In-Slab Heating System Installation

The Warmup® In-slab Heating Cable is designed to be placed within the cementitious slab of at least 2” (50mm) in thickness, with at least 1¹/₈” (30mm) of slab above the heating wire. Depending on the construction of the subfloor, you may need to use additional insulation with your installation.

Step 1

Prepare floor plan of the area requiring the slab heating system & note the area to be heated. It is advised that a floor plan is drawn up to determine the placement of the thermostat, heating cable and the sensor probe. This diagram should be kept for future reference.

Step 2

The fixing strips should be laid out perpendicular to the heating cable runs. These fixing strips must be secured to the insulation or the concrete floor using fixing nails or an adhesive. It is important to ensure there is no movement of the fixings.

Step 3

The fixing strips should be evenly spread across the floor at interval of 30” (0.75m). The fixing strips should be placed so as to leave a minimum of 4” (100mm) border all the way around the room.

Step 4

Examine the cable and test the resistance BEFORE and AFTER installation.

Step 5

The heating cable should then be laid up and down the room and clipped into the fixing strip. The cable spacing is determined by the product model. The cables should be spaced evenly at all times to ensure an evenly heated floor (minimum spacing is 2” (50mm). The cables should never touch or cross each other.

Step 6

The heating cable cold tail should be connected to the thermostat by a qualified electrician in accordance with NEC (USA). The heating cables should then be tested again BEFORE POURING the layer of cement. Record the readings in the NOTES Section. Once laid, the heating cables must be covered with a minimum thickness of 1¹/₈” (30mm) of cement.

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