Size: 1m Wide x 2mm thick x 20Lm long  (20sqm per Roll) comes with double sided tape The good quality Combi-Lay Standard is a medium density polyolefin underlay for all floating floor applications. Featuring a continuous clear damp-proof with 100mm overlap and integrated “peel and stick”. The inclusion of a continuous damp proof is a requirement under most floating floor installations. With Combi-Lay, the need for additional damp proof layers is almost always avoided*, making installations quicker and more cost effective. The affordable Combi-Lay Standard package combines the right balance of compression, slip and damp proof characteristics. Handling the 20m² roll is easy and the no fuss lay flat polymers make installation simple.