They also can use Exclusive weld pins with integral-cupped head washers. Unfaced boards can then be concluded with reinforced insulating cement, canvas, or weatherproof mastic. Faced boards could be put in in a similar way, and also the joints amongst boards sealed with tension-delicate tape or glass cloth and mastic. https://freeecogrants.co.uk/how-to-improve-your-living-by-availing-of-the-home-eco-grants/