Your installation guidelines show a "Thermal Insulation" between the concrete slab and the element. What is this thermal insulation and can you direct me to where the material is purchased?
Thanks,
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Getting Started
Did You Know?
STEP Warmfloor™ is the most energy efficient heating available because the material itself is self-regulating and only draws the energy it needs to maintain an even temperature on the whole surface. The heating elements cannot overheat.