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Why Is My Roof Leaking Around Solar Panels?

Last updated October 25, 2026

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The short answer

What Causes the Leak

Most leaks around solar panels start at the mounting points. The brackets that hold the panels to your roof are usually fastened with lag bolts or screws. Each of those fasteners creates a hole in your roofing material. If the installer didn't seal those holes with a proper flashing boot or high-quality sealant, water can work its way in over time.

The panels themselves can also be the problem. If the panel frames crack, if the rubber gaskets under the clamps dry out, or if the racking system shifts from wind or snow load, gaps can open. In a cold climate with freeze-thaw cycles, seals can loosen. That repeated expansion and contraction is a common reason leaks appear years after installation.

How to Spot the Leak

Look for water stains on your ceiling or walls directly below the panel array. In unfinished attics, you might see dark streaks on the roof sheathing or on top of the insulation. Check the attic after a heavy rain or during a thaw. If you have a low-slope roof, water can travel along the deck before it drips, so the stain may not be exactly under the leak.

  • Water stains on ceiling or attic sheathing
  • Cracked or missing sealant around mounts
  • Lifted or warped shingles near panel brackets
  • Rust or corrosion on flashing or screws
  • Damp insulation or musty odor in the attic

What You Can Do First

If you find an active leak, place a bucket under the drip and remove any wet belongings from the area. You can also cut away a small piece of wet drywall to expose the framing and help it dry. Keep the area ventilated with fans to reduce moisture buildup, especially in a cold climate where mold can start quickly.

Do not try to remove the solar panels yourself. They are connected to live electrical wiring, and the panels are heavy and fragile. Instead, turn off the system at the inverter if you know how, and leave the panel removal to a qualified solar installer. Your immediate job is to stop the water from spreading and document the damage for your insurance company.

When to Call the Pros

Local water damage pros can help with the interior damage, such as drying out wet framing, removing soaked drywall, and treating any mold that has started. They can also help you identify the source of the leak by looking at water stains and using moisture meters. That information is useful when you talk to a roofing contractor or a solar installer about the repair.

For the roof itself, you will likely need a roofer who has experience with solar mounts. They can re-seal or replace the flashing around the brackets, replace damaged shingles, and make sure the roof surface is watertight. A solar installer may need to remove and reinstall the panels so the roofer can do the work. In some cases, the leak is from the panel wiring penetration, which an electrician might need to fix.

Preventing Future Leaks

After a repair, inspect the seals around your solar mounts at least once a year. Look for cracks, gaps, or peeling sealant. In a climate with heavy snow, also check that snow guards are in place so ice dams don't form and force water up under the shingles. Keep your gutters clean so melted snow and rain drain away from the roof edge.

If you are having new solar panels installed, ask the installer about their waterproofing method before the work begins. A good installation uses flashing that integrates with your roofing material, not just a bead of caulk. Also, make sure the installer follows the manufacturer's instructions for your specific roof type. Your insurance company may have requirements for roof penetrations, so check your policy and ask questions before you sign anything.

  • Inspect seals and flashing every year
  • Clear gutters and downspouts before winter
  • Check for ice dams after heavy snow
  • Ask installers about their flashing method
  • Keep a record of all roof work and warranties

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Frequently asked questions

Can a solar panel leak be fixed without removing the panels?

Sometimes. If the leak is at a mounting bracket, a roofer may be able to re-seal the flashing from the outside without moving the panel. But if the panel itself or the wiring penetration is the problem, the panel likely needs to be lifted or removed. A solar installer can advise you after inspecting the setup.

Will my insurance cover solar panel roof leaks?

It depends on your policy and the cause of the leak. If the leak is from sudden damage like a fallen tree or a severe storm, it may be covered. Wear and tear or improper installation are often not covered. Policies vary, and your insurer decides what is covered. Contact your insurance company to discuss your specific situation.

How fast does mold grow after a roof leak?

Mold can start growing within 24 to 48 hours in warm, damp conditions. In a cold climate, it may take a bit longer, but it will still appear quickly if the materials stay wet. Dry the area with fans and dehumidifiers right away. If you see or smell mold, call a mold professional for safe removal.

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