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Do Solar Panels Damage Roof

By Benjamin Strusnik March 15, 2022

Do Solar Panels Damage Roof

You have installed cutting-edge portable solar panels on your roof and are now generating your power. Congratulations! You are helping reduce your carbon footprint and saving money on your electric bill. But do solar panels damage roofs?

This is one of the most common questions people have when considering a solar installation. The truth is that installing solar panels on a roof can improve the lifespan of your roof. However, if they aren’t installed properly, they can significantly damage the roof.

When Solar Panels Damage the Roof

There are several instances where solar panels damage roofs. These include:

Improper Installation

The installation process of solar panels is critical. If they aren’t installed properly, they can cause leaks and other damage to the roof. This is why it is vital to hire a qualified and experienced contractor to install your solar panels.

For instance, if the installer drills large holes for lag bolts and doesn’t seal them properly, water can get in and damage the roof.

Age of Roof

will solar panels damage my roof

If your roof is nearing the end of its lifespan, it may not be able to support the weight of the panels. In addition, if your roof is already damaged, installing solar panels could exacerbate the issue.

Incorrect Sizing

Solar panels come in different sizes. If you install a solar panel that’s too big for your roof, it can cause cracking and leaking. Choosing the right size solar panel is essential to avoid damaging your roof.

Poor Quality Materials

If you use poor-quality materials when installing solar panels, it can cause the panels to break and fall off the roof. This can damage the roof and create a safety hazard to anyone standing nearby. 

It’s essential to use high-quality materials when installing solar panels on the roof.

How Solar Panels Protect Your Roof

Even though some situations can damage your roof, solar panels can protect your roof in many ways, including:

Bad Weather Protection

A solar panel protects your roof from bad weather. It acts as a barrier against wind, hail, and other elements. Additionally, solar panels help keep the roof cooler in the summer, which can prolong the life of your roof by limiting the strain extreme from heat.

do solar panels damage your roof

Cooling Effect

One important question most people ask is whether solar panels heat your roof.

The truth is that solar panels actually help keep your roof cool in summer. They reflect sunlight away from your house, which keeps the temperature down. This can prolong the lifespan of your roof by preventing heat damage.

The cooling effect of solar panels also helps reduce your air conditioning costs in the summer. 

Additionally, it can help prevent ice dams from forming on your roof in winter. This is because the solar panels reduce the amount of heat transferred to the roof from the sun.

A study done by UC San Diego found that solar panels can reduce a roof's temperature by up to 35% on a hot day.

Reduced Snow Load

Solar panels also help reduce the snow load on your roof. 

They act as a windbreak and help keep the snow from accumulating on the roof. This can prolong the life of your roof by preventing the excess weight from building up.

Solar Panels and Roof Warranties

One of the questions that most homeowners have when considering solar is whether the installation of solar panels will void their roof warranty. The good news is that most solar panel manufacturers offer a warranty on both the panels and the roof.

Most warranties cover damage to the roof caused by the installation of solar panels. However, you should always check with your manufacturer to ensure you are covered.

It's recommended that you only install solar panels on roofs no more than five years old. If your roof is older than that, you may want to consider replacing it before installing solar panels.

How Many Solar Panels Can Be Fitted on a Roof?

Knowing how many solar panels can fit on your roof will tell you roughly how much energy a solar system will generate.

do solar panels ruin your roof

The number of solar panels that can be fitted on a roof depends on the size of the roof and the type of solar panel, as well as other factors like roof pitch and direction. 

Solar panels come in different sizes, so you need to make sure you choose the right size for your roof. Additionally, most roofs can only support up to 15% of their total weight in solar panels.

This means that if your roof is 30 square feet, you can install up to four square feet of solar panels without affecting your warranty. However, if your roof is 50 square feet or more, you may be able to install up to six square feet of solar panels without voiding your warranty.

It's essential to ask your solar panel installer about the maximum number of panels that can be installed on your roof. They will also be able to recommend the best roof for solar panels.

Factors to Consider When Installing Solar Panels

There are many factors to consider when installing solar panels on your roof. They include:

Roof Type

The type of roof you have will determine the type and number of solar panels installed. For example, if you have a shingle roof, you will need to install a fixed mount solar panel.

If you have a tile roof, you will need to install a track-mounted solar panel. Similarly, a solar panel shingle roof mount should be used on a shingle roof.

Age of the Roof

solar panels on roof problems

The age of your roof is also essential to consider when installing solar panels. Most warranties only cover damage to the roof caused by the installation of solar panels. If your roof is more than five years old, you may want to consider replacing it before installing solar panels.


One crucial factor to consider is shading. Shading can affect the amount of sunlight that solar panels receive. If trees or other buildings shade your roof, you may not get as much sunlight as you would if it was in full sun.

Solar panel installers can help you determine the best location for your solar panels to maximize the amount of sunlight they receive.

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