They may also use Exclusive weld pins with integral-cupped head washers. Unfaced boards can then be completed with reinforced insulating cement, canvas, or weatherproof mastic. Faced boards is usually set up in the exact same way, plus the joints amongst boards sealed with force-sensitive tape or glass material and mastic. https://freeecogrants.co.uk/what-are-the-benefits-of-applying-for-external-wall-insulation-grants/