Solar Panels and Roof Maintenance
Panels and roofing share the same surface for twenty-five years, and the order you do them in decides what that costs.
Solar went up on a great many West Los Angeles roofs over the past decade, often on houses whose roofs were already fifteen or twenty years old. The panels are fine. The roof underneath them is on its original clock, and that is where the expensive surprises come from.
The sequencing problem
A solar array is typically warranted for twenty-five years. Composition shingle in this climate is good for eighteen to twenty-five. If the roof was a decade old on install day, the roof will need replacing with fifteen years still left on the panels — which means paying a solar contractor to detach the array, store it, and reset it after the roofing crew is done. That detach-and-reset is a real line item, and it is money that buys you nothing except access to your own roof.
Anyone installing panels on a roof with less than ten years of life left should be telling you this plainly. If they did not, you are not the first. The fix now is to plan for one combined event rather than two separate ones.
What panels do to the roof beneath
- Every mount is a penetration through the waterproofing, and those flashings are the first thing to check after any leak
- The shaded area under the array stays damp longer after rain, which favors moss and debris rot on the north side
- Leaves and windblown debris collect under the panels where no one sees them and water cannot drain
- Rodents and birds nest in the gap between panel and deck, and the damage they do to wiring and shingle is routine in the Valley
- Inspection access is limited, so problems progress further before anyone notices them
Maintenance that actually matters
Clear under the array, not just on top of it. Critter guard around the perimeter is inexpensive and prevents the most common damage we see. After the first heavy rain each season, check the ceilings below the array specifically — a mount flashing that has backed off will show there first. And if a panel is ever removed for electrical work, have somebody look at the shingle and the flashing while it is off, since that access is free at that moment and costly to arrange later.
If you are planning solar now
Get the roof dated before you sign. If it has under ten years left, do the roof first — the tear-off is cheaper without an array on it, and you start the panel clock and the roof clock together. If the roof is newer, ask the solar contractor which flashing system they use at the mounts and get it in writing. The difference between a proper flashed mount and a sealant-dependent one shows up around year eight, and by then the installer may be a different company or none at all.
Common questions
Can roofing be done without removing the panels?
Not a full replacement. Small repairs at the perimeter sometimes, but anything involving the deck under the array requires removal.
Who is responsible if a mount leaks?
The solar installer, usually, and their workmanship warranty is the document to find. In practice the roofer gets called first because the symptom is a ceiling stain. Keep both sets of paperwork together.
The honest summary
Panels do not damage a good roof, but they make a tired one much more expensive to replace. Date the roof, do it first if it is close, and keep the area under the array clear — the problems that cost money down there are the ones nobody looked at for ten years.
Free inspection, drone photography where access is difficult, and a written estimate with deck repair priced per sheet. No obligation.