They may also use special weld pins with integral-cupped head washers. Unfaced boards can then be finished with reinforced insulating cement, canvas, or weatherproof mastic. Faced boards is often put in in precisely the same way, as well as the joints involving boards sealed with tension-delicate tape or glass cloth https://freeecogrants.co.uk/top-benefits-of-external-wall-insulation-of-your-property/