Quick answer: Before installing solar panels, get a roof condition assessment — most solar installers won’t (and shouldn’t) mount panels on a roof with less than 10-15 years of remaining life, because removing and reinstalling a 20-30 panel array to fix a roof underneath costs $2,000-$5,000 in labor alone. If your roof is more than 12-15 years old, replace it first, then go solar.
Solar adoption is climbing across metro Atlanta, and homeowners in Marietta, Roswell, Woodstock, Alpharetta, Johns Creek, Cumming, Duluth, Canton, Smyrna, Buckhead, Acworth, Austell, and Kennesaw are increasingly asking roofers — not just solar companies — for guidance before signing a solar contract. That’s the right instinct. The roof is the foundation the entire solar investment sits on, and a mismatched timeline between roof life and panel life is one of the most expensive mistakes a homeowner can make.
Why Roof Condition Matters More Than Panel Brand
Solar panel systems are warrantied for 20-25 years. Asphalt shingle roofs, depending on material and installation quality, typically last 20-30 years. The problem arises when a homeowner installs solar on a roof that’s already 15+ years old: within 5-10 years, that roof will need replacement, and the solar array has to come down first. Racking, flashing, and panels must be removed, the roof replaced, then everything reinstalled and re-inspected — often by a different crew than the original installer, which can create warranty gaps.
A roofing contractor evaluating a home for solar readiness looks at:
- Remaining shingle lifespan and current wear (granule loss, curling, brittleness)
- Decking condition underneath — soft spots or water staining signal deck issues that panels would hide
- Roof pitch and orientation relative to sun exposure
- Existing penetrations (vents, chimneys) that affect panel layout and flashing points
Flashing and Penetrations: Where Solar Installs Go Wrong
Every solar mounting point requires a roof penetration, and every penetration is a potential leak point if not flashed correctly. This is the single most common cause of solar-related roof leaks we get called out for. Solar installation crews are experts in electrical systems and racking — they are not always roofing specialists, and lag bolts driven into rafters without proper flashing boots or sealant maintenance can leak within a year or two, often undetected in the attic until staining or mold appears.
Best practice: have a licensed roofing contractor inspect and, where needed, re-flash penetration points either before or immediately after solar installation, and build a follow-up roof inspection into your annual home maintenance — not just a general once-over, but a specific check of every mounting bracket and flashing seal.
The Right Sequence: Roof First, Solar Second
If you’re planning solar and your roof is approaching or past the halfway point of its expected lifespan, replace the roof first. It’s more cost-effective to install new panels on a new roof once than to pay removal and reinstallation fees later. If your roof is newer (under 10 years) and in good shape, a pre-solar inspection to confirm decking integrity and flashing readiness is usually enough.
LB Roofing & Construction has served metro Atlanta since 2008, handling roof repairs, full replacements, new construction roofing, and emergency leak response — including solar-readiness inspections and post-installation flashing checks for homeowners across Marietta, Roswell, Woodstock, Alpharetta, Johns Creek, Cumming, Duluth, Canton, Smyrna, Buckhead, Acworth, Austell, and Kennesaw. We’re a 2026 Expertise.com Best Roofers in Atlanta award winner, a CertainTeed Master Shingle Applicator, A+ BBB Accredited, and carry $1M in general liability insurance, with a 4.7-star average across 66 Google reviews.
FAQ
How old can a roof be before installing solar panels?
Most roofing contractors recommend at least 10-15 years of remaining roof life before installing solar. If your shingles are already past 15 years old, plan for replacement before or alongside the solar install to avoid costly panel removal later.
Do solar panels void a roof warranty?
It depends on your roofing manufacturer and installer. Many manufacturer warranties allow rooftop solar if penetrations are properly flashed and installed by a certified roofer, but improper installation by a non-roofing solar crew can void workmanship coverage. Always confirm with your roofing contractor before installation.
Who should inspect roof penetrations after solar installation?
A licensed roofing contractor, not the solar installer, should verify flashing and sealant at every mounting point. This is best done at installation and again during your next annual roof inspection.
Serving metro Atlanta since 2008. Call LB Roofing & Construction at 404-875-6222, Monday-Saturday 8AM-7PM (closed Sunday), or visit lbroof.com.