Wet-location requirements in the current TempZone twin-conductor Flex Roll installation manual.
The current TempZone twin-conductor Flex Roll manual states that the product’s UL listing covers wet locations in both the United States and Canada. This guidance applies to the product covered by the linked manual; confirm the model and instructions supplied with an older installation.
Installation must follow the applicable National Electrical Code or Canadian Electrical Code and local requirements. Final acceptance rests with the authority having jurisdiction.
- WarmlyYours recommends a separate mat for shower areas.
- Maintain the mortar-bed slope toward the drain.
- When using an insulation board over a slab, use an appropriate adhesive or thinset to secure it.
- The manual recommends a secondary waterproofing membrane over the mortar bed covering the wire, installed according to the membrane manufacturer’s instructions.
The heating system does not replace the shower’s required waterproofing or the inspection of the complete installation.
Sources
- Manufacturer instructions (publication 4588), PDF p. 11, “When Installing in Wet Locations”.
