They might also use special weld pins with integral-cupped head washers. Unfaced boards can then be finished with bolstered insulating cement, canvas, or weatherproof mastic. Faced boards might be set up in a similar way, as well as joints involving boards sealed with tension-sensitive tape or glass cloth and mastic. https://freeecogrants.co.uk/how-to-increase-value-of-your-property/