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Masons Intertenancy Wall System
Description

The Masons Intertenancy Wall System is a simple and flexible acoustic and fire-rated wall system based on tried-and-true materials for faster construction. 

The system is based on Masons Enviro AAC (autoclaved aerated concrete) panels – a dense yet lightweight material with proven acoustic and fire-stopping performance. The system is easy to work with, giving builders workflow flexibility and construction efficiencies. It is fully NZBC compliant for both fire resistance (FRR) and sound transmission (STC).

The Masons Intertenancy Wall System is based on Masons Enviro™ AAC panel — a 50 mm thick panel tested to, and compliant with AS/NZS1530.1. It is manufactured from cement, sand, lime and water which is aerated with an expanding agent. Soft blocks are molded from the mixture and then sliced into the required panel size and cured in a steam pressure autoclave for up to 12 hours.

Key Features
  • Exceeds code — fully FRR & STC compliant
  • Fast — designed for buildibility
  • Simple — easy to use, flexible and fast

The system comprises:

  • 10mm thick plasterboard
  • 90mm deep timber framing or 92mm deep steel framing
  • 75mm R2.0, non-combustible, moisture-resistant, non-corrosive, mildew-proof mineral wool insulation
  • 20mm minimum air gap
  • 50mm Masons Enviro™ AAC panel
  • 20mm minimum air gap
  • 75mm R2.0, non-combustible, moisture-resistant, non-corrosive, mildew-proof mineral wool insulation
  • non-combustible, moisture-resistant, mineral wool insulation for the top of the wall

 

Scope of Use

For scope of use, limitations, conditions and statement of building code compliance, refer to the Masons Intertenancy Wall System PASS Product Statement.

Simple — easy to use, flexible and fast:

The Masons system is construction friendly and designed for simplicity and flexibility. As few as two builders can install the system, and installation can be flowed around other work on-site. No weather protection is needed for the AAC panels when work stops, making on-site storage simple.

Fast — designed for buildability:

The system can be installed up to three stories continuously, without interruption, and there is often no need for extra accessories or fiddly work at mid-floors junctions. Services can be run down the framing on either side of the AAC panels, and materials are carried in smaller parts when site access is difficult. The ACC system is easier for everyone on the job. 

 

Limitations on Use

Penetrations to the Masons Intertenancy Wall System: fire and acoustic must be engineered for fire rating and to preserve acoustic performance and installed by suitably qualified persons. 

Statement of Building Code Compliance

Exceeds code — fully FRR & STC compliant:

  • This system meets and/or exceeds the New Zealand Building Code's minimum requirements for both fire resistance rating and sound transmission class.
  • It scored a rating of -/120/120 for walls up to 10 m high. FRR -/120/120 fotimber frame, and -/90/90 for light steel framing.
  • Acoustic engineers Marshall Day reported a lab performance of 64 dB — higher than the minimum STC requirement of 55 dB for intertenancy walls.

For scope of use, limitations, conditions and statement of building code compliance, refer to the Masons Intertenancy Wall System PASS™.

 

 

Other Performance Attributes

 

 

Simple — easy to use, flexible and fast

The Masons system is construction friendly and designed for simplicity and flexibility. As few as two builders can install the system, and installation can be flowed around other work on-site. No weather protection is needed for the AAC panels when work stops, making on-site storage simple.

 

Fast — designed for buildibility

The system can be installed up to three stories continuously, without interruption, and there is often no need for extra accessories or fiddly work at mid-floors junctions. Services can be run down the framing on either side of the AAC panels, and materials are carried in smaller parts when site access is difficult. The ACC system is easier for everyone on the job. 

* Penetrations to the Masons Intertenancy Wall System: fire and acoustic must be engineered for fire rating and to preserve acoustic performance and installed by suitably qualified persons. 

Documents
Design Guide

v1.1

PASS Product Statement:

19164

Specification Guide

v1.0

Installation Guide

v3.1

Warranty
Brochure

2023

CAD/PDF Details
Panel Setout: Enviro AAC 50mm
Masons IT Wall System

ITW01 - ITW12

Since being established in 1999, Masons has become a key supplier in the New Zealand building industry, offering a variety of quality products and tools for a whole range of building requirements.

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