Glasroc X The Weather Protection Hero
Glasroc X is an external sheathing board.
What makes it so special? Well, it is the only gypsum-based sheathing board with full British Board of Agreement (BBA) certification verifying its weather tightness performance for 6 months in its own right, rather than as part of a system.
It has a gypsum core containing special additives for moisture and mould resistance, glass mat on both surfaces and a UV resistant coating. All you could want from external sheathing boards, meaning that it can withstand all typical UK weather conditions.