MASONS Intertenancy Wall System Installation Guide

MASONS INTERTENANCY WALL SYSTEM
INSTALLATION GUIDE
V1.0 December 2021

General and product information

PURPOSE
This guide relates to the installation of the Masons Intertenancy Wall System.
IMPORTANT DOCUMENTS
This guide must be read in conjunction with:

• Masons Intertenancy Wall System pass™
• Masons Intertenancy Wall System Specification Guide
• the relevant Masons Intertenancy Wall System details
• Masons Intertenancy Wall System Warranty
• NASH Standard Part 2: May 2019 Light Steel Framed Buildings
• NZS 3604: Timber-framed buildings.

SKILLS REQUIRED
This guide is suitable for use by a licensed building practitioner licensed to the relevant class or by a practitioner who will be supervised by a licensed building practitioner
licensed to the relevant class or deemed LBP.
FOR MORE HELP
Technical assistance is available at www.mpb.co.nz.
While all reasonable efforts have been made to ensure the accuracy of information provided, this guide is a guide only. It may be subject to change.
FOR OUR WARRANTY
Refer to www.mpb.co.nz.
PRODUCT DESCRIPTION
The Masons Intertenancy Wall System is an intertenancy acoustic and fire wall system:

NOTE

• 90 mm timber framing or 92 mm steel framing

• 75 mm R2.0, non-combustible moisture-resistant, non-corrosive, mildew proof insulation.
  Where acoustic performance required a minimum density of 9kg/m 3  applies.

• 50 mm Masons Enviro™ AAC panel

The Masons Enviro™ AAC panel is a 50 mm thick AAC panel, manufactured from cement, sand, lime and water and aerated by the addition of an expanding agent. Soft blocks are moulded using the mixture and then sliced into the required panel size and cured in a steam pressure autoclave for up to 12 hours.
The Masons Intertenancy Wall System has a fire rating of 90/90/90 and an estimated laboratory acoustic STC performance of 64 dB.
SCOPE AND LIMITATIONS
For scope of use, limitations, conditions and statement of building code compliance, refer to the Masons Intertenancy Wall System pass™.

Pre-installation

HEALTH AND SAFETY
Take all necessary steps to ensure your safety and the safety of others:

• ensure mechanical ventilation is used when cutting or drilling
• ensure the timber and steel are well supported when cutting and fixing
• wear appropriate safety equipment, clothing and footwear
• use all tools in accordance with relevant instruction manuals
• plan and monitor a safe approach for working at height; select and use the right equipment
• designate a disposal area for all sharp metal off-cuts
• clear the work area of any obstruction before work starts.

For further information refer to:

• WorkSafe. [July 2018] Small Construction Sites, the Absolutely Essential Health and Safety Toolkit.
• WorkSafe. [December 2016] Health and Safety at Work, Quick Reference Guide.

These documents are available at www.worksafe.govt.nz.
HANDLING AND STORAGE
Correct handling and storage of Masons Intertenancy Wall System components are critical for best performance, ease of use and warranty adherence.
Handling
Lift Masons Enviro™ AAC panels by the long edge, carrying a panel between two people. Unload panels as close as possible to the installation area. Use trolleys or other
mechanical devices where this is not possible. Take care handling the panels to avoid damage to edges and surfaces.
Other products must be handled in accordance with the component product manufacturer or supplier requirements.
Storage
Masons Enviro™ AAC panel packs must only be stacked one pack high and must be properly supported on level ground.
Mineral wool insulation and Masons Enviro™ AAC adhesive mortar must be stored dry and covered.
Other products must be stored in accordance with the component product manufacturer or supplier requirements.
TOOLS AND EQUIPMENT REQUIRED
Install the Masons Intertenancy Wall System using standard carpentry tools and equipment. a diamond-impregnated cutting blade and a sabre/reciprocating saw with
demolition blade.
Use tools in accordance with good trade practice and supplier’s instructions.
Use protective equipment when cutting panels, as Masons Enviro™ AAC panels contain crystalline silica or silica dust. Equipment must include P1 or P2 dust masks, protective glasses or goggles, earplugs or earmuffs, gloves, long sleeves, pants and protective footwear.
COMPONENTS
The following components are required:

• Masons 50 mm thick Enviro™ AAC panel
• Masons Enviro™ AAC adhesive mortar
• Masons 1.5 BMT 75 mm x 45 mm x 50 mm aluminium angle bracket
• Masons 0.55 BMT 51 mm x 35 mm galvanised steel H-jointer
• Masons 0.55 BMT 51 mm x 35 mm galvanised steel C channel
• 75 mm R2.0, non-combustible, moisture-resistant, non-corrosive, mildew-proof mineral wall insulation
• 90 mm deep timber framing
• 92 mm deep steel framing
• 10 mm thick plasterboard
• Non-combustible, moisture-resistant, mineral wool insulation for the top of the wall
• 12 g x 45 mm Hex head SDS Type 17, Class 3 screws (angle bracket to Masons Enviro™ AAC panel)
• 12 g x 20 mm Hex head self drilling, Class 3 screws (angle bracket to steel framing)
• 12 g x 35 mm Hex head Type 17 self drilling Class 3 screws (angle bracket to timber framing)
• Fire retardant sealant
• Corrosion protection touch up paint.

Installation

PREPARATION

Step 1:| Building consent documentation
Access and view the building consent documentation.
Ensure NZS 3604:2011 and NASH Standard Part 2: May 2019 Light Steel Framed Buildings are available for reference.
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Step 2:| Primary structure (excluding Masons Intertenancy Wall System)
Ensure the framing of the primary structure is straight and true and within framing tolerances as described in section 2 and Table 2.1 of NZS 3604:2011 or section 2.5 and Appendix A of NASH
Standard Part 2: May 2019 Light Steel Framed Buildings.
Step 3:| Prepare Masons Enviro™ AAC panels
Masons Enviro™ AAC panels can be cut to the required length using power or hand tools with a diamond-impregnated cutting blade.

INSTALLATION

Step 1:| Details
Access and view the relevant Masons Intertenancy Wall System
details in the building consent documentation or from Masons
Plastabrick [link to details button].
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Step 2:| Install first wall frame
The Masons Intertenancy Wall System has one wall frame on each side of the Masons Enviro™ AAC panel.
Install one of the wall frames. Ensure the framing is straight and true and within framing tolerances as described in section 2 and Table 2.1 of NZS 3604:2011 or section 2.5 and Appendix A of NASH
Standard Part 2: May 2019 Light Steel Framed Buildings.
Install temporary bracing to the wall to keep the wall straight and plumb during installation of the Masons Enviro™ AAC panels.
Check the building consent plans for any applicable building services. Services may be run in the gap between the Masons Enviro™ AAC panel and the framing, but the services must not
touch the panel or the brackets to ensure sound transfer is prevented.
Penetrations are not permitted unless these are specifically fire engineered.
Step 3:| Install Masons Enviro™ AAC panels
Install base panel
Ensure installation allows for the 20 mm air gap to be maintained.
Check framing to ensure that any deviations from the vertical do not reduce the size of the air gap.
Fix aluminium angle brackets, starting at one end of the wall.
Fix brackets every 3 m vertical height and at 400 mm horizontal centres for maximum wall height of 6.6 m and every 250 mm horizontal centres for maximum wall height of 10 m. On end studs,
install two brackets per panel.
Fix using:
› 12 g x 20 mm Hex head self drilling, Class 3 screws to steel framing or
› 12 g x 35 mm Hex head Type 17 self drilling Class 3 screws to timber framing.
Temporary brackets can also be installed for support during installation, one stud back from the end of the panel at the panel centre height.
Install C channel to the end of the wall using angle brackets.
Install C channel to the slab using a bed of Masons Enviro™ AAC adhesive mortar on the slab or fix C channel tracks using 50 mm concrete nails at a maximum of 1200 mm centres.
Ensure the C channel is level pack with ‘H packers’ where required.
Insert panel into C channels ensuring panel is level. Fix to angle brackets using 12 g x 45 mm Hex head SDS Type 17, Class 3 screws.
Apply a bead of fire retardant sealant along the outer junction of the base channel and the floor.
Install upper panels
Apply 2 mm–3 mm thick Masons Enviro™ AAC adhesive mortar to the edge of the base panel. Install the next panel on top of the base panel slotting into the C channel. Temporarily fix the panel
to the frame using an angle bracket. Ensure panels are joined as close as possible and sealed with Masons Enviro™ AAC adhesive mortar.
Continue to install panels in a stack bond configuration.
Install H-jointer
Insert one side of H-jointer to the end of the installed stacked panels.
Fix the H-jointer to the frame by installing aluminium angle brackets at the top plate and bottom plate of the wall.
Install remaining stacks of panels
Install remaining stack of panels, fitting panels into the C channel and the H-jointer, ensuring panels are joined as close as possible and sealed with Masons Enviro™ AAC adhesive mortar.
Install H-jointer between stacks and a C channel at the end of the wall.
Step 4:| Install second wall frame
Install the second wall frame. Ensure the framing is straight and true and within framing tolerances as described in section 2 and Table 2.1 of NZS 3604:2011 or section 2.5 and Appendix A of NASH
Standard Part 2: May 2019 Light Steel Framed Buildings.
Ensure the air gap of 20 mm has been maintained. Adjust the framing if necessary.
Check the building consent plans for any applicable building services. Services may be run in the gap between the Masons Enviro™ AAC panel and the framing, but the services must not
touch the panel or the brackets to ensure sound transfer is prevented.
Step 5:| Install insulation
Install insulation in accordance with the selected insulation supplier’s requirements. Cut to fit size and install strapping where required to ensure the insulation does not bulge out into the air void.
Step 6:| Install plasterboard
Install plasterboard in accordance with the selected plasterboard supplier’s requirements.
Check the building consent for any wall bracing requirements.
Plasterboard fixing may vary depending on wall bracing or a nonbracing design.
Step 7:| Install insulation to top of wall
Install non-combustible, moisture-resistant, mineral wool insulation to the top of the wall to fill the voids within the roof capping and junction of the intertenancy wall.

DISPOSAL OF WASTE

Enviro™ AAC panel should be disposed of at a concrete recycling facility.

COMPLETION

Check to ensure all components and the required number are installed correctly and in accordance with Masons Intertenancy Wall System requirements.
Complete the Masons Intertenancy Wall System Installation Record. [link] Ensure all information is available for the building owner to maintain the Masons Intertenancy Wall System, including information from the selected plasterboard supplier.

MAINTENANCE

The Masons Intertenancy Wall System requires minimal maintenance. Maintain the plasterboard in accordance with the selected plasterboard supplier’s requirements.

This document is uncontrolled in printed form.
See www.mpb.co.nz for current version. Copyright © 2021 Masons.
info@mpb.co.nz
0800 522 533
www.mpb.co.nz

References

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