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Navigation arrow   THE BENEFITS Navigation arrow   ROOF DEICING OPTIONS Navigation arrow.   LOW VOLTAGE INSTALLATION Navigation arrow   PROJECTS

Installing RoofHeat STEP Deicing Systems

Warmzone's RoofHeat STEP radiant roof heating systems feature a unique, thin, flexible polymer heating element that can be installed directly under shingles or metal roofs. The low-voltage polymer heating element can be nailed or stapled through, making installation much easier than that of other roof heating systems. The discreet roof heating system can be installed under the roof material along the roof edges and in valleys. Potentially damaging snow buildups and ice dams can be eliminated with the use of this effective, low-profile roof heating system. Because the heating element is self-regulating, as the material gets warmer, less energy is needed, making RoofHeat STEP very efficient roof deicing solution.

General Features and Installation Tips:

The heating elements should not touch, cross, or overlap at any point.

Heating elements should be installed in temperatures between 40°F and 140°F (4°C to 60°C).

The heating element can be cut to length on site.

The element can be bent up to 90 degrees to fit almost any contour or crease.

RoofHeat STEP is a low-voltage product and should only be energized via the supplied power packs.

Do not exceed the maximum run of material as indicated in the design details from Warmzone.

This product should only be installed in accordance with local and national codes, ordinances, trade practices and manufacturer instructions.

In cold conditions, the polymer heating element can be stiff and brittle, and therefore must not be bent or folded. Rolled up heating elements may be energized for a short period of time to make them warm and softer, but they must be constantly observed not to overheat while on the roll.

Installation of Roof Deicing System Components

RoofHeat STEP radiant roof heating and deicing systems contain three main components: The step-down transformer, polymer heating element and STEP Touch thermostat (activation device).


Radiant roof heating element.

Specially Constructed Low-Voltage Heating Element
The thin RoofHeat STEP heating element is polypropylene fused during fabrication to achieve water proofing and ensure that the panel is protected against UV rays and other potential physical damages.


To expose the two longitudinal bus braids, cut the plastic on each side of the braid with scissors or make a score in the plastic, front and back, with a knife.


Bend the element where the cut is made and pull off the corners to remove the surplus of plastic. Make sure that the bus braid is not cut or damaged; should this occur, re-cut the element and re-strip the bus braids.


Connect the bus braid to an extension wire, #12AWG (4 mm2) PVC insulated, stranded tinned copper wire, 105 C, 600V. Crimp the joint using the recommended tinned copper connectors and crimp tool. IMPORTANT: Check that the connections are secure. NOTE: Using components not recommended by the manufacturer will void the warranty.


RoofHeat STEP roof deicing system being installed to heat roof valley and edges.Warmzone radiant roof deicing systems are fairly easy to install when compared to other radiant roof heating systems. A qualified electrician should be able to easily install the system. Roofing contractors should be able to install a majority of the system before having an electrician hook up the power. In addition to our complete design and engineering services, Warmzone also provides technical support five days a week. Radiant heat installation manuals and system diagrams are also available online.


Click here to submit your information and receive a FREE roof deicing quote. For more information and free consulting, call a radiant heat expert toll free at 888.488.9276.


In order for us to provide you with an accurate estimate, we will need to know the dimensions of the area you wish to heat. Email us or fax us (801.948.7599) a plan or sketch of your roof, and we will be happy to provide you with some options that are specific to the needs of your unique project. We will also include expert recommendations and an accurate price estimate. (Warmzone includes complete radiant heat system design and engineering services with each system sold.)