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Roofing in Stockton, CA

Repair, replace, or just find out what’s wrong. We look before we quote.

A Grandmark crew member walking a finished composition shingle roof in Stockton, with the evaporative cooler reset on the ridge and new gutter along the edge

1,200+ reviews · 4.8★ on Google Licensed & insured · CSLB #1030917

Stockton, Lodi, Manteca, Lathrop and Tracy.

Calls answered 24 hours. Free inspection for homeowners.

  • $800+Single-issue
    repairs
  • $9–13Per sq ft,
    composition shingle
  • $14–20kTile lift & relay,
    tile reused
  • FreeInspection,
    recorded on video
  • Solar panels come off and go back with our own crew, electrical included
  • Rooftop units flashed properly, not sealed over and hoped for

Find out what’s actually wrong

Two minutes, three questions. We come out, record what we find, and show you.

Free for homeowners · $299 for real estate transactions

Licensed & InsuredCSLB #1030917
GAF Master EliteFEWER THAN 3% OF U.S. ROOFERS
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What actually fails here

Sealed is not the same as flashed

Look at the two job photos further down this page. One is a rooftop unit with mastic troweled around the plenum. The other is a metal patch beside a solar array, smeared over the top. Different houses, different trades, same instinct: something was leaking, so somebody put goo on it.

Sealant is not a roofing detail. It is a consumable. It has a service life measured in a few years, it is working against sun and thermal movement the whole time, and when it lets go the water goes exactly where it was always going to go — except now there’s a layer of hardened compound on top making it harder to see and harder to fix.

Flashing sheds water by shape. Sealant just delays it.

A proper penetration detail works because of how the metal is formed and lapped, not because of what was squeezed into the gap afterwards. That is the difference between a repair that lasts twenty years and one that gets you to next winter.

Something is leaking

A stain, a drip, a wet patch after the first real rain. Usually one flashing, one valley or one penetration — a repair in the $800–1,500 range rather than a roof.

How we track down a leak →

The roof is genuinely done

Composition at the end of its life runs $9–13 a square foot. On tile it’s usually a lift-and-relay at $14,000–20,000 rather than a full tear-off. We find out which before pricing anything.

When replacement is the right call →

You just want it checked

Buying, selling, or holding somebody else’s quote and unsure about it. Free for homeowners, recorded, and the footage is yours either way.

Get a second opinion →

The other trades

A lot of Stockton roofs have solar on them now

Solar went onto an enormous number of roofs around here, and the arrays are frequently newer than the roofs underneath them. That creates two problems at once.

The first is the obvious one: twenty-five-year panels sitting on a roof with a fraction of that left. Eventually the roof needs work and the panels are in the way. The second is that mounting an array means putting fasteners through the roof, and a penetration that wasn’t flashed properly on day one is a leak waiting on a wet enough winter.

Most roofing companies won’t touch panels. That’s why these leaks sit for years — the roofer says call the solar company, the solar company says it’s a roofing issue, and the homeowner keeps a bucket in the hallway.

We take the array off, fix what’s underneath and put it back, electrical disconnect and reconnect included. One company, one price, nobody to point at.

Rooftop HVAC is the same story from a different direction. Units get set on a roof and the roofing around them never gets properly detailed — and then somebody comes back later and seals the gap instead of flashing it. We re-roof around the curb so the water is being managed by the roof rather than by a bead of compound.

Three real Stockton jobs

What we found, what we did, what it cost

Leaking under the solar array — $4,500

Panels on an older roof, with a metal patch beside them slathered in sealant by somebody who came before us. The patch was the tell — it meant the leak had already been found once and covered rather than corrected.

We took the panels off, dealt with what was actually letting water in, and reset the array. Forty-five hundred, and no second contractor involved at any point.

A solar array on a Stockton shingle roof beside a metal patch coated in smeared sealant

The air conditioner nobody roofed back in — $3,500

A rooftop unit and duct plenum with mastic troweled all around where the flashing should have been. This is the one we find constantly: the HVAC install goes in, the roofing around it is never properly tied in, and when it leaks the fix is more sealant.

We stripped it back and re-roofed around the curb so the detail sheds water by shape instead of by compound. Thirty-five hundred, and it stops being an annual conversation.

A rooftop unit and duct plenum on a Stockton shingle roof, sealed with smeared mastic instead of proper flashing

Full replacement on a 1,800 square foot home — $16,500

The photo at the top of this page. Composition shingle across the whole house, new gutter, and the evaporative cooler taken off and reset on the finished roof rather than left for somebody else to deal with.

Sixteen thousand five hundred, on a home of roughly eighteen hundred square feet, written and agreed before we started. Your roof area isn’t the same as your floor area — pitch and overhangs make it larger — so we measure the roof rather than quoting off the house size.

This is what it looks like when nothing on the roof needed a workaround.

If you’re collecting quotes

Comparing roofing companies in Stockton

Most people looking at roofing companies in Stockton are holding one quote and trying to work out whether it’s honest. Here is what separates them, and all of it works on us as well as on anybody else.

Ask whether they’re flashing it or sealing it

This is the Stockton question. If the plan for a leaking penetration is caulk, mastic or a patch, ask what happens when that compound reaches the end of its life — because it will, and sooner than you think. A proper detail sheds water by shape. Anything else is a countdown.

Ask whether they’ll touch your solar

With as many arrays as there are on roofs here, this eliminates a lot of companies quickly. If they won’t pull panels, either the job doesn’t happen or you’re managing two contractors and their disagreement.

Run the licence

Ours is CSLB #1030917. Put it into the state’s Check A License tool and you’ll see status, bond and workers’ compensation in about thirty seconds. Do the same to everyone else who quoted you.

Make them show you the failure

Not the roof — the failure. We record every inspection and hand over the footage unasked, because a homeowner who can see the problem doesn’t have to trust anybody about the fix.

Written, flat-rate, before anyone starts

Every figure on this page — $3,500, $4,500, $16,500 — was agreed in writing before work began.

Any company worth hiring answers all five without hesitating. That’s the real difference between roofing companies in Stockton, and it has very little to do with which one came in cheapest.

How we cover Stockton

A service area, and we’ll say so plainly

We don’t have a Stockton office. We’re not going to drop a pin in the middle of town and imply otherwise, because that’s the oldest trick in local search and you deserve better than it.

Stockton is a service area covered by our crews, on a 209 number that reaches us directly. Same crews, same pricing, same standard as every job on this site. If you’d rather hire somebody with a storefront nearby, that’s reasonable — we’d just ask you to run their licence and make them show you the failure before you sign anything.

Our physical offices and established markets are listed on the service areas page, and there’s more about how we work on the about page.

Hours

Open 24 hours — calls answered and booked live, day or night.

Coverage

Stockton, Lodi, Manteca, Lathrop and Tracy.

No Stockton address, because we don’t have one. Licensed, insured and working under CSLB #1030917 either way.

Straight answers

Stockton roofing questions

Do you actually have an office in Stockton?

No, and we won’t pretend to. Stockton is a service area covered by our crews on a 209 number. Our physical offices are elsewhere in the Valley and they’re listed on the service areas page rather than hidden.

Someone sealed my roof leak and it came back. Why?

Because sealant is a consumable, not a roofing detail. It has a few years in it, it’s fighting sun and thermal movement the whole time, and when it goes the water returns to exactly where it was always headed. A proper flashing sheds water because of how the metal is formed and lapped. That’s the fix.

My roof leaks under the solar panels. Can you fix it without the solar company?

Yes. We remove the panels, correct what’s underneath and reset them, electrical disconnect and reconnect included. On one Stockton job that was $4,500 with no second contractor involved.

The leak started after my AC was installed. Is that a roofing problem?

It becomes one. Rooftop units get set down and the roofing around them never gets properly tied in, and then the eventual fix is more sealant. We re-roof around the curb so the detail actually sheds water. One Stockton job like that ran $3,500.

What does a full replacement cost?

Composition runs $9–13 a square foot installed. A recent Stockton replacement on a home of about eighteen hundred square feet came to $16,500 including new gutter and resetting the rooftop cooler. Roof area is larger than floor area because of pitch and overhangs, so we measure the roof rather than quoting from house size.

Get it flashed, not sealed.

Free inspection anywhere in Stockton, recorded so you can see it yourself, and a written flat-rate price before anything starts.