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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Montclair
Roof repair in Montclair usually runs between $350 and $1,400 depending on what’s actually wrong once shingles come off. Most jobs we handle here are done same-day, and every one starts with a written price before any work begins. If you’re off Ramona Avenue, up near the 10, or in a 1960s tract off Mission Boulevard, we know what your roof is doing under that Inland Empire sun. That’s not a guess. It’s what we see on Montclair homes every week. Call (341) 208-3988 and we’ll send a background-checked, uniformed technician to look at it.
Why Brennan Roofing Co Riverside Is Montclair’s Preferred Roof Repair Company
Montclair homeowners don’t call us because their roof looks old. They call because a leak showed up in the hallway ceiling, or the Santa Ana winds lifted a corner and now daylight’s coming through the attic. These are 1950s and 1970s tract homes, mostly. Original composition shingles, original underlayment, plywood decking stapled to rafters in a way that no longer meets code. You don’t see that from the street. We see it because we’ve opened hundreds of Montclair roofs, including a 1968 ranch off Ramona Avenue where the decking had delaminated from smog-baked heat and the chimney flashing was held with drywall screws. That’s what Roof Repair looks like out here once you actually open it up.
Every Brennan technician is background-checked and arrives in uniform. Phones are answered by a live person around the clock, no voicemail, no dispatch queue. And the price you’re quoted in writing is the price you pay. That’s the Garrison Standard, and it applies to every job in Montclair, no exceptions. Part of the Garrison Partners family since 2000, but this location is independently owned and operated. Travis Oakley runs it. He’s the one making sure the standard holds on every Montclair roof we touch.
Styles & brands we work with






Flat Roof Repair in Montclair
Flat roof repair in Montclair is a different animal from shingle work. Many additions and patio covers built in the 1960s and 70s used built-up roofing or rolled asphalt that’s now cracking under decades of UV. In Montclair, a small flat roof patch runs $400 to $900. A larger torch-down or modified bitumen repair can run $900 to $1,800 depending on square footage and how far the decking has gone. We don’t coat over rotted wood. The price goes on paper first, and if we open it and find decking replacment required, that goes into a change order you approve before we touch it.
What Gets Repaired, What Gets Replaced
We inspect the membrane for splits at seams and around penetrations. If the decking below is solid, we’ll clean, prime, and patch. If the decking is soft, we cut it out and replace it. Montclair’s heat dries flat roofs faster than sloped ones, which means the gravel ballast on older sections has often worn thin. That leads to brittle membranes and alligator cracking.
Code Upgrades That Come With the Work
Once a permit is pulled on a Montclair flat roof repair, the city requires current roof assembly standards. That often means adding insulation or upgrading drainage. We’ll tell you what’s mandatory versus what you can defer. A written allowance goes into the contract so you aren’t surprised by a line item you never discussed.
Shingle Roof Repair in Montclair
Shingle roof repair in Montclair starts around $350 for a small patch and runs up to $1,400 when we’re replacing torn or missing shingles across a larger field on a ranch home. Composition shingles on 1950s and 1960s tract houses bake in the Inland Empire sun until they turn brittle. You hear it when someone walks the roof. Roofers call it the Montclair crunch. That sound is underlayment dust and fractured granules underfoot, often spanning the whole north side of town. We match the shingle profile and color as closely as the visible wear allows, and we replace the underlayment under the repair area every time, not just where we can see damage.
Decking, Staples, and What’s Underneath
Montclair’s original plywood decking was often stapled, not nailed. Once a repair requires a permit, that stapled decking fails current shear code. Refastening is mandatory. We tell you before we start, not after we’ve opened the roof. The refasten gets priced into the initial quote when we suspect it, and into a change order if we can’t know until the shingles are off.
Flashing and Penetrations
Leaks around chimneys, vents, and skylights on Montclair homes are frequently sealed with roofing tar instead of proper metal flashing. Tar dries out and splits. The leak comes back. We replace tar-sealed penetrations with metal flashing and proper sealant, and we do it the same way on a small repair that we would on a full reroof.
Trusted Brands We Service in Montclair
We install and repair shingle lines from IKO, Atlas, and Boral on Montclair roofs. These are the manufacturers we trust for the heat and UV load this valley puts on a roof. We stock matching ridge caps, field shingles, and flashing in regional tones so we aren’t ordering from a warehouse two days out while your tarp is flapping. If your roof carries a specific manufacturer line, we verify what you have before we quote so the repair blends with the existing field.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Repair Problems We See in Montclair Homes
- Hidden decking rot from failed original underlayment. On 1970s north-side homes, the felt underlayment has often turned to dust. Once shingles come off for a small patch, the soft decking underneath extends the repair. We price decking replacement by the sheet so you know exactly what’s happening.
- Stapled plywood decking that no longer meets shear code. A permit-triggered repair activates the refasten requirement. This isn’t optional. We write it into the initial quote whenever we can and into a change order when we can’t know until the roof is open.
- Penetrations sealed with roofing tar instead of metal flashing. This is the most common source of repeat leaks on Montclair homes. We remove the tar, refit the flashing, and bed it properly so the leak does not come back in the next rainy season.
- Sun-baked shingles with granule loss and thermal cracking. Montclair’s UV exposure ages composition shingles faster than coastal locations. Repair is usually possible, but we’ll tell you honestly when the remaining shingle life doesn’t justify patching.
Pricing for Roof Repair in Montclair, CA
Here’s what we tell Montclair homeowners before scheduling anything. A basic shingle patch runs $350 to $600. A larger shingle repair including underlayment replacement runs $500 to $1,200. Flat roof patches run $400 to $900, and a full flat roof repair section runs $900 to $1,800. Decking replacement, when required, is priced per 4×8 sheet, typically $75 to $110 each, installed. Vent boot replacement runs $175 to $300. Flashing repair around a chimney or skylight runs $350 to $800. You choose what gets done, in writing, before any work starts. Call (341) 208-3988 for a free estimate.
We Also Serve Cities Near Montclair
Brennan Roofing Co Riverside handles Roof Repair in Montclair and the surrounding communities. We serve Upland, Rancho Cucamonga, Mira Loma, and Norco with the same written-price standard and the same crew accountability. If you’re one city over, the process doesn’t change.
Serving Montclair, CA - Our Local Coverage Area
We’re based in the Montclair area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Repair in Montclair
Because Montclair’s original underlayment on 1950s and 1970s tract homes has often turned to dust, and the plywood under it is soft. We include decking replacement in the quote when we can see or strongly suspect it. If we can’t know until the roof is open, we write it into a change order priced in advance. You never pay for decking work you didn’t approve. Call (341) 208-3988 to schedule a roof inspection.
Technically, you can often patch without a permit if the work is minor. But once a repair crosses into decking replacement or structural refastening, Montclair requires a permit. And if the decking was originally stapled rather than nailed, the permit triggers a code-required refasten. Skipping that leaves you exposed if you sell the home. We’ll tell you what your specific job requires before you decide.
Montclair doesn’t get heavy snow, but ice and water shield isn’t just for snow. It protects roof penetrations and low-slope transitions from water backing up during heavy rain, which Montclair does get. Code often requires it at eaves and valleys. We include it wherever the repair scope touches those areas, and we price it in the quote. Call (341) 208-3988 for an exact scope.
The crunch is the sound of walking on brittle, sun-baked composition shingles with failed underlayment underneath. It doesn’t mean the entire roof is ruined. It does mean sections will need repair sooner rather than later, and that a full reroof is likely within a few years. We’ll walk the roof and tell you what’s serviceable today versus what’s going to keep failing.
Most Montclair ranch roofs are between 18 and 24 squares total. A repair usually touches 1 to 4 squares, depending on the damage. We price repairs by the square and by the sheet of decking, so you see exactly what you’re paying for. The estimate is free, and it’s in writing before any work starts. Call (341) 208-3988.
Written by Travis Oakley, Owner at Brennan Roofing Co Riverside, serving Montclair under the Garrison Standard.