO

RESTRICT AIR MOVEMENT

SOFFIT DIRECT FIXED

FLASHING AS PER E2/AS1



IS FIXED



IS FIXED

as per E2/AS1 Fig. 8a (b)

as per E2/AS1 Fig. 8a (d)




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX





NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Wall to Soffit Junction 1 : 2 June 2021

SW.3.12

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

SHERA WEATHERBOARD

WALL UNDERLAY

TIMBER STUDS



IS FIXED

E2/AS1 ALUMINIUM HEAD FLASHING

WITH 15° FALL, UPSTAND AND STOP ENDS

ADDITIONAL SEALANT FOR VERY HIGH

AND EXTRA HIGH WIND ZONES

5mm GAP

min. 10mm COVER

min. 15mm DRIP EDGE

min. 35m

m C

OV

ER

RE

FE

R T

AB

LE

7

JOINERY - INSTALL AS PER WINDOW

MANUFACTURERS INSTRUCTIONS

FLASHING TAPE OR ADDITIONAL WALL

UNDERLAY TO OVERLAP FLASHING


PVC CAVITY CLOSER

LINTEL

WINDOW

LINER

TEMPORARY

PACKERS

INTERNAL

LINING

IF REQUIRED,

ARE TO BE

REMOVED

AFTER FIXING

SEAL INSIDE CORNER

TURN UP

CUT OUT

10

10

3D VIEW OF

HEAD FLASHING STOP END

8

AIR SEAL AS PER E2/AS1 9.1.6

WALL UNDERLAY AND FLEXIBLE FLASHING

TAPE DRESSED TO FRAMING.

REFER E2/AS1 FIG 72B

Refer E2/AS1 9.1.10.4




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Window & Door Head Detail 1 : 2 June 2021

SW.4.01

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

min. 8mm COVER

SHERA WEATHERBOARD




IS FIXED

WALL UNDERLAY AND FLEXIBLE

FLASHING TAPE DRESSED TO FRAMING.


PACKERS

JOINERY AND

SILL SUPPORT BAR - INSTALL AS PER WINDOW


WALL UNDERLAY

HORIZONTAL STRIP OF SHERA

WEATHERBOARD UNDER SILL AS

NECESSARY TO SUIT PROFILE

SILL PLATE

WINDOW

LINER

INTERNAL

LINING

8




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Window Sill Detail 1 : 2 June 2021

SW.4.02

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

SHERA WEATHERBOARD



IS FIXED

WALL UNDERLAY AND FLEXIBLE FLASHING

TAPE DRESSED TO FRAMING.


LINE OF HEAD FLASHING ABOVE

TIMBER SCRIBER


PACKERS

min. 20mm COVER min. 10mm COVER

JOINERY - INSTALL AS PER WINDOW


WINDOW

LINER

INTERNAL

LINING

8




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Window & Door Jamb Detail 1 : 2 June 2021

SW.4.03

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

SHERA WEATHERBOARD




NOTE 1 & TABLE 3

WALL UNDERLAY

TIMBER STUDS



IS FIXED

FIT AIR SEAL AROUND ALL SIDES

OF BOX, AS PER E2/AS1 9.1.6

E2/AS1 ALUMINIUM HEAD FLASHING

WITH 15° FALL, UPSTAND AND STOP ENDS

SEAL AND RIVET ANGLE TO METERBOX

AND TO HEAD FLASHING

min. 10mm COVER

METERBOX - INSTALL AS

MANUFACTURER'S INSTRUCTIONS

ADDITIONAL WALL UNDERLAY OR

FLASHING TAPE OVERLAP FLASHING

CANT STRIP

CAVITY CLOSER WITH min. 15mm DRIP

EDGE TO SHERA WEATHERBOARD

min. 35m

m C

OV

ER

RE

FE

R T

AB

LE

7

SEAL AND RIVET ANGLE TO ALL SIDES

OF THE METER BOX

min. 10mm COVER


FLASHING TAPE DRESSED TO FRAMING.


min. 5mm GAP

SHERA WEATHERBOARD SHALL

OVERLAP ANGLE AND CONTINUOUSLY

SEAL AGAINST ANGLE

METER BOX

HEAD DETAIL

METER BOX

SILL DETAIL

LINTEL

TEMPORARY

PACKERS

INTERNAL

LINING

IF REQUIRED,

ARE TO BE

REMOVED

AFTER FIXING

SILL PLATE

PACKERS

88

DO NOT GUN NAIL FIX


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Scale Date


Meter Box - Head & Sill Details 1 : 2 June 2021

SW.4.11

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



SHERA WEATHERBOARD



IS FIXED


FLASHING TAPE, REFER E2/AS1 FIG 72B

TIMBER SCRIBER SEALED AGAINST

WEATHERBOARD AND METER BOX

LINE OF HEAD FLASHING ABOVE


PACKERS

min. 20mm COVER

METER BOX

SEAL AND RIVET ANGLE TO ALL SIDES

OF THE METER BOX

INTERNAL

LINING

8




NOTE 1 & TABLE 3

DO NOT GUN NAIL FIX


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Scale Date


Meter Box - Jamb Detail 1 : 2 June 2021

SW.4.12

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others

DO NOT GUN NAIL SHERA

WEATHERBOARD !

WALL UNDERLAY


FACE FIX SHERA WEATHERBOARD WITH

JOLT HEAD NAILS. REFER TO NOTE 1 &

TABLE 3



IS FIXED

SHERA WEATHERBOARD

SEALING GROMMET (BRANZ APPRAISED)

OR FLASHING TAPE ALL AROUND

-CHECK COMPATIBILITY WITH WALL

UNDERLAY

TIMBER PACKER - TOP EDGE FITTED

TIGHTLY TO THE UNDERSIDE OF THE

BOARD ABOVE

SUITABLE BACKING ROD AND

EXTERIOR SEALANT TO THE DIAMETER

OF THE PIPE FLANGE AND TO THE

FACE OF THE TIMBER PACKER AS A

WEATHER AIR SEAL

PIPE PENETRATION

SLOPING TO OUTSIDE

FLANGE PLATE

SEALANT TO THE GAP BETWEEN

CIRCULAR PIPE FLANGE AND PIPE

AIR SEAL

AS PER

E2/AS1

9.1.6

INTERNAL

LINING

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Scale Date


Service Cable / Pipe Penetration Detail 1 : 2 June 2021

SW.8.01

Step 1: Tacking




board.


Step 2: Face Fixing


centres.







SS Jolt Head Nail

Flexible Wall

Underlay

Rigid Wall Underlay

max. 9mm



Supplied by Pacbld

Key:

By Others


3 Installation Guide The methods selected for this guide are based on experience from sites & have proven to give the best results. The sequence of the work steps as well as their implementation may vary due to different building situations.

3.1 Timber Framing ▪ Confirm that substrate is timber framing treated as required by NZBC B2/AS1 and built to NZBC B1/AS1.

▪ Check waterproofing membrane is installed in place and if necessary, recessed into framing to reduce bulking.

▪ Intermediate studs at max. 600mm centres and nogs at max. 800mm centres.

▪ Check alignment of framing i.e. studs & nogs straight and true, upper framing aligning with lower framing.

▪ Check for double studs at window/door openings & internal corners.

▪ Check additional framing is added around penetrations for support, if required.

▪ Ensure the moisture content of the timber framing is to NZS 3602 requirements, i.e. max. moisture content of 24% when cladding is installed. If weatherboards are fixed to framing with higher moisture content, problems may occur later due to excessive timber shrinkage.

3.2 Wall Underlay ▪ A flexible or rigid wall underlay, that meets NZBC E2/AS1 Table 23, must be installed as per E2/AS1 Paragraphs 9.1.5-

9.1.7 behind the Shera Weatherboard cladding

▪ Confirm wind zone is within NZS 3604. If Extra High wind zone, a rigid wall underlay is required. Refer E2/AS1 Clause 9.1.7.2

▪ The selected wall underlay must be installed as per the underlay manufacturer’s instructions prior to the installation of the cavity battens and Shera Weatherboard cladding.

3.2.1 Flexible Wall Underlay

▪ Install as per the flexible wall underlay manufacturer’s instructions and E2/AS1 Paragraph 9.1.7.1.

3.2.2 Rigid Wall Underlay

▪ Shera RWU (Rigid Wall Underlay) 6mm or 9mm can be used as a rigid wall underlay behind Shera Weatherboard cladding. Refer to the Shera RWU manual for more information.

▪ If another rigid wall underlay is used, install as per the selected rigid wall underlay manufacturer’s instructions and E2/AS1 Paragraph 9.1.7.2.

3.3 Opening Preparations, Joinery & Flashings ▪ Shera Weatherboard is to be used with aluminium window and door joinery that is installed with vertical jambs and

horizontal heads and sills that meets the requirements of NZS 4211 for the relevant Wind Zone.

▪ Prior to window/door installation, any wall openings must be flashed as per E2/AS1 Paragraph 9.1.5 and as per the selected wall underlay and tape manufacturer’s instructions. Ensure a continuous seal is achieved and all exposed wall framing in the opening is protected.

▪ Ensure any head or inter-storey flashings are installed prior to cavity battens and are sealed with a flexible flashing tape, or additional layer of wall underlay over the upstand, refer E2/AS1 9.1.10.3.

▪ At window/door heads, check head flashings incorporate 10mm turn-ups as stop ends and extend 30mm past joinery.

▪ For very high and extra high wind zones, seal head flashing to the top edge of the window joinery.

▪ Install Meterbox, seal and rivet angle to meterbox and to head flashing, as per E2/AS1 Fig. 69. Also, refer to details PSL.4.11 & 12.

▪ If Aluminium flashings are installed against timber battens, ensure separation is created between dissimilar materials, i.e. Flashing tape or PVC Duct tape.



3.4 Cavity Closer ▪ A cavity closer (vermin-proofing) shall be installed, as per E2/AS1 Paragraph 9.1.8.3, above window/door heads and at

the base of the drained cavity. Cavity closer must be positioned to allow a min. drip edge to bottom edge of Shera Weatherboard; 10mm at base of walls and 15mm above window/door head flashings.

▪ Selected cavity closer must include holes/slots to provide a min. ventilation opening are of 100mm2 per lineal metre of wall. It is important the holes/slots in cavity closer are kept clear and unobstructed to maintain draining and venting of the cavity.

3.5 Cavity Battens ▪ Timber cavity battens shall be as per E2/AS1 Paragraph 9.1.8.4, be nominal 20mm thick, min. 45mm wide and min.

H3.1 treated as per B2/AS1 1D.10 durability requirements.

▪ Battens will be fixed by the Shera Weatherboard fixings, which will penetrate the wall framing. Therefore, the battens will only need to be temporarily tacked on, until the weatherboard is fixed.

▪ Previously, Shera Weatherboard System used structural cavity battens to reduce the fixing nail length. With this current Shera Weatherboard manual, the batten is no longer a structural component and is only a “packer” to provide the required ventilation gap between the wall underlay and weatherboard cladding.

▪ At Mid-Floor or Inter-storeys, there must be a break in the cavity battens to act as a control joint, to match the inter-storey drift demand of the project or the rigid wall underlay control joint. Nominal break min. 20mm.

3.6 Cant Strip ▪ Install Cant strip (H3.1 treated timber) horizontally behind the first / lowest weatherboard to ensure the

weatherboards are set at the correct angle. The cant strip must be continuous around the perimeter of the building. Cant strip are also required above window/door heads.

▪ Cant strip are required at mid-floor or inter-storey junctions to start weatherboard and provide support when weatherboards are fixed in the middle. Refer details PSL.3.02 & 03.

▪ Cant strip may be omitted if the selected cavity closer includes a lip that functions as a cant strip to help set the weatherboard at the correct angle.

3.7 Clearances ▪ Ensure ground clearances are maintained as per NZBC E2/AS1, Table 18. The bottom edge of the first/lowest Shera

Weatherboard must finish min. 100mm clear of paved surfaces or min. 175mm clear of unpaved surfaces. The ground clearances to finished floor levels as set out in NZS 3604 must be adhered to also. At balcony, deck or low pitch roof/wall junctions, the bottom edge of weatherboards must finish min. 35mm clear of finished surface or roof flashing.

3.8 Weatherboard Setout ▪ Shera Weatherboard must have a min. lap of 30mm. A storey rod is recommended to keep all laps and cover

consistent.

▪ The first/lowest weatherboard must over sail the bottom plate by 50mm.

▪ The weatherboards should be set out so as close to a full board, as possible, will finish under and over windows/doors, at inter-storey drained joints and at the top of the wall.


3.9 Fixings ▪ Shera Weatherboard are face fixed through the cavity battens and wall underlay, into the framing at max. 600mm

centres. To ensure the min. framing penetration is achieved, as per E2/AS1 Table 24, please refer to Table 4 below to select the correct nail length for the project.

✓ ALWAYS install dry Shera Weatherboard.

✓ ALWAYS pre-drill nail holes in weatherboard, to suit diameter of selected nail size.

✓ ALWAYS hand nailed.

✓ ALWAYS be face fixed.

✓ ALWAYS start working from the lowest weatherboard.

✓ CAN first tack on the weatherboards to hold in place until face fixed.

DO NOT gun nail fix weatherboards.

Concealed fixing is not an option.

Table 4: Shera Weatherboard Fixings – over Standard Cavity Battens

Fixing method Wind Zone

(as per NZS 3604)

Wall Underlay

Specified Fixing Installation

Step 1:

Tacking1 n/a n/a

50 x 2.8mm SS Jolt head nails

Pre-drill Ø3.0mm hole

Fix into studs only at each end and one centrally for tacking.

Fixed 20mm from top edge of lower board.


Step 2:

Face Fixing2

Up to and including Very High Wind Zone

Flexible underlay

90 x 3.55mm SS Jolt head nails

Pre-drill Ø3.5mm hole Fix into studs only, at maximum 600 centres.

Fixed 20mm from bottom edge of top board through both thicknesses.

Punch jolt head 2mm below the surface of the board and fill.

Rigid wall underlay 3

100 x 4.0mm SS Jolt head nails4

Pre-drill Ø4.0mm hole Extra High Wind Zones

Note:

(1) Tacking are only to hold Shera Weatherboard in place until face fixing.

(2) Shera Weatherboard must ALWAYS be fixed with face fixings at every stud, max. 600mm centres.

(3) Shera RWU (rigid wall underlay) 6mm or 9mm can be used as per E2/AS1 9.1.7.2. a) and must be over-fixed with a self-adhesive underlay that meets NZBC E2/AS1 Table 23 requirements.

(4) If selected Rigid Wall Underlay is more than 9mm thick, the nail length must be increased to ensure minimum 35mm penetration into framing as per E2/AS1, Table 24.

(5) Position fixings min. 20mm from the ends of the board. At corners, min. 100mm at external and min. 50mm at internal corners.

(6) ALWAYS hand nailed. DO NOT use gun nails!



3.10 Joints: ▪ Shera Weatherboard joints must be installed as per E2/AS1 Paragraph 9.5.3.2:

a) Joints shall be positioned between studs, min. 100mm away from timber stud.

b) Stagger joints at a min. 600mm from joints in the adjacent boards.

c) Weatherproof joints with a hidden Shera Weatherboard Back Soaker, with sealant applied between ends of the boards.

▪ Ensure a paintable flexible sealant that meets E2/AS1 requirements is used and apply sealant as per the manufacturer’s instructions.

▪ Best practice when installing joints is to run a continuous bead of flexible sealant along the edge of the first weatherboard and then butt the next weatherboard against the applied sealant. Leave the sealant proud and allow it to completely cure before trimming off. This ensures sealant is applied all the way to the back of the soaker.

10.1 Corners

At Internal Corners:

▪ Square cut weatherboard ends and butt against one-piece corner flashing. Refer detail PSL.2.01.

▪ A continuous bead of flexible sealant can be applied between weatherboard and flashing.

▪ Pacific Build Supply Ltd do not supply an internal corner flashing.

At External Corners:

▪ a) Aluminium Corner Soaker - Mitre cut weatherboards and fix Shera Weatherboard Corner Soaker with 40 x 2.8mm stainless steel flat head nails at the top in the pre-punched holes. Ensure soaker cover over weatherboards min. 15mm. Refer detail PSL.2.06.

▪ b) Boxed Corner - Square cut weatherboards and cover with either Timber cover boards with timber scribers. Cut scribers to suit weatherboard and embed with flexible sealant. Pre-drill holes in weatherboards before fixing through. Refer detail PSL.2.07.

3.10.2 Floor Levels (Inter-storey Junction and Mid-Floor)

▪ When the cladding is continued over 2-storeys or over 7 metres, an inter-storey flashing must be provided to limit continuous cavities and to direct any moisture to the outside, as per NZBC E2/AS1, Paragraph 9.1.9.4 (b) requirements. Refer detail PSL.3.03. The inter-storey flashing is supplied by others.

▪ At mid-floors where an inter-storey flashing is not required, ensure the top weatherboard that is bridging the batten gap is not fixed to two separate battens. This allows for inter-storey movement. Refer detail PSL.3.02.

3.11 Pipes and Service Penetrations ▪ Ensure all pipes and penetrations have been sealed as per NZBC E2/AS1, Paragraph 9.1.9.3.

▪ Alternative BRANZ Appraised products can be used in place of flashing tapes around the penetrations, i.e. Kaflex and Roflex Grommets. Install these products as per manufacturer’s instructions.

▪ Best practice to combine both flashing tape and flange plate options for double the defence, refer detail PSL.8.01 and BRANZ Build 173 Article - Pipe penetration through exterior bevel-back weatherboard cladding.


3.12 Protective Coating ▪ Shera Weatherboard must be finished with a protective coating as per E2/AS1 Paragraph 9.5.6 and to comply with

NZBC B2 durability requirements.

3.12.1 Preparation

▪ Clean and prepare nail holes, then fill any holes with an exterior use filler, e.g. External Contract Filler or Epoxy Fairing Cream. Allow the product to completely cure and then scrape flush with a linbide scraper.

▪ Ensure the filler product is sanded to finish level with the weatherboard surface, ready for painting.

3.12.2 Painting

▪ Weatherboards must be clean and dry before commencing painting. It is the painter’s responsibility to ensure the surface is properly prepared for painting.

▪ Surface preparation may vary depending on selected paint system, always refer to the paint manufacturer’s instructions before starting painting.

▪ All exposed faces, including top edges at sills and all bottom edges of weatherboards and accessories must be finished with a min. 2-coat latex exterior paint system complying with AS 3730. One coat of contract primer, compatible for fibre cement and the selected paint, must be applied prior to the 2-coat paint finish.

▪ For long-lasting performance and beauty, the weatherboards should be painted immediately after the installation or within 90 days of installation.

▪ In harsh exposed environments special paints/coatings may be required for better performance. Refer to paint manufacturers for more information.

▪ An advantage fibre cement weatherboard has over timber weatherboards is that there is no restriction on the Light Reflectance Value (LRV) on the paint to be applied. Therefore, dark coloured paints can be used on weatherboards. Compared to light colours, dark colours may fade over time in certain environments, may require more maintenance.

▪ Paint systems are not supplied by Pacific Build Supply Ltd and have not been assessed, therefore are outside the scope of this manual and the BRANZ Appraisal.



4 Maintenance Regular maintenance is essential for the Shera Weatherboard cladding to continue to meet the NZBC durability performance requirements and to maximise their serviceable life. Listed below are what basic maintenance tasks shall include but not limited to.

Building owners are responsible for the maintenance of the Shera Weatherboard cladding as per the instructions of this manual or specific project specification.

Annual periodic clean

All facades should be annually cleaned to avoid unnecessary and high maintenance costs. As when soiling stays on a surface for longer periods of time, removal and cleaning will become increasingly more complicated.

✓ Can wash with a garden hose or high-pressure cold water for dirty surfaces caused by environmental conditions.

✓ For normal stains – can wash with warm water mixed with a mild household detergent or soft soap solution, using a soft and clean cloth, followed by rinsing with plenty of clear water afterwards.

Refer to the selected Paint manufacturer’s instructions for cleaning requirements.

Always patch test a small part of the affected area first, and once the effectiveness of the cleaning method is shown, proceed with the rest of the surface.

DO NOT waterblast cladding!

NEVER use caustic, abrasive or solvent containing cleaning agents!

NEVER wash panels in direct sun light with alkaline or acid cleaners, as may cause irreversible stains.

Annual Shera Weatherboard cladding inspection

An annual inspection of the cladding should be undertaken at the same time as the annual clean to ensure that all aspects of the cladding remain in a weatherproof condition.

Checklist:

Ensure min. ground clearances are maintained at all times during the life of the cladding as per the NZBC E2/AS1 requirements.

Ensure ventilation and drainage holes above windows, doors and soffit junctions are kept clear.

Visually inspect nail fixing holes and re-apply finishing compound to punched nail holes that are showing evidence of peaking.

Check stop end flashings around decks and windows and report any adhesion failures of sealants.

Check parapet flashings and report any damage.

Re-apply sealants to flashings at any sign of cracking or delamination, refer to sealant manufacturer’s instructions.

Refer to the selected Paint manufacturer’s instructions for recoating frequencies and requirements. Approximately recoated at 7-10 yearly intervals.

Health and safety – When Cleaning:

• Wear appropriate protective equipment, which may include gloves, eye protection and respirators.

• At all times, read the product manufacturer’s instructions or safety label before using the product.

• For the cleaning products: avoid breathing vapour, keep out of reach of children, use with adequate ventilation, do not drink or consume foods while using the cleaning products.


5 Product Order List Products supplied by Pacific Build Supply Ltd are:

Shera Weatherboard (Plank) [Bevel-backed Weatherboards]

Image Pacbld Code Description Unit Enter Qty Required

PBS4071 Shera Weatherboard 180

180mm wide x 15mm thick, 4200mm long. Max. 144 lengths per pallet.

Each

Accessories for 180 Shera Weatherboard

PBS0554 Shera Weatherboard Back Soaker Joiner

70mm wide. Aluminium Mill Finish. Used for connecting the weatherboards off stud. Ref: PSL.1.11 as per the manual.

Each

PBS0602 Shera Weatherboard Corner Soaker

Aluminium Mill Finish. Used to cover mitre cut weatherboards at external corners. Ref PSL.2.06 as per the manual.

Each

Accessory products supplied by the Pacific Build Supply Ltd or building contractor are:

Accessories

Fixings Image Pacbld Code Description Unit Enter Qty Required

PBS0610 SS 75mm x 3.15mm jolt head (1kg box) Can be used for tacking weatherboards in place.

Ø3.0mm Holes must be predrilled.

Box

PBS0611 SS 90mm x 3.55mm jolt head (1kg box) Used for fixing weatherboards that only require a flexible wall underlay. Ø3.5mm holes must be predrilled.

Box

PBS0613 SS 100mm x 4.0mm jolt head (1kg box) Used for fixing weatherboards that require a rigid wall underlay. Ø4.0mm Holes must be predrilled.

Max. 9mm thick, if underlay thickness increases, nail length also increases.

Box

Tape and Sealant

PBS0514 PVC Duct Tape

70mm x 30m. Used as separation between dissimilar materials, i.e. timber battens and Aluminium flashings.

PBS4012 Sika AT-Facade 600ml

Grey Sausage. Used at weatherboard joints to seal join. Branz Appraisal 613.

20 Sausages per box.

Per Sausage

PBS4013 Sika AT-Facade 600ml

White Sausage.

Per Sausage

Flashing Components

PBS0533 Air Seal Flashing

50mm x 2400mm long. Mill Finish. Air seal flashing is used to seal at framing line to masonry.

Each

PBS0464 Air Seal Flashing

70mm x 3000mm long. Mill Finish.

Each



Trims

PBS4022 Shera Refined

15mm x 2400mm x 1200mm. Used for the purpose of cutting external boxed corner trims. Purchase a full sheet and cut to suit on site.

Each

Custom Trims cut to required width is available, contact Pacbld with your required dimensions for pricing.

Accessory products supplied by the building contractor are:

Wall Underlay Flexible Wall Underlay

To comply with NZBC E2/AS1, Table 23 or covered by a valid BRANZ Appraisal.

Flexible Wall Underlay Support

19mm wide polypropylene tape to support flexible underlay between studs.

Rigid Wall Underlay

To comply with NZBC E2/AS1, Table 23 or covered by a valid BRANZ Appraisal. Shera RWU supplied by Pacific Build Supply Ltd is suitable for use as a Rigid Wall Underlay behind the Shera Weatherboard cladding. Please refer to the Shera RWU Manual for more information.

Flexible Sill and Jamb Flashing Tapes

Flexible flashing tapes to comply with NZBC E2/AS1 Paragraph 4.3.11 or covered by a valid BRANZ Appraisal.

Other Accessories Timber Cavity Battens

Min. H3.1 Treated Timber as per NZBC B2/AS1.

Be nominal 20mm thick, min. 45mm wide.

Cavity Closer

Suitable for nominal 20mm cavity depth.

To comply with NZBC E2/AS1 clause 9.1.8.3 or covered by a valid BRANZ Appraisal.

Cant Strip

H3.1 Treated Timber Cant strip to start first/lowest weatherboard at correct angle.

Scribers

H3.2 Treated Timber cut to suit the finished weatherboard profile.

To be pre-primed prior to installation.

Inter Corner Flashing - 90° internal ‘W’ flashing

With Hem and min. 50mm cover. Refer detail PSL.2.01

Timber Cover Boards

For External Boxed Corners. Refer detail PSL.2.07.

Window and door trim cavity air seal

Air seals complying with NZBC E2/AS1, Paragraph 9.1.6 or covered by a valid BRANZ Appraisal suitable for use around window, door and other wall penetration openings. Refer window details PSL.4.01-03.

Aluminium joinery head flashings

As supplied by the joinery manufacturer or contractor, as per E2/AS1 requirements.

Any custom flashings

Material selected and installed as per NZBC E2/AS1.


6 Product Warranty Must be read in conjunction with “Shera Fiber Cement Plank 15 Years Transferable Product Warranty”.

Terms and conditions of Pacific Build Warranty for Shera Weatherboard (Shera Plank):

1. This warranty is limited to the specific Shera Weatherboard products supplied by Pacific Build Supply Ltd. The warranty period is for fifteen years from practical completion and warranties that the Shera Weatherboard products will meet the relevant clauses of the NZBC for; B1 Structure; B2 Durability; E2/AS1 External Moisture; and F2 Hazardous Building Material for a building element with normal maintenance requirements as defined in the Shera Weatherboard Maintenance schedule.

2. The warranty guarantees the fitness of purpose of the products supplied for the contract in accordance with the Shera Weatherboard specification, technical detail sheets and other written instructions supplied by Pacific Build Supply Ltd. This warranty is specific to the Shera Weatherboard products nominated.

3. The warranty is not an application or workmanship guarantee which is the responsibility of the applicator.

4. Any work to the finished surfaces or alteration of the end use of the structure requires prior written approval from Pacific Build Supply Ltd.

5. There shall be no liability for Pacific Build Supply Ltd in respect of damage to or deteriorations in performance of the product caused by acts of God, exceptional weather conditions, earthquakes, fire or riot, vandalism, damage caused by objects dropped from above, bursting or other forms of destruction or failure of gas or fluid carrying pipes or other vessels, electrical faults, negligence or damage by the main contractor, Owner/occupier of the building and/or visitors to the building on which the products are applied or any criminal act, or any damage from mechanical causes and spillage of harmful substances to products surfaces. There will be no liability for consequential damage or defects arising from or in any way attribute to poor workmanship, poor design, settlement or structural movement and/or movement of products to which the product is attached or thermal stress fractures / damage caused by the light reflectance value of the coating colour selected being less than the specified value for the cladding system. Note; where the nominated colour is selected below the specified LRV any defects attributable to thermal stress are the responsibility of the owner.

6. In the event that faulty products have been supplied, on receipt of evidence to the satisfaction of Pacific Build Supply Ltd of such a fault it will remediate by replacing or rectifying the products, and will appoint a qualified applicator to undertake such work at its expense. Pacific Build Supply Ltd will not be liable for consequential damages, and its obligation is to remediate and repair so that the original warranty period and performance is met.

7. In the event of a dispute arising from the interpretation or action regarding the warranty the decision of a mutually accepted arbitrator will be final and binding.



Notes



Notes


Notes


Documents

The application: Shera Weatherboard (Plank) Technical Manual