If you want to switch to solar power, you might wonder how the panels are attached to your roof and whether the panels will cause roof damage as the years pass. The good news is that solar panel installation has been perfected over decades, so you don't have to worry about roof leaks when they're installed properly. Here's an overview of how solar panels are installed on an asphalt shingle roof.

The Roof Is Inspected First

The process starts with a roof inspection to see if the roof should be replaced and to check if the roof can hold the weight of the solar panels. It's best to have the panels installed on a fairly new roof because if your roof is old and will need to be replaced in a few years, the panels will have to come off to put the new roof on.

If you live in an older home, there might be a chance that your roof can't support the extra weight of the solar panels. This doesn't mean you can't put panels on your roof, it just means the roofer might need to add extra support so the weight won't be a problem.

The Mounts Are Bolted To The Rafters

Solar panels are attached to your roof with mounts that are bolted to the rafters. Bolting the panels to the rafters holds the panels more securely than just attaching the panels to the roof deck. The mounts are treated like any other type of protrusion through the roof. They are sealed and surrounded by flashing so there is a low risk of leaking. Plus, the solar panels partially cover the roof below, and that provides extra protection from rain.

The Solar Panels Are Attached To The Mounts

The final step in installing the solar panels is to connect the panels to the mounts. While doing this, the panels have to be slanted properly so they work efficiently. When the panels are ready, they are attached to the electrical wiring, and the rest of the work can be done to connect your solar power.

Your solar contractor may recommend you have the panels checked and serviced periodically, and you may need to clean the panels a few times a year if snow, leaves, or dirt cover them.

The process for solar panel installation has to comply with local codes. Codes take the local climate into consideration so the panels will withstand the typical wind, snow, and other weather conditions in your area. The exact process for installing the panels might vary in different regions and for different types of panels and roofing.