They may also use Specific weld pins with integral-cupped head washers. Unfaced boards can then be finished with bolstered insulating cement, canvas, or weatherproof mastic. Faced boards may be put in in exactly the same way, along with the joints concerning boards sealed with pressure-sensitive tape or glass fabric and https://freeecogrants.co.uk/reasons-to-apply-for-government-grants-loft-insulation/