Heating Mats – NADWM

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Can I install my electric floor heating system in a shower pan?

When installing a Warmup mat or cable in a shower, it must been between two non-combustible materials. Typically, when the shower base is a poured mortar bed, the heating system goes on top of the sloped pan. It is then skim-coated with thinset and tiled over. Do not install Warmup directly over the rubber moisture membrane. And we advise against embedding Warmup in the mortar bed as long heating times could ensue.

In the case of building panels such as backer-boards or WEDI shower systems, you can install Warmup mats and cables directly over the boards.