They may also use special 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 mounted in precisely the same way, and the joints among boards sealed with pressure-delicate tape or glass cloth and mastic. It's https://freeecogrants.co.uk/how-pensioners-can-insulate-their-home-in-the-uk-with-free-insulation-grant/