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Firestop is a specifically formulated fire-resistant core plasterboard. It provides an ideal solution for products where specific fire-resistance ratings are required in partition wall and ceiling systems. Firestop is used in the Partiwall System.

Scope of Use

Firestop is suitable for use in all commercial and residential situations provided that its specification and installation is in accordance with USG Boral Plasterboard Installation Manual — NZ.

It is suitable for installation on framed walls and ceilings, where the building design falls within the design scope of NZS3604, or AS/NZS1170.

Where Firestop is to be installed in an existing building, the installer must assure themselves that the framing and existing building are suitable for the proposed building work.

Limitations on Use

The specification of Firestop must be in accordance with USG Boral information.

It must be specified by an LBP, able to provide a design memorandum to the relevant Building Consent Authority (BCA), if RBW provisions apply.

Installation must be undertaken by or supervised by an LBP (carpentry license).

Firestop board should not be exposed to sustained temperatures exceeding 42°C or to excessive, repetitive or continuous moisture before, during or after installation. All sources of moisture should be eliminated immediately.

Statement of Building Code Compliance

Firestop plasterboard complies with the following performance criteria of the NZ Building Code:

  • B1.3.1: In respect of building element
  • B1.3.2: Manufactured in accordance with AS/NZS2588
  • B1.3.3 (a, b, c, f, j, l, o, r): Impact ASTM E695-75
  • B1.3.4 (a, b, c, e): Panel performance ASTM E72-80
  • B2.3.1(a) and B2.3.2: USG and Boral have a combined plasterboard manufacturing experience in excess of 145 years. During this time USG Boral have supplied plasterboard along with plasterboard wall and ceiling systems for use within residential and commercial sectors.
  • C3.4 (a): Material Group No 1-S, BRANZ assessment FAR4435
  • F2.3.1: Manufactured in accordance with AS/NZS2588
Other Performance Attributes
  • Fire: Firestop is a non-combustible building product and achieves a material Group 1-S depending on finished coating applied (BRANZ Assessment FAR4435). It achieves fire resistance depending on the fire rated systems application. Where relevant, 13mm Firestop may be substituted with 13mm Wet Area Firestop in fire rated applications.
  • Acoustic: Firestop, may be used in an acoustic system to provide required levels of sound insulation to achieve specified acoustic ratings.
B1 Structure compliant
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
F2 Hazardous Building Materials compliant
Hazardous Building Materials
Interior Fire Rating 1S
Brace+ Installation Manual
Material Safety Data Sheet
VOC Certificate
USG Boral Plasterboard Installation Manual
Plasterboard Identification Guide

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

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