Thermonet 150W/m² Underfloor Heating matt for Under tiles 1m²-16m²Thermonet features 3. 5mm Twisted Twin cable, self adhesive mesh and our low profile cold tail connection cable. These features make up what we call LayFlat Technology because this combination neutralises tension in the finished product and makes Thermonet easier to fit. We are so confident of the quality of our Thermonet Underfloor Heating systems, made in the United Kingdom, that we give each system a warranty that lasts a Lifetime with 3 year