Protect TF200 Extreme is a high performance, waterproof,
breather membrane designed for use externally on timber frame
walls, Structural Insulated Panels (SIPs), Cross Laminated Timber
(CLT) panels and steel frame construction on buildings sited in
very severe, exposed locations. The product is aligned to STA
Advice Note 18, where it is recommended that membranes
with Class W1 water penetration resistance are used for
these harsh environments.