How to Fix a Roof Leak Under Solar Panels?

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Solar panels provide renewable energy, but they also present some unique roofing challenges. One issue that can arise is roof leaks under the solar array. When water penetrates behind solar panels, it can cause serious water damage and even electrical issues. 

But how to fix roof leak under solar panels? Identifying and repairing leaks under panels requires some specialized techniques. Inspecting seals, performing water tests, adjusting panel positioning, adding flashings, and using sealants are all important steps.

With some diligence and the right approach, roof leaks under solar panels can be effectively diagnosed and fixed. This prevents expensive repairs down the road.

Inspect the Solar Panels and Rooftop

The first step is to inspect the solar panels and rooftop area to try to identify where the leak is originating. Look for any visible signs of moisture or water damage under the solar panels or around panel edges. Also, check the rooftop for damaged or missing GAF shingles, cracks, or other potential entry points for water. Use a ladder to get up close if needed.

Check Flashing and Seals

Flashing and seals around solar panel mounts, vents, and other rooftop equipment should also be examined. Flashing is sheet metal installed around roof joints and projections to prevent water entry. Over time, flashing can rust, crack, or become displaced. Check that flashing is still intact, sealed down, and overlapping shingles properly. Also, inspect any caulk or rubber sealants around panels for deterioration. Reapply sealant if needed.

How to Fix a Roof Leak Under Solar Panels? Consider Temporary Panel Removal

If the source of the leak cannot be found by visual inspection, temporary removal of solar panels in the problem area may be required. This should be done with care by a qualified solar installer to avoid damaging the panels or wiring. Safely prop up panels and look for water trails, damage, or any obvious leaks under the panel mounting area. Remove any debris or clogged drains. Reinstall panels securely.

Perform a Water Test

If the leak source is still unclear, conducting a water test can help identify problem areas. On a dry day, have someone spray water from a hose around panels, flashings, mounts, and roof joints while you observe inside for any drips. The water should flow around panels. Watch for water coming through at seams to pinpoint leakage entry points. Mark any leaks.

Make Needed Roof Repairs

Once the source of the leak is identified, make any repairs needed to the roof surface, flashings, or seals around panels. Replace any loose, damaged, or missing shingles that could be an entry point for water. Reseal any open seams or cracks. Add sealant around panel mounts or flashings as required. Make sure repairs overlap damaged areas at least 6 inches on all sides.

Adjust Solar Panel Positioning

In some cases, adjusting the tilt or positioning of solar panels may help route water away from leak areas. For roof-mounted systems, tilt and angle can be altered by changing mounting feet. This may require adding longer mounting rails or racking. Hire a solar company for complex adjustments or equipment changes.

Install Flashing Around Panels

If there are continuing leaks between the solar panels and roof surface, flashing installation may be needed. Flashing specially made for solar applications can be installed around the edges of the panel array. This helps deflect water away from sensitive panel edges and mounts. Hire a roofer experienced in flashings.

Apply Sealants and Caulking

Applying quality sealants and caulking around panel mounts, flashings, and roofing joints can help prevent leaks. Use a polyurethane roof sealant for standing water areas. For joints, a flexible silicone solar sealant is recommended. Sealants made for potable water are best. Completely clean and dry areas first for best adhesion.

Consider Panel or Roof Replacement

For recurring leaks or extensive damage, a full solar panel or roofing replacement may be required. If panels are old or warranty periods have expired, replacement may be the best option. For older roofs, major underlying leaks may necessitate roof replacement before installing new solar panels. Get quotes from solar and roofing companies.

Maintain the Roof and Panels

Once any leaks are repaired, regular maintenance helps prevent recurrence. Inspect flashings, seals, and roof surfaces around solar panels annually. Reapply caulk or sealants as needed. Trim overhanging tree branches. Keep the roof and panels free of debris and leaves which can clog drains. Address any new leaks right away before major damage occurs.

In Conclusion

Following proper inspection, testing, and leak detection techniques can help identify and repair roof leaks under solar panels. Addressing issues promptly prevents further damage. For complex roof or solar repairs, always contact qualified roofing and solar professionals. With the right approach, roof leaks can be effectively fixed even when solar panels are in place.

About RC Roofing

RC Roofing has over 40 years of experience installing and repairing residential roofs in the local area. Their skilled technicians can diagnose and fix any roof leak, even under solar panels. If you need an experienced roofer to find and repair a leak under your solar array, call RC Roofing today at (401) 298-9936 for quality roof repair services.

FAQs

Are roof leaks common with solar panels?

Roof leaks can occur with solar panel installations, but they are not inherently common if the system is installed correctly. Factors like roof age, improper flashing, and lack of maintenance can increase the risk of leaks around solar arrays over time.

How do you fix a leaking roof from underneath?

To fix a roof leak from underneath, start by locating the exact spot where water is penetrating through the ceiling by looking for water stains or using a moisture meter. Once the leak source is identified, repair it by patching or replacing any damaged shingles, resealing joints or seams, and adding flashing or sealants above the leak to prevent further water entry.