A rigid, dense fibreboard underlay, made from natural fibres and ideal for all Holt and Staki engineered floors!

This 5.5mm rigid fibreboard underlay is loose-laid on all sub-floors with the boards butting up tight to each other. It levels out unevenness in subfloors, reduces footfall noise and limits heat loss. Just lay the rectangular boards across the room making sure there are no gaps between them, and then lay your new floor on top.

Key features:

• 5.5mm dense, rigid fibreboard underlay
• Made from natural fibres
• Board size - 850mm x 590mm
• 20 boards in a pack = 10.03 square metres coverage
• Good sound insulation
• Absorbs minor sub-floor imperfections
• Must be used with a vapour barrier if used on concrete sub-floors
• Loose lay - does not need to be glued down
• Suitable for under-floor heating