... equivalent plasterboard wallboard, feather edge compliant to BS 1230: Part 1: 1985, sound, moisture and fire-check;Insulation: rigid mineral ... tiles, colour: white, 100x100mm, silicon sealant to all perimeters (int.corners, metal corner and external ends of tiles);8. Plumbing ... pipes, 15mm and 22mm; in compliancewith BS 7291-1,2; e.g. Plumbfast Co. products (or equivalent); Hot and Cold water fittings ...