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Partiwall Intertenancy System

USG Boral Partiwall is an intertenancy solution for separating walls between attached dwellings.

Partiwall is a twin stud wall system, which incorporates a single or double layer of 25mm Shaftliner plasterboard fire barrier panels within the wall cavity. Shaftliner panels are held in position by lightweight steel H- or I-section studs. Installation of Shaftliner fire barrier is carried out during the framing stand and does not require plasterboard screw fixing, jointing, or finishing. The internal wall linings are installed at the plastering stage using conventional installation methods.

Partiwall permits easy incorporation of services and does not require penetration and perimeter treatment associated with traditional fire-rated systems.

Partiwall was developed to suit the normal pattern of construction and follow-up trades.

Key Features
  • Cost-effective and fast to construct
  • No wet trades required
  • No additional trades required at framing stage
  • Conventional installation of internal linings at plastering stage
  • Branz Appraised
  • CodeMark Certified
  • Fire ratings up to FRR 90/90/90
  • Acoustic ratings up to Rw/STC = 66dB
  • Sustainability: GECA certified plasterboard
Scope of Use


  • Separating walls between attached dwellings
  • Timber or steel framed buildings

USG Boral Partiwall Intertenancy Wall Systems have been appraised for use as fire-rated and sound-insulation rated walls between household units within the following scope:

  • Constructed with timber-framing within the scope of NZS 3604, or to a specific engineering design (refer Paragraph 8.1]; and
  • With a maximum building height of 10.0m when designed in accordance with NZS 3604; or
  • With a maximum Partiwall height of 12.0m when subject to a specific engineering design


Statement of Building Code Compliance

In the opinion of BRANZ, USG Boral Partiwall Intertenancy Wall Systems, if designed, used, installed and maintained in accordance with the statements and conditions of BRANZ Appraisal 898 (2015), will meet the following provisions of the NZBC:

  • Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4. USG Boral Partiwall Intertenancy Wall Systems meet the requirements for loads arising from self-weight imposed gravity loads arising from use, and impact [i.e. B1.3.3 (a), (b) and [j]]. See Paragraphs 8.1- 8.4 of the Appraisal.
  • Clause B2 DURABILITY: Performance B2.3.1 (a) not less then 50 years, B2.3.1 (b) 15 years end B2.3.1 (c) 5 years. USG Boral Partiwall Intertenancy Wall Systems meet these requirements. See Paragraphs 9.1- 9.4.
  • Clause C3 FIRE AFFECTING AREAS BEYOND THE FIRE SOURCE: Performance C3.4 (a) end C3.6. USG Boral Partiwall Intertenancy Wall Systems meet the requirements by providing passive fire end smoke protection. See Paragraphs 12.1 -12.2.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. USG Boral Partiwall. Intertenancy Wall Systems meet this requirement end will not present a health hazard to people.
  • Clause G6 AIRBORNE AND IMPACT SOUND: Performance 26.3.1. USG Boral Partiwall. Intertenancy Wall Systems meet this requirement. See Paragraph 15.1.
Other Performance Attributes
  • Fire: Ratings up to FRR 90/90/90
  • Acoustic: Ratings up to Rw/STC = 66dB
  • Sustainability: GECA certified plasterboard


The Partiwall System does not require maintenance but USG Boral recommends that a visual check of the wall is undertaken when the opportunity arises.

In the event that moisture gets into the cavity then the lining must be removed and the Partiwall inspected, as moisture may cause degradation to the structural integrity of the Shaftliner or Firestop.


B1 Structure compliant
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
F2 Hazardous Building Materials compliant
Hazardous Building Materials
G6 Airborne and Impact Sound compliant
Airborne and Impact Sound
BRANZ Appraised
BRANZ Appraised
Interior Fire Rating 1S
Drawings: Partiwall Details
BRANZ Appraisal


CodeMark Certificate


GECA Certified
Partiwall Installation Manual

USG Boral manufacture and supply plasterboard systems, membrane roof boards, steel partitions and suspended ceilings.

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