They might also use Unique weld pins with integral-cupped head washers. Unfaced boards can then be completed with reinforced insulating cement, canvas, or weatherproof mastic. Confronted boards may be installed in a similar way, as well as joints involving boards sealed with stress-sensitive tape or glass material and mastic. Loft https://freeecogrants.co.uk/how-can-you-have-free-external-wall-insulation-done-to-your-property/