Solar and roofing: should you replace the roof first?
It is the single most expensive question a homeowner gets wrong on a solar project. Panels last 25 years or more. If the roof underneath them does not, you pay to take the whole array down and put it back up.
The short version
Fewer than about 10 years of roof life left? Re-roof first, ideally with the same project. More than that? Go straight to solar. Not sure? Get the roof looked at before you sign a solar contract, not after — an installer quoting you panels has no reason to raise it, and plenty of reason not to.
What it costs to get the order wrong
Removing and reinstalling an existing array so a roof can be replaced is its own job, with its own crew, its own electrical disconnect and reconnect, and its own inspection. It is not a small line item, and it is almost never covered by the roof warranty or the solar warranty — it falls squarely on the homeowner.
There is a warranty wrinkle too. Roofing warranties often depend on nothing being fastened through the roof by someone other than the installing roofer. Mounting an array on a roof that is already under warranty can quietly void it. When one company does both, that problem disappears — which is most of the real argument for hiring a company that offers solar and roofing together.
Four questions to ask a solar-and-roofing company
- 1
Who does the roofing — your own crew, or a subcontractor? Get the name of the roofing company either way.
- 2
What is the workmanship warranty on the roof, in writing, and for how long? Not the shingle manufacturer's warranty — yours.
- 3
If a leak appears around a panel mount in three years, who pays to pull the array and fix it?
- 4
Are you licensed for both trades in this state? Plenty of companies advertise both and are only licensed for one.
Finding a company worth calling
We do not publish a separate solar-and-roofing ranking, and we want to be straight about why: not enough homeowners ask that exact question for us to measure an honest, market-by-market list. Building one anyway would mean dressing up a handful of answers as a ranking, and that is not what this site is for.
What we do have is the measured list of solar companies ChatGPT actually recommends in each market. Start there, then ask the four questions above — most of the good ones either do roofing in-house or work with a roofer they will happily name.
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Common questions
Should I replace my roof before installing solar?
If your roof has fewer than about 10 years of life left, most installers will tell you to replace it first. Panels are designed to last 25 years or more. If the roof under them fails in year seven, someone has to take the whole array down, re-roof, and put it back — a bill that can run into the thousands and is rarely covered by anyone's warranty. If your roof is newer, or was recently replaced, you can usually go straight to solar.
Is it cheaper to use one company for both?
Often, yes — you are paying for one mobilization, one set of permits, and one crew on the roof instead of two. It also removes the finger-pointing problem: if the roof leaks around a mount, there is exactly one company responsible. The trade-off is that you are choosing one company on two skill sets, so both have to be good.
What should I ask a company that offers solar and roofing?
Four things. Who actually does the roofing — your own crew or a subcontractor? What is the workmanship warranty on the roof itself, in writing, and how long? If a leak shows up around a panel mount in three years, who pays to pull the array? And are you licensed for both trades in this state, not just one? A good company answers all four without hesitating.
Will a new roof affect my solar permits or incentives?
It can affect timing. Some jurisdictions want the re-roof permitted and inspected before the solar permit is issued, which adds weeks. Ask your installer to lay out the permit sequence for your specific city before you sign anything, so the schedule you're promised is the real one.
Do you run a company that does solar and roofing?
Homeowners asking ChatGPT about roof-and-solar projects are being sent to a handful of companies. Find out whether yours is one of them — free.
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