How to Tell If the Roof Under Your Solar Panels Needs Replacing

If you’re one of the many New Jersey homeowners who went solar years ago, you might be wondering: Is my roof still in good shape under those panels?

It’s a smart question — and an important one.

At SLM Solar, we specialize in Removal, Reroof, and Reinstallation (R&R) services. That means we work with homeowners who already have solar, but now need a new roof. Here’s how to know when it’s time to act.

Moss growth and shingle discoloration are two clear signs a roof may need replacing.

1. You Had Solar Installed Over 10 Years Ago

Most asphalt shingle roofs last about 20 to 30 years — but adding solar doesn’t pause the clock. If your panels were installed over a decade ago and your roof wasn’t brand new at the time, it may be reaching the end of its lifespan.

Look back at your solar paperwork or home inspection report. If your roof was more than 10 years old at install, it’s time to have it evaluated.

Many racking systems installed 10+ years ago were overly invasive and often caused damage to the shingles under the solar installation. Solar technology has made many improvements over the last decade, and SLM Solar makes use of the latest in racking and rooftop advancements. Every system we reinstall receives new mounting hardware to maximize the lifespan of your roof.

2. You’re Seeing Signs of Roof Trouble Around the Panels

Some clues are visible from the ground:

• Sagging rooflines

• Shingles curling, cracking, or missing

• Dark spots or algae streaks

• Debris buildup or water pooling around panel edges

• Critter nests under your solar array.

Solar panels can hide damage — or even trap moisture in rare cases. Critters such has squirrels have been known to nest under solar systems and gnaw through the shingle and plywood of your roof (ask about our CritterGuard installation process). If you’re seeing issues near your solar system, it may be worse underneath.

3. You’ve Had Leaks Inside the Home

Water damage is often the first sign that something’s wrong beneath the surface. If you’ve noticed leaks in your attic or upper floors — especially under where your panels are mounted — it’s time to investigate.

A small leak now can turn into major roof damage later, and addressing it means removing the system to reach the issue.

Water damage on your ceiling may be a clear indicator of a roof leak.

4. Your Roof Warranty Is Expiring

Most roof warranties last 20–25 years. If yours is nearing expiration, it may make sense to proactively reroof while you still have coverage or before more serious problems begin.

Replacing the roof now can also help extend the life of your solar panels — and reduce future headaches.

5. A Roofing Contractor or Inspector Raised a Red Flag

If a home inspector or roofer has advised you that your roof is aging or soft beneath the panels, take it seriously. Not every roofer has experience working around solar, and not all electricians have experience with rooftop solar. It is important to use a licensed, insured solar professional to ensure your system receives the specialized attention it deserves.

If You Have Solar and Your Roof Needs Replacing, What Can You Expect?

If your roof does need replacing, don’t worry — you won’t lose your solar investment. Our R&R service is designed to protect it.

We’ll:

• Check the terms of your agreement if you are engaged in a Lease. It is important to use contractors approved by the leaseholder to avoid voiding warranties or accruing fines. SLM Solar is partnered with most major lease holders in New Jersey.

• Carefully remove your system and store it on-site

• Coordinate the reroof through a trusted contractor

• Reinstall your solar panels using fresh racking and hardware

• Ensure your system is fully functional and protected moving forward

And because we’re licensed, bonded, and experienced in solar-specific reinstallation, you can expect clean work and fast turnaround. We even offer a one year Workmanship Warranty on all reinstallation projects.

Final Thoughts

Your roof is what protects your solar investment — and your home. Ignoring signs of wear can lead to leaks, electrical damage, or full system shutdowns.

If you think your roof might be due for replacement, or you just want a professional evaluation, we’re here to help.

Call or text SLM Solar at 765-276-6952

Or visit www.slmsolarnj.com to request an R&R evaluation

We’ll give you an honest answer — and a smart plan forward.