Replace Your Roof Before Solar Panels? An LA Homeowner Guide
Replace your roof before solar panels if it's over 15 years old. Reroofing after install adds $1,500 to $4,500 to remove and reset panels in LA.
If your roof is more than 15 years old or your asphalt shingles are near the end of their life, replace the roof before you install solar panels. Waiting until after the panels are up means paying $1,500 to $4,500 later just to remove and reset them so the roof can be redone. That extra cost is avoidable, and at Best LA Roofing we get calls about it every summer once homeowners realize their new panels are sitting on a worn-out roof.
Solar panels last 25 to 30 years. An asphalt shingle roof in Los Angeles usually lasts 20 to 25 years. If those two timelines don’t line up, you end up paying twice. A free roof inspection before you sign a solar contract tells you which side of the line you’re on.
The Short Answer: Match the Roof’s Life to the Panels
The panels and the roof under them need to age out together. Solar hardware is bolted straight into your roof deck and stays there for decades. If the roof gives out first, everything on top has to come off.
Here’s the simple rule. If your roof has 10 or more good years left, you can put solar on it now. If it has fewer than 10 years left, replace it first. A roof that’s 18 years old with curling shingles will not make it to the end of a 25-year solar warranty.
Getting a straight read on your roof’s remaining life is the whole game here. That’s what a professional roof inspection is for.
How Old Is Your Roof? That’s the Deciding Factor
Age tells you most of what you need to know. Use these brackets as a starting point for an LA home.
- Under 8 years old: Your roof is fine. Go ahead with solar.
- 8 to 15 years old: Have it inspected. A sound roof can take panels. A marginal one should be watched or replaced.
- 15 to 20 years old: Replace it first. You’re too close to the end to risk it.
- Over 20 years old: Replace it, no question. Panels on a roof this old will outlive the shingles by years.
LA heat shortens roof life. Homes in the San Fernando Valley, where summer days run 10 to 15 degrees hotter than the coast, bake their shingles harder than homes in Santa Monica or Culver City. A valley roof at 17 years is often more worn than a westside roof at the same age.
Why Reroofing After Solar Costs More
You cannot reroof with panels bolted on. The panels block the shingles, the mounting feet punch through the deck, and the wiring runs across the surface where new underlayment has to go. Everything comes off, then goes back on.
That solar removal and reinstall runs $1,500 to $4,500 on top of the roof job, depending on how many panels you have and how the system is wired. A battery adds another $500 to $1,200. We break the full process down in our guide to removing and reinstalling solar panels for a roof replacement.
Do the roof first and you skip that cost entirely. You also avoid the finger-pointing that happens when a leak shows up and the solar company and the roofer each blame the other.
What a New Roof Before Solar Costs in LA
Here’s what you’d spend replacing the roof up front, before any panels go on. These are typical ranges for an average Los Angeles home.
- Architectural asphalt shingles: $9,000 to $18,000
- Concrete or clay tile: $20,000 to $45,000
- Standing seam metal: $25,000 to $50,000
Asphalt is the most common choice under solar because it’s affordable and easy for solar crews to mount into. A full roof replacement at $9,000 to $18,000 plus solar on a fresh deck is almost always cheaper than solar now, then a reroof and a $3,000 panel reset in ten years.
A proper estimate should include tear-off of the old roof, new underlayment, flashing, permits, and cleanup. If a bid leaves those out, the price will climb once work starts.
Which Roofing Materials Hold Up Best Under Solar
Asphalt shingle is the workhorse for solar in LA. Solar installers mount to it every day, penetrations seal cleanly, and the asphalt shingle roofing cost keeps the combined project reasonable.
Tile is a different story. Clay and concrete tile can absolutely carry solar, but installers have to remove and cut tiles around each mount, which raises the solar labor cost by a few thousand dollars. The upside is tile lasts 50 years or more, so the roof will easily outlive the panels.
Metal roofs pair well with solar too, since clamps can attach to standing seams without any penetration at all. Metal costs more up front but rarely needs to come off again.
Whatever material you pick, put it down first. For a longer look at how each material ages here, see how long a roof lasts in California.
Get a Roof Inspection Before You Sign the Solar Contract
Solar salespeople don’t inspect roofs. Their job is to sell panels, and most solar contracts say nothing about the condition of the roof underneath. That leaves you holding the risk.
Before you commit, have a roofer look at the decking, flashing, and shingle wear. A 20-minute inspection can save you thousands. If the roof needs work, do it while the surface is still bare. If it’s solid, you get to install solar with confidence that it won’t have to come back off.
Frequently Asked Questions
Do I really need to replace my roof before solar panels?
Only if the roof is worn or near the end of its life. A roof with 10 or more good years left can take panels now. A roof over 15 years old, or one with curling and cracked shingles, should be replaced first so you don’t pay to remove the panels later.
How much does it cost to remove and reinstall solar panels for a roof replacement?
Between $1,500 and $4,500 in LA, depending on the number of panels and the wiring. A battery system adds $500 to $1,200. Doing the roof before solar avoids this cost completely.
How long do solar panels and roofs last?
Solar panels last 25 to 30 years. An asphalt shingle roof in Los Angeles lasts 20 to 25 years, and less in the hot San Fernando Valley. Tile and metal roofs last 50 years or more, so they outlast the panels easily.
What roof is best for solar panels in Los Angeles?
Architectural asphalt shingle is the most common and affordable base for solar. Metal works well because clamps attach without roof penetrations. Tile carries solar fine but raises install labor because tiles must be cut around each mount.
Will installing solar void my roof warranty?
It can if the roof is old or the mounting is done poorly. Installing solar on a new roof keeps both warranties intact. Always confirm the solar mounts are flashed and sealed to your roofer’s standard.
The Bottom Line
Replace your roof before solar panels if it’s more than 15 years old or the shingles are worn, because reroofing after install costs an extra $1,500 to $4,500 to pull and reset the panels. A new asphalt shingle roof runs $9,000 to $18,000 on an average LA home, tile runs $20,000 to $45,000, and any of them should go down first so the roof and the 25-year panels age out together. Given how hard valley heat wears shingles, a quick inspection is the cheapest way to know where your roof stands before you sign anything.
Call Best LA Roofing at (818) 446-6122 for a free roof inspection before your solar install.