Are Roof Heat Cables Dangerous? What You Should Know

Heavy snowfall isn’t just annoying to shovel—it can also pile up and potentially damage your roof. That’s where roof heat cables come in: These systems are designed to keep snow buildups at bay and prevent ice dams, so you don’t have to worry about making costly repairs down the line. 

But are roof heat cables dangerous? Although they come with risks, proper installation and correct usage will keep the top of your home both fire and ice-free. 

What Are Heat Roof Cables and How Do They Work? 

Also called heat tape or heated gutters, heat roof cables are a series of heating wires installed throughout a roof—namely in the eaves, roof valleys, gutters, and around chimneys. They prevent ice buildup when the temperatures drop below zero. 

They’ll reduce snow mounds in valleys on your roof, but they’re especially good at eliminating ice dams in gutters. These form when heat from inside the home warms the roof and causes snow on top to melt and slide downward. Without something to guide the remaining slushy snow out through the downspouts, it may refreeze and get stuck in your gutters, creating an ice dam and putting your whole roof at risk of costly damage.  

Are Heat Roof Cables Dangerous? 

When heat roof cables are poorly manufactured, improperly installed, overused, or all of the above, they can pose a not-so-small fire risk to your roof and home at large. A 1989 report from the Consumer Product Safety Commission (CPSC) found that these systems can be responsible for up to 3,300 house fires a year. What’s more, you could get electrically shocked by handling cables after they’ve come in contact with water, which is a possibility when ice and snow are in abundance. 

Fortunately, most of these issues can be avoided by thoroughly inspecting the product before installation, hiring a trusted pro to install heat cables, and being extra careful about the way you use them afterward. 

Pros and Cons of Heat Roof Cables

There’s no discounting the risks involved in using heat roof cables, but there are plenty of benefits to consider, too. 

Pros

Repairing or replacing a roof is among the most expensive home projects out there, and heat roof cables prevent the need for such work in more ways than one.  

• Reduced risk of water damage and potential leaks.

• Eliminates heavy snow buildups and prevents roofs from caving in. 

• Fewer icicles and no ice dams. The threat of falling icicles won’t feel imminent with a system like this in place. 

Cons

Heat roof cables have plenty of advantages, but there are also a couple of reasons why they might not be right for you. 

• Not necessary in warm climates. 

• The possibility that heat roof cables will start a fire is never zero, and if you’re really concerned, consider an alternative solution like installing snow guards. 

• Higher energy costs.

Tips to Minimize Heat Roof Cable Safety Risks

Take a few extra precautions to give yourself some peace of mind when using heat roof cables. 

Examine Cables Before Setting Up

After purchasing heat roof cables, inspect them closely for any pre-existing damages or manufacturing issues. If you notice cracks or fissures in the cables, premature rusting or burns, or any of the above, send them back and request a new system. 

Use the Correct Voltage and Wattage

Incorrect voltage or wattage can lead your roof cables to become hotter than they need to be. Consult a pro in the know to find out what’s best for your setup. 

Hire a Trusted Pro for Installation

Although it’s technically possible to DIY a project like this, it’s better to hire a professional roofer near you instead because of the risks involved. 

Insulate Properly

When electrical wires are exposed to moisture, electrical shocks are bound to happen. That’s why it’s a good idea to insulate these wires so that there’s a line of defense between them and any and all liquids.  

Inspect Regularly 

It’s a good idea to test your system before winter and inspect it regularly throughout the months it’s in use. Keep an eye out for loose connections, crossed wires, or damaged cables, and turn off your system until it can be fixed if you find any of the above.