What is the impact strength?

The coating thickness is to be at least 6mm above the fixing buttons and insulating sheet (IB Board) providing a SB impact strength of >20 joules.
The findings concluded by the CSIRO testing were submitted to the Building Regulations Advisory Committee (BRAC) as part of the evidence that the Unitex Base Board System is a viable building material able to withstand many different weather and man-made abuses.

What are the accoustic ratings on Base Board?

Unitex Base Board 75mm has been tested with various plasterboard situations.  The results of these tests are downloadable below.

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What happens to the underside of the Unitex Base Board Panels where they meet the ground and or a roofline?

A Unitex Base Block is installed around the permitter at slab (base plate/stud/noggins) and at floor roof line to the first floor base plate (stud/noggin) below the base of the sheets, ensuring the system is completely sealed and no polystyrene is left uncoated preventing degradation. Under no circumstance should raw polystyrene be left exposed.