Underlayment for Heated Floors
While not every floor heating project requires an underlayment, they are particularly useful for projects where there is concern about heat loss to the subfloor or when subfloor issues threaten to compromise the integrity of relatively fragile flooring types like tile, marble, or stone. WarmlyYours offers 2 different underlayment products: Prodeso Cable Installation Membrane and ThermalSheet.
Which Radiant Heating Underlayment Option is Right for You?
Selecting the perfect floor heating underlayment will depend on information that is unique to your project like the type of subfloor you're installing over and the flooring type you'll put over the heating system.
Prodeso Cable Installation Membrane
An uncoupling membrane that can only be used with the TempZone Floor Heating Cable. The membrane provides long lasting uncoupling and crack isolation benefits for tile, marble, and stone floors. The benefit of uncoupling is that it allows for a small degree of foundational movement without causing the tiles to crack, break or "pop." An additional benefit is that it can greatly decrease installation time. Check out our design guide on Floor Heating with Prodeso Membrane and Tiles.
ThermalSheet
A synthetic "insulating" underlayment that has a higher degree of thermal resistance (R-value of 1.5) than cork. ThermalSheet is the recommended underlayment for heating on top of a concrete slab and is often paired with our TempZone and Environ electric floor heating elements.
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ThermalSheet is lightweight, synthetic cork underlayment system that is specifically designed for setting tile and stone and is an excellent insulation choice under our TempZone™ and Environ electric floor heating elements.
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Synthetic cork insulating underlayment; thermal break with R-value 1.5
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Usable under tile, stone, LVT, laminate; over acceptable subfloors
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Heat/cold resistant; will not rot, support mold/mildew, or absorb moisture
- 2' x 3' sheet (1 sheet) for a total coverage of 6 sq. ft.
Prodeso Cable Installation Membrane is an uncoupling membrane designed for TempZone cable and greatly accelerates floor heating installations.
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Energy‑efficient radiant heat installation membrane
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Quick, easy installation – in and out in one day
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Flexible layout adapts to room size; no waiting
- 3' x 16' roll (54 sq. ft.)
- 3' x 49' roll (162 sq. ft.)