HeatMatrixInstallers can have the versatility to vary wire spacing, allowing customers a choice of different heat outputs, based on floor and room heating needs. The new membrane can be installed using modified thinset on top and bottom of the mat. The heating wire sits below the surface of the mat, providing greater protection from damage. In addition, the company offers a diameter wire with increased durability and is made specifically for securement in the product’s membrane. SunTouch.