A solar array does not wear out a roof. The sales rep has that part right, which is also why the roofer san diego ca homeowners phone three years after the panels went up so often tells them to call the solar company first. Twenty-six-year-old shingles under a new seven kilowatt array are still twenty-six-year-old shingles, except now there are roughly eight hundred pounds of glass and rail sitting on the part that needs replacing. The argument here fits in one sentence: tearing the roof off before the panels go up costs less than paying a crew to lift that array off and set it back down four years later. Four decades of pulling shingles off San Diego houses, and this is still the sequencing mistake that costs owners the most money.
Panels Mount Fine Over A Roof That Is Failing
Mounting hardware does not care what shape your shingles are in. Lag bolts go through the deck into the rafters, the feet get flashed, the rails go on, and the array is level and producing by dinnertime whether the underlayment below it has six years left or six months. None of that is a roof inspection. What I keep running into is an owner who figured the site survey covered the roof, because somebody walked it with a tablet and took photos. That survey was measuring azimuth, shade and rafter spacing, and it was a fine survey for what it was for.
Shingles laid in the late nineties around here are usually finished, curled at the edges, granules washed off the south slope, mat starting to show through. A roof in that condition can hold panels for years without dripping once. Then a February storm finds the one nail hole that finally opened up, and a stain shows on a bedroom ceiling under an array nobody wants to touch. By then no one can reach the leak without pulling modules.
Removal And Remounting Never Appears In The First Quote
Solar proposals price what goes on the roof. They do not price what has to come back off. The figures EnergiSense published in May 2026 pegged removal and reinstallation on the same roof at $200 to $500 per panel, which works out to $4,000 to $12,000 on a typical 15 to 30 panel residential system. On the seven kilowatt house I keep coming back to, eighteen panels, the middle of that band lands near $6,300. Call it $7,500, honestly, once the electrician’s disconnect and recommission day is on the invoice and you have rented the same dumpster twice.
Ten years ago this was a smaller problem. A four kilowatt system, twelve panels, one string inverter and a single conduit run, and a two-man crew could have the whole thing off the deck before lunch. Today the same house takes eighteen or twenty panels, a microinverter under each one, a battery on the garage wall and a rapid shutdown system, and every piece of that has to be logged, disconnected, then commissioned again afterward. The second bill is never the roof, it is the array coming off and going back on. That bill also shows up at the worst possible moment, on a roof that is already leaking into the house.
The Order Of Operations Crews Wish Buyers Knew
The sequence itself is not complicated. Tear off to the deck, replace anything soft, dry in with new underlayment, run the flashings and the valley metal, and only then set the mounts into rafters with the roof warranty already covering every penetration. One contractor holding both halves means the array gets planned before the first shingle goes down, so the rails miss the valleys and the panel layout does not fight the ridge vent. Ask whoever is bidding whether the leak warranty on those mounting penetrations comes from the roofing side or the solar side, and how many years it runs. On most jobs that one question tells you who will still answer the phone in year seven.
One thing is not up for discussion. Rooftop solar DC wiring stays energized any time the sun is on the panels, so loosening clamps or lifting modules is never a homeowner project, even with the inverter switched off at the wall. The Electrical Safety Foundation International recommends that all electrical work, rooftop solar included, be handled by a qualified electrician who is licensed, insured and bonded and who pulls the required permits. Fall exposure and roofing work sit on that same square of shingle, which is the plainest argument for a single crew carrying both licenses rather than two companies pointing at each other.
Reroof First, Then Let The Sun Pay
Sequence beats savings on this one. The homeowner who reroofs first pays for one tear-off, one set of permits and one mobilization, and the array goes onto a deck that will outlive the panel warranty. The owner who does it backward pays for that tear-off later anyway, plus removal, plus reinstall, plus whatever the water did to the drywall while everyone argued over who owned the penetration. Before you sign the solar contract, get the roof’s remaining life in writing from a roofer San Diego CA homeowners already use for tear-offs, and hand that number to the solar rep. The sun is patient; those shingles are not.
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