They also can use Specific weld pins with integral-cupped head washers. Unfaced boards can then be finished with reinforced insulating cement, canvas, or weatherproof mastic. Faced boards might be set up in precisely the same way, and the joints between boards sealed with force-sensitive tape or glass cloth and mastic. https://freeecogrants.co.uk/how-eco-grants-uk-can-help-you-to-upgrade-your-property/