Fire rating is becoming increasingly stringent so it is important to understand the code requirements. Below is a summary of the main types of fire requirements in the NCC / BCA.
FRL (Fire Resistance Level)
This fire rating refers to three aspects – Structural adequacy, Integrity and Insulation – measured in minutes and written as xx/xx/xx. So for example, a 60/90/120 FRL refers to a wall which is rated to 60 minutes structural adequacy, 90 minutes integrity, and 120 minutes insulation.
Non-combustible materials are materials are often required in facade and internal wall situations. All James Hardie® and Scyon building products are suitable where non-combustible materials are required in accordance with specification C1.12 of the Building Code of Australia. (Refer to Section C, C1, C1.12 (d) of the NCC / BCA). Other materials may need to be tested to AS1530.1 to ensure non-combustibility.
Material Group Number
James Hardie® building products have been tested by CSIRO in accordance with AS/NZS and have been classified to conform to Group 1 (highest and best result possible), with an average specific extinction area far lower than the permissible 250m2/kg, as referenced in specification C1.10 of the BCA.
Request a Fire Certificate.
BAL (Bushfire Attack Level)
Different parts of Australia have different BAL ratings, based on the bushfire attack level. These BAL ratings range from BAL-12.5 to BAL-FZ (Flame Zone).
User our interactive house tool to find out your wall requirements.
Acoustic ratings ensure the comfort and amenity of occupants and are especially important in multi-residential development. Below is a summary of the main types of acoustic requirements in the NCC/BCA.
- Rw and Rw+Ctr: These are Weighted Sound Reduction Indices, and refers to the acoustic reduction of airborne noise travelling through a wall system. 1 increase in Rw roughly equates to 1dB reduction.
- Lnw+Ci: This describes how easily impact noise travels through a floor.
Request a site-specific acoustic prediction online.
With an increasing focus on environmentally sustainable construction it is important to understand thermal values. The R-value refers to the thermal resistance of the wall system.