Heavy contract carpet underlay which gives superior heat and sound insulation. This premium multi-layer underlay consists of a smooth bonded crumb rubber backing as a base material topped with a felt layer.This top of the range underlay is ideal for use in flats or shared houses to reduce noise transmission to other rooms and occupiers. Providing high comfort underfoot and keeping the warmth in the room. Put a bit of bounce back in your life.Supplied by the square metre and full rolls of 15 sq.