Installing Solar Panels in San Antonio Without Shortchanging Your Roof
Solar is a long commitment for your roof. Before panels go up, the roof under them needs to be ready to last as long as they do. Here is how to plan it.
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Start with the roof, not the panels
Solar panels are bolted to the roof through mounts that pass into the rafters or decking. Once they are in place, the roof under them is hard to reach. If shingles under the array wear out or take hail, the panels have to come off before anyone can fix them. That adds time and cost to a roof job that would otherwise be simple.
The best time to settle the roof question is before the solar contract is signed. An honest inspection answers whether the roof can carry the array for the long run, needs repair first or should be replaced.
That inspection should also look at the attic. Stains on the decking, damp insulation or poor ventilation all point to problems that are cheaper to fix while the roof is still clear. The same goes for flashing at walls and chimneys near where panels will sit.
What the local data suggests
Older housing stock
Half of the homes in San Antonio were built before 1985 (U.S. Census Bureau, American Community Survey 2020-2024). Many roofs on those homes have already been replaced once and may be due again.
Owners decide
About 52 percent of homes in the city are owner occupied, per the same survey. Renters cannot approve solar on a roof they do not own.
Large hail is part of the record
NOAA's Storm Prediction Center logged 48 hail reports of 1.75 inches or more within 10 miles of San Antonio from 2015 through 2024, with a top size of 4.5 inches.
A pre-solar roof checklist
How old is the current roof, and what is it made of?
Are there soft spots in the decking where mounts would go?
Is the flashing at walls, chimneys and vents in good shape?
Does the attic show any past or active leaks?
Would it make sense to replace the roof now, while it is clear of panels?
Is the ventilation adequate, so heat under the panels does not age the shingles faster?
How GemSco plans a solar project
Roof inspection
We start with a roof inspection in San Antonio to confirm the roof condition and material.
Roof work if needed
Repairs or a roof replacement in San Antonio are done first, so the array goes on a sound surface.
Layout and mounts
Panels are placed with attention to vents, valleys and roof edges, and each mount is flashed and sealed.
Installation
Panels go up on the planned layout and the roof is checked around every penetration.
Free estimate first
Every step starts with a written estimate. Financing is available.
Hail, panels and the years ahead
Large hail fell near San Antonio in 2016, 2020, 2021 and 2024. Panels are built to handle impact, but hail of 4.5 inches, like the stone reported on April 12, 2016, can still break glass and damage the shingles around the mounts. After any hailstorm, check both the panels and the roof.
If the roof needs work later, GemSco also handles solar panel removal and reinstallation in San Antonio. Read how Texas heat affects asphalt shingles, learn more about our solar panel installation service, or see GemSco in San Antonio.
Frequently Asked Questions
Can solar panels go on a tile roof in San Antonio?
Yes, but tile needs extra care. Tiles can crack when walked on or drilled, and mounts must be flashed so water does not reach the underlayment. The underlayment under older tile may also need attention before panels go on, since it is hard to reach once they are installed.
How do I know if my roof is too old for solar?
If the roof is past the middle of its expected life, has curling or cracked shingles, or has had repeated leaks, it is likely better to repair or replace it first. An inspection with photos gives you a clear answer before you sign a solar contract.
Does adding solar affect my roof insurance?
It can. Some policies treat panels as part of the dwelling, others need them listed separately. Ask your insurance agent how panels are covered and whether hail damage to them is handled the same way as damage to the roof before installation.
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