They also can use Unique weld pins with integral-cupped head washers. Unfaced boards can then be completed with bolstered insulating cement, canvas, or weatherproof mastic. Faced boards is usually installed in precisely the same way, as well as joints among boards sealed with pressure-sensitive tape or glass material and mastic. https://freeecogrants.co.uk/how-to-install-solar-in-your-house/