Potential Damages from Installing Solar Panels on a Roof (And How to Avoid Them)

Solar panels are a great long-term investment for Delmarva homeowners, but they come with a real risk most solar sales reps will not mention: a bad install can damage your roof in ways that take months or years to surface. By the time you notice the leak or the cracked shingle, the solar installer is long gone and the repair bill is yours.

Here are the 6 most common ways solar installs damage roofs on Delmarva homes, and how to make sure none of them happen to yours.

6 Ways Solar Installs Go Wrong

1. Leaks at Mounting Points

Every panel needs 4 to 8 mounting points. Each mounting point is a penetration through your roof. A quality installer flashes every penetration with a proper roof boot, sealant, and shingle re-weave. A cheap installer just lags through the shingle with a dab of caulk. The caulk fails in 2 to 5 years and you have a leak you cannot easily access because there is a solar panel covering it.

2. Cracked or Split Shingles from Foot Traffic

Installation crews walk your roof during the install. On older or aging asphalt, that foot traffic alone can crack shingles, especially in cold weather when shingles are brittle. A careful crew protects high-traffic zones with padded walkways. A rushed crew does not.

3. Voided Roof Warranties

Some shingle manufacturers void warranties as soon as a non-certified installer drills through their product. Translation: if a leak develops anywhere on your roof (not even necessarily at a solar mount), the manufacturer can refuse coverage. Confirm warranty preservation before signing the solar contract.

4. Trapped Moisture and Algae Under Panels

Panels cover sections of your roof and reduce airflow. On humid Delmarva summers, that creates a microclimate where moisture lingers longer than usual and algae growth accelerates. The shaded sections of the roof can age noticeably faster than the exposed sections.

5. Wiring Penetrations Not Properly Flashed

Solar systems need conduit and wiring runs that often penetrate the roof. These penetrations need just as much flashing detail as the panel mounts, but they are frequently treated as an afterthought. We have fixed leaks at wiring penetrations that the solar company swore were “sealed.”

6. Hidden Decking Damage Compounded by Panel Weight

If the deck under the panels had soft spots before installation, the added weight of the panels (plus any moisture infiltration) accelerates the decay. By the time you notice the sag, your structural fix gets expensive fast.

How to Prevent All of This

• Get an independent roof inspection before solar. See our pre-solar checklist for what should be covered.
• Verify your solar installer’s roofing-manufacturer certification (GAF Solar Elite, Owens Corning Preferred Installer, etc.).
• Get a written installer workmanship warranty for at least 10 years covering all penetrations (mounts AND wiring).
• Document the pre-install roof condition with dated photos. Have your roofer (not the solar company) do this.
• Be on-site during installation if possible, especially when penetrations get drilled.
• Inspect after install with your roofer before final payment.

What to Do If You Already Have Solar Damage

If you suspect a problem with an existing solar install (ceiling stains, attic moisture, lifted shingles around panels), do not contact the solar installer first. Call an independent roofer to document the damage. That documentation gives you leverage for warranty claims or repair-cost negotiations with the solar installer.

Frequently Asked Questions

How can I tell if a solar mount is leaking?

Check the attic directly under each mounting bracket. Water staining on rafters or insulation directly below a mount is the clearest sign. Also check ceilings of rooms directly below the array.

Will homeowners insurance cover damage from a bad solar install?

Usually not. Most policies exclude “faulty workmanship” claims. The solar installer’s workmanship warranty is your primary recourse, which is why getting one in writing matters.

Can damage be fixed without removing the panels?

Sometimes yes, sometimes no. Damage at mounting points usually requires panel removal. Damage in open shingle sections can often be repaired without touching the panels.

Get a Pre-Install Roof Inspection from G and Bros

The best way to prevent solar damage is to start with a roof that is ready and a solar installer who is certified. G and Bros offers free pre-solar roof inspections across Salisbury, Ocean City, and the entire Eastern Shore. Call us at 410-677-4975 or visit gandbrosroofing.com/contact. Read our pillar guide: Solar Panels and Your Roof: A Delmarva Guide.