The IWS treatment offers the unique combination of:
– Flame Retardant (FR)
– Water Repellent (WR)
The WR included has been successfully used in the Ultrajoist product for over 10 years
to minimise the ingress of water, resulting in greater stability during and after the build
process. This is a tremendous advantage when multi-storey timber structures are being
constructed. The IWS treatment under test has demonstrated its ability to minimise
dimensional change when measured against its leading competitor products.