Description The 4mm PLUS Premium Underlay is our top-tier foil-layered fan-fold board, offering a thickness of 4mm for ultimate sound absorption, strength, and thermal properties. It features a vapour-tight foil membrane with overlap and integrated tape to create a damp proof barrier beneath the floor. This Underlay provides enhanced floor comfort and levelling, making it particularly ideal for high-traffic areas. Made from recycled plastics Excellent performance on all subfloors PLUS – vapour barrier, overlap and integrated tape L 1200mm x W 400mm x D 2.5mm Premium performance underlay Vapour barrier Levelling and floor comfort High traffic strength 9.6m² per pack Fan-Fold 400x1200mm per panel 20 Boards Perfect for underfloor heating Laying Instructions: Fan-Fold Underlay Surface Preparation Ensure the floor is clean, dry and dust free. Any loose floorboards and protruding nails should be hammered down. If the floor is damp, it must be isolated using a vapour tight polythene damp proof membrane. Data Sheet
