Heat wires are electrically heated cables, usually put along the border of a rooftop and via the gutter. Roof heat cables are very popular in cold regions. 

Heat cables can undoubtedly assist a property that suffers from ice jams. So, in case of using it, you must ask how much electricity does roof heat cable use.

Heat-Line products can consume as little as 0.5 watts each foot to as much as 9 watts per foot at extreme temperatures, based on the brand and application circumstances.

There are many things to know about roof heat cables that determine the electric consumption of roof heat cable . Read the article to find out more about roof heat cables.

How Much Electricity Does Roof Heat Cable Use

Roof heat cables perform extremely well when correctly placed, but they don’t always provide the dramatic aesthetic difference that most customers expect. The wires do not completely eliminate snow spots, but, instead melt the frost immediately surrounding them, allowing water to flow down into the gutter.

The amount of electricity that a roof heat cable uses depends on some factors. The needs for electricity for constant wattage cable depend on the size of the wire. A common constant wattage wire may utilize 5 watts/foot regardless of the ambient temperature. As an example, if the wire is 100 feet in length, it will consume 500 watts each hour.

Types Of Roof Heat Cables

On the roof, there are two basic categories of heat cable that may be utilized. The first one is the constant wattage cable. And the second type is self-regulating heat cable. 

Constant Wattage Cables

Constant wattage wires are more fragile and often have a significantly shorter life expectancy. 

These heat cables are typically chosen by consumers who wish to undertake the process themselves.

However, they are also utilized by professionals who are less concerned with long-term installation instead concerned with how cheaply the heat cables can be purchased.

Self-Regulating Heat Cables

These heat cables can control the amount of power required all the way down the heating wire.

Like the heat cable heats, it regulates the power used to restrict or manage the cable’s real temp or heat output. 

That’s why such heat cables often survive so long. Even though they get into touch with each other or overlap, only their own self-regulating capacity keeps them from burning out.

Usage Of Roof Heat Cables

Heat wire melts snow and ice as it falls all along the roofline, avoiding ice jams and allowing water to flow into clear gutters. It is highly beneficial. You know, in the absence of a channel, the transformed water will start to back up and deep inside your property.

One criticism leveled with roof heat cables is that these are only effective in cold but warm weather, generally down to approximately -9 degrees F. If you think about it, this definitely sounds reasonable.

Ice dams occur as a result of snow melting, thus they appear only when the air temperature is below freezing. So, in extremely cold weather, the roof heat cables have no usage.

Problems Of Roof Heat Cables

Every material we use can have negative impacts. It’s a very natural thing. So, there are some problems you can face due to roof heat cables. The problems are;


One significant disadvantage of heat cables is their high cost.

To function properly, they must be switched on at least one or two hours before snowy weather arrives and left on whenever snow and ice accumulate on the rooftop.

Particularly, if your house requires several wires, it will need more electricity. These are most emphatically not cost-efficient.

Unnecessarily Actions In Sometimes

An ice dam can be caused by anything which melts ice on the roof.

The wires will cause zig-zagging pathways of melting snow to form over your roof. The melting ice is meant to slide down your roof’s inclination and land in the soil. 

However, it frequently refreezes around the corner of your canopies or above the cable.


So. what will you say? Have you got the answer to how much electricity does roof heat cable use? I think I could explain it in a good way for you.

Hopefully, you’ve enjoyed the article. You can use roof heat cables as you wish as you know all about these. 

All the best. Have a nice warm day.


As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

Write A Comment