How Much Roof Heat Tape Do I Need

Estimate electric circuit load most roof heating wire products are 110v with rated electric use of 8w per linear foot.

How much roof heat tape do i need.

Calculate the length of heat tape and the number of roof clips and hangers needed for a heat tape installation to prevent ice dams. If the end of the heat cable stops in the downspout use that measurement. If your distance to power connection is longer then 15 feet you may want to consider our new heattape pro xl line of heat tape that includes an extra long cold lead on our industry leading heattape pro. Measure the length of the downspout.

This means that you should not install more than 190 feet of heat wire on a single 15a circuit. Measure the length of your roof line. You will start by determining the length of heat cable you need. This should give you a rough idea of the length of cable you need.

The most common heat tapes use either 2 watts per foot or 7 watts per foot and keep your water line from freezing down to an impressive 50f degrees. Self regulating roof heat tape systems only draw the power they need to get the job done. Operating costs are far greater than the higher quality self regulating roof heat tape systems we install every day because big box ice dam heat tape systems operate at 100 capacity all the time regardless of the outdoor temperatures. Pirit heated hose 278 airport rd manchester center vt 05255 p.

If you choose to use heat tape pro xl add only the distance to power connection that is surplus of 50 feet so if you are 65 feet away put 15 for this. There are 19 clips per pack. 888 pirithh 747 4844 or 802 549 4671 customer service contact. If the eave overhang is 12 inches deep multiply the roof line measurement determined in step 1 by 4.

Divide the roof edge length by 19 and round up to get the number of clips that you will need.