Installing solar panels is an incredibly smart move for many Arizona homeowners. With abundant sunshine, inflation, and rising energy costs, solar can significantly lower utility bills and boost your home’s value.
But there’s one important factor many homeowners overlook: how solar panels can impact the health of your roof. If panels are not installed properly or if your roof isn’t prepared ahead of time, you could be setting yourself up for expensive repairs down the line.
Before you go solar, here’s what you need to know to protect both your investment and your roof.
How Solar Panels Are Installed on Your Roof
Most solar panel systems are installed using mounting brackets that are bolted directly into your roof’s structure. These brackets must be securely attached to withstand wind, rain, and the weight of the panels.
To install them:
- Holes are drilled through your roofing material and sometimes the underlying decking.
- Flashing (a thin waterproof barrier) is added around the mounts to help seal against leaks.
- The panels are then attached to the racking system secured to these mounts.
While experienced solar installers take precautions to minimize risks, the simple fact is any time you penetrate the roofing system, you increase the chance of future water intrusion.
Common Roofing Problems Caused by Solar Panel Installations
If solar panels are not installed correctly, or if your roof is already aging, several problems can arise:
- Leaks and Water Intrusion – If flashing is improperly installed or wears out over time, water can seep through the mount points and into the underlying roof structure. Leaks might not be immediately obvious, but over time, they can cause:
- Mold and mildew growth
- Wood rot in decking and rafters
- Ceiling stains and water damage inside the home
- Added Weight on an Aging Roof – Solar panels are relatively heavy. If your roof is already nearing the end of its lifespan, the added load can cause sagging or structural stress, especially on older trusses or decking. Foam and flat roofs must be particularly strong to accommodate the extra weight without developing low spots or drainage issues.
- Damage to Roofing Materials – Some types of roofing, especially foam or older shingle roofs, are more vulnerable to cracking or compression damage from the mounting process. If your roof’s surface is already brittle from UV exposure, drilling into it can accelerate deterioration.
- Shortening Your Roof’s Remaining Lifespan – If you install solar panels on an aging roof, you might find yourself needing a full roof replacement long before your solar panels reach the end of their useful life (which is usually 25–30 years). This can be a costly headache, requiring removal and reinstallation of the solar system when you reroof.
How to Protect Your Roof Before Going Solar
The good news is that with some smart planning, you can enjoy the benefits of solar without risking your roof. Here’s how:
Get a professional roof inspection first.
Before installing solar, have a licensed Phoenix roofer (not just the solar company) inspect the condition of your roof. They can spot problems that should be addressed beforehand.
Replace or repair aging roofs before installation.
If your roof has less than 10 years of life left, it’s often better to reroof now before adding solar. It saves money and avoids major disruption later.
Work with reputable, experienced solar installers.
Choose companies that have proven experience properly flashing and sealing solar mounts, and who understand how to minimize roof damage.
Plan for future maintenance.
Your roof still needs inspections even after solar is installed. Keep an eye on mounting points and flashing over time to catch potential issues early.
Final Thoughts: Solar and Your Roof Should Work Together
Solar energy is an incredible investment for Arizona homeowners but only if it’s done right. Protect your home by making sure your roof is strong, healthy, and properly prepared before your panels go up.
At JBS Roofing, we offer professional roof inspections and reroofing services designed to work with solar installations, not against them. If you’re thinking about going solar, schedule an inspection with us first so you can move forward with confidence.
