Fire Retardant Treatments

Fire Retardant Treatments 2017-06-16T04:49:43+00:00

Fire Retardant Treatment

Evolution Forest Products is able to offer its range of timber based products with fire retardant treatments.In many parts of Australia, the construction of new buildings and additions to existing buildings will be assessed as being in a Bushfire Prone Area. The relevant Australian Standard — AS 3959 — provides for a range of Bushfire Attack Levels for proposed construction. Each Level is based on the assessed threat and as the assessed threat increases, so do the restrictions on the building materials that may be used. Where there are restrictions on the building materials, timber is permitted in the lower levels provided the timber species meets certain criteria.
There are 2 main criteria:

  1. For some applications, AS 3959 indicates that there are no requirements or permits the use of timber. For such applications any timber may be used (where appropriate) provided that the timber meets the requirements of all the other standards and codes that apply to the construction.
  2. For some applications, AS 3959 restricts the use of timber to a fire-retardant-treated timber. However, the Standard does provide that some timber species are capable of meeting the required parameters (for resisting fire) without having to be subjected to fire retardant treatment. Again, the timber used must meet the requirements of all the other standards and codes that apply to the construction.
    The following timber species have been tested and found to meet the required parameters without having to be subjected to fire retardant treatment:
·         Blackbutt

·         Merbau

·         Red Ironbark

·         River Red Gum

·         Silvertop Ash

·         Spotted Gum

·         Turpentine

It should be noted that AS 3959 does not replace any other standards which might set out minimum requirements for construction in a particular area but rather AS 3959 sets out  requirements which are dependent upon the degree of assessed threat of Bushfire attack and which are additional to the requirements of those other standards.