# How much roof deicing cable do I need?

Contents

## What length of de icing cable do I need?

Operating costs

As mentioned above – you will use about 8W per linear foot of ice-melting cable. A typical 120 foot long roof edge with 6-12″ overhangs and no gutters deicing, will need about 291 feet of cable.

## How much heat tape do I need for a roof?

Heat Cable Roof Clips – Recommended Qty: 1.5 clips per linear foot of roof edge (as a general rule) Downspout Hangers (if there’s a downspout) – Qty: 1 per downspout transition (e.g. – if your cable goes down and then back up the downspout, you will need 2 hangers)

## How do you calculate heat tape for pipes?

To determine required heater length (Lh), multiply length of pipe (Lp) by (Rp). Lh = Lp x Rp.

## Do roof heating cables use a lot of electricity?

This is the reason why these heat cables generally last so long. … A typical constant wattage cable might use 5 watts per foot no matter what the temperature is outside. So, if the cable is 100 feet long, it will use 500 watts per hour. Electricity is paid for in watts, not amps or volts.

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## How hot does Roof de icing cable get?

Self-regulating electric heating cable is perfect for heating your roof and/or gutter as it is designed to maintain temperatures up to 150°F (65°C) and can withstand temperatures up to 185°F (85°C).

## When should I turn on my roof heating cables?

You should turn on your roof heating cables about an hour or two before the snow is expected. This helps the roof warm up so that the snow can start melting immediately. If the cables are not warm enough when the snow starts to fall, they may become overwhelmed and not be able to catch up.

## How much does heat tape cost per foot?

Heat Tape Installation Cost

Heat wire costs between \$12 and \$20 per foot to install. This cost varies depending on the difficulty of the project.

## How much heat cable do I need for pipes?

For Each Valve

Pipe Diameter (IPS) (inches) Heating Cable (ft) Heating Cable (m)
1 2.0 0.6
1-1/4 3.3 1.1
1-1/2 4.3 1.3
2 4.3 1.3

## Can you put heat tape on a flat rubber roof?

Unlike cheap cables, HeatTapeXGR can be overlapped during installation, can be installed on flat roofs, metal roofs and rubber roofs, will not light leaves on fire under any circumstance and operates effectively when it’s 15 degrees or colder outside.

## How long do roof heating cables last?

Most heat cable doesn’t even last long to begin with; the average life of heat cable seems to be around 3-5 years.

## Are heating cables safe?

When heating cables are poorly designed or manufactured, they can pose safety risks that are not worth the cost. According to the Consumer Product Safety Commission, about 3,300 residential fires occur each year because of heat cables. These fires cause 150 injuries, 20 deaths, and over \$20 million in property damage.

## Do heat cables prevent ice dams?

First and foremost, it is very important to understand that heat cables do NOT prevent ice dams from forming or get rid of them altogether. They merely melt channels through the formed ice dams to minimize the amount of buildup and partially remove snow from the area.