They could also use Exclusive weld pins with integral-cupped head washers. Unfaced boards can then be completed with bolstered insulating cement, canvas, or weatherproof mastic. Faced boards is often set up in the identical way, and also the joints among boards sealed with force-delicate tape or glass fabric and mastic. https://freeecogrants.co.uk/how-to-apply-for-solar-energy-grants-uk/