Lastly, measure the distance between the edge of the roof, where you will start the heat cable, and the electrical outlet where you will plug in the cable.Īdd up all of these dimensions. Made of non-corrosive aluminum, in anodized black. Clips are designed to firmly hold tape in place through storm weather and winds. Fasten clip to roof, then quickly and easily hold heat tape in desired position. If a downspout is not at the end of a cable run, double its measurement here-the cable will need to go all the way down and then back up inside the downspout. Clips to position & fasten heat tape for ice dams to your roof. Now, measure the length of each downspout and add this measurement to the previous computation. Heat cable on standing seam metal roofs, corrugated metal roofs and screw-down metal roofs all require slightly different approaches. If the eave depth is between 24 and 36 inches, multiply the roof-line measurement by 6.8. If the eave is between 12 and 24 inches deep, multiply the roof-line measurement by 5.3. If the eave overhang is 12 inches deep, multiply the roof-line measurement by 4.
Next, measure the depth of the eave overhang from the edge of the roof (not the gutter) straight back to the outside wall. Water will flow as long as the roof surface stays above freezing. There are several steps and calculations in this process.īegin by measuring the length of your roofline. Even on metal roofs the sun and building heat combine to melt accumulated snow at the roof/snow interface. If your heat cable doesn’t ship with the clips needed to secure it to the roof, you’ll need to spend a few extra dollars for this hardware. Beyond 50 feet in length, high-end heat cables range from 1.50 to 3 per foot. The first step is to determine how much heat cable you need. For cables of less than 50 feet of length, expect to pay 2 to 4 per foot. The Spruce Home Improvement Review Board.
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