Tag Archives: Snowmelt cable installation

Installation Tips – Installing a Snow Melting System in Asphalt

Installation Tips for Installing Snow Melting Heat Cable in Asphalt (Quick Reference Guide – Article 1 in a Series of 3)

Remember to check the element resistance and the insulation resistance of the heating cable/mat at the recommended intervals:

  1. In the box: Write the values on the warranty card.
  2. After being laid out: Write the values on the warranty card.
  3. After being covered: Write the values on the warranty card.
  4. Record your readings in the installation manual.
  • When laying out the cable, DO NOT allow heating cables to touch, cross, overlap or get bunched up. Minimum allowable spacing is 2 inches.
  • Do NOT place asphalt that is higher in temperature than the cable’s maximum rated temperature on the heating cables.
  • Heating cables should be securely fastened so they do not move or shift during the embedment process.

Applying hot asphalt over heat cable mats

  • Do NOT use a track application machine on the asphalt. Rubber tire applicators are okay as long as the asphalt temperature is below the maximum rated temperature for the heating cables.
  • The operating weight of the asphalt roller should not exceed 1,000 pounds. (The heat cable is designed to handle 8.9kN before the insulation is damaged, which will cause the cable to fail.) NOTE: A walk-behind roller imparts a force of between 5-18 kN.
    • Use a small power roller to compact asphalt over cable on sand, concrete, or ½-inch aggregate. A smaller roller will take more time, but decreases the chance of damaging the heating cable.
    • A roller with 30 kN or less is allowable when heating cable is in concrete and the concrete is then covered is asphalt.
    • When compacting/rolling on a grade, do not stop the roller. Stopping and resuming the roller may stretch and break the heat cable.
  • Do NOT dump large quantities of asphalt on small sections of the heating cables. Doing this may cause damage to the cable because of excessive, focused heat. Ideally, the asphalt should be applied by hand.

Installing a heated asphalt driveway

  • Do NOT cut or alter the heating cable. Mat tape may be cut, but the heating cable must never be cut.
  • Embed all of the heating cable and the splice in the asphalt. Allow asphalt to cool to a temperature of approx 212°F (100°C) before applying directly over the cable and splice.

Installing the cable splice in asphalt.

  • Manually lay the asphalt and spread the material evenly around and over the heating cables.
  • Heating cables are normally covered by 2-inches of asphalt. Leave a buffer of 4 to 6 inches of unheated asphalt around the edge of the heated area. This allows for adjustment of paving surface edges without damaging the heating cable.
  • Handle heating cables carefully – use extreme care with tools such as shovels, rakes and wheel barrels to avoid damaging the cables.
  • Verify cable integrity by checking resistance often during installation.
  • It is important that the snow melting system be wired by a licensed, qualified electrician and in accordance with local laws, codes, regulations, and NEC guidelines.
  • Ground sensors/cups should not be exposed to temperatures above 80°C (176°F).
  • A perimeter of a maximum of 12 inches of asphalt should exist around the embedded cables. This allows for adjustment of the paving surface edge without damaging the heating cable.

* This list is intended as a general quick reference guide. It is NOT a substitution for proper training and following the installation manual. Always read and follow the installation manual. Web-based training is available on request.

For more information about installing heated driveways and snow melting systems, visit Warmzone’s Installation Overviews web page. Warmzone also provides a host of radiant heat installation videos online as well. Call us today for more information at 888.488.9276.

Installation Tips – Installing a Snow Melting System in Concrete

Installation Tips for Installing a Snow Melting System in Concrete (Quick Reference Guide – Article 2 in a Series of 3)

Remember to check the element resistance and the insulation resistance of the heating cable/mat at the recommended intervals:

  1. In the box: Write the values on the warranty card.
  2. After being laid out: Write the values on the warranty card.
  3. After being covered: Write the values on the warranty card.
  4. Record your readings in the installation manual.
  • Ensure that all sharp stones and debris are removed from the area where the heating cable will be installed.
  • Place the remesh in preparation of the concrete pour.
  • Lay the cables/mats according to the plan and fasten them to the remesh or rebar (using plastic zip-lock ties) so that they do not move during the concrete pouring.
  • Do NOT allow heating cables to touch, cross, overlap or get bunched up.

wz-sm-Heating_Cable_Tips-Keeping_Your_Cable_Safe thumbnail

  • Do NOT cut or alter the heating cable. Mat tape may be cut, but the heating cable must never be cut. View the video How to Make Turns with mats.
  • Heating cable/mats should be spaced at no less than 2-inches center-to-center and no more than 4-inches center-to-center. This also applies to adjacent heating mats.
  • Secure the heating cable to the wire mesh or grid using plastic zip ties. Make sure that the cable/mats and the wire mesh are secure so that they will not move or shift when the concrete is being poured.
  • The heating cable will need to be positioned 2-inches from the surface of the concrete. Use wire remesh and Mesh-Ups or concrete dobies/chairs to position the heating cable within 2-inches of the surface. The heating cable/mat should never rest on the ground.

Placing Mesh-Ups under cable and remesh

  • Do not allow heating cable to cross an expansion joint. Control joints are allowable under the following conditions:
    • The joint is tooled or cut NO deeper than 1¼-inches.
    • A 6-inch piece of ¼-inch angle iron is recommended to protect the cable any place where a control joint will pass over it. The heating cable is tightly strapped to the angle iron with plastic zip ties.
    • Mark the forms where the angle irons are located to accurately place the control joints.
    • The cable must be ¾ to 1-inch below the bottom of the joint. (Do NOT tool joints deeper than 1½ inches. Stay above heating cables.)
  • Embed all of the heating cable and the splice. The cold lead on the heat cable and mats is not rated for direct burial in earth and must be run through a conduit. (The first 6-inches of the cold lead and splice must be embedded in the heated surface.) See the illustration showing the installation of the heat cable and power lead.
  • Handle heating cables carefully. Use extreme care with tools such as shovels, rakes and wheel barrels to avoid damaging the cables.
  • Verify cable integrity by checking resistance often during installation.
  • It is important that wiring of the system is completed by a licensed and qualified electrician and in accordance with local laws, codes, regulations, and NEC guidelines.

* These tips are meant for quick reference. It is NOT a substitution for proper training and following the installation manual. Always read and follow the installation manual. Web-based training is available on request.

View Warmzone installation videos.

Installation Tips – Installing a Snow Melting System Under Pavers

Installing Heat Cable under Pavers (Quick Reference Guide – Article 3 in a Series of 3)

Remember to check the element resistance and the insulation resistance of the heating cable/mat at the recommended intervals:

  1. In the box: Write the values on the warranty card.
  2. After being laid out: Write the values on the warranty card.
  3. After being covered: Write the values on the warranty card.
  4. Record your readings in the installation manual.

When laying out the cable, DO NOT allow heating cables to touch, cross, overlap or get bunched up. Minimum allowable spacing is 2 inches.

Begin installation as close as possible to the electrical source.

Heated driveway with brick pavers

DO NOT cut or alter the heating cable. The white binding tape of heating mats may be cut in order to make turns with the mats, but the heat cable must never be cut or altered.

ClearZone heating cable in mat and rolled.

To secure the cable, lay down a piece of thin wire mesh that fits the area to be heated. The wire mesh should be secured to the ground (with landscaping staples or pins) so it will not move during the embedment process.

Roll out the heating cable or mat and secure it to the wire mesh or grid using plastic zip ties. Heating cables should be securely fastened so they do not move or shift during embedment.

Heating cable should be spaced at no less than 2-inches center-to-center and no more than 4-inches center-to-center. This also applies to the cables in adjacent heating mats.

Contact paver or block manufacturer for total sand or dust depth needed for proper paver/block installation.

Sideview of heat cable installed under pavers

Embed all of the heating cable and the splice in a minimum of 1-inch (½-inch above and ½-inch below) of compacted material such as paver sand or stone dust. Cable and splice must be completely embedded. No air gaps around the cable or splice are allowable. Gauge of paver sand, stone dust or base material must be fine enough to completely encapsulate cable.

Do NOT drop pavers directly on the cable. (This can damage the cable insulation.)  If this occurs, stop installation and check cable integrity via ohm reading.

Handle heating cables carefully – use extreme care with tools such as shovels, rakes and wheel barrels to avoid damaging the cables.

Verify cable integrity by checking resistance often during installation.

It is important that this equipment be installed by a licensed and qualified electrician and in accordance with local laws, codes, regulation and in accordance with NEC guidelines.

If installing in permeable pavers or with pavers or blocks greater than 3-inches thick, contact Warmzone BEFORE installing.

* This list is intended as a general quick reference guide. It is NOT a substitution for proper training and following the installation manual. Always read and follow the installation manual. Web-based training is available on request.

Heated paver walkway

For more information about installing heated driveways and paver snowmelt systems, visit Warmzone’s Installation Overviews web page. Warmzone also provides a host of radiant heat installation videos online as well. Call us today for more information at 888.488.9276.