What if the underfloor heating system fails?

The system is tested before it leaves the factory and the resistance readings noted. Enerfoil is an etched aluminium laminate and the only way the system can cease to work is if the foil is cut or damaged. By taking the resistance readings as shown in the instructions then it will indicate that the system is working before, during and after installation. Always follow the instructions and make sure the floor is clean and smooth an that tiles are not cup on the foil or tile chips left on the foil.  more