19mm Siniat Weather Defence™ is a Euroclass A1 non-combustible plasterboard (Type GM-F, GM-H1 and GM-I to EN 15283-1). Conforming to UKCA, the 19mm Weather Defence is fully compatible with Siniat existing shaftwall components and is available in 1200(w)x2000(l)mm.

The 19mm edition of Weather Defence forms as part of the new A1 rated Siniat shaftwall system(s) - which is 3rd party classified to EN 13501-1 for verified compliance.