Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Ontario
Roof repair in Ontario, CA typically runs between $350 and $1,400 depending on what’s failed, with flat roof patches on warehouse membranes often landing between $850 and $2,200. Most residential repairs here are finished the same day once we’re on site. If you’re looking at water stains on a ceiling or missing shingles after a Santa Ana wind event, call (833) 467-4901 and we’ll send someone from our Roof Repair team to assess it.
We work throughout Ontario regularly, from the older ranch homes near Euclid Avenue to the industrial corridors along Airport Drive. That matters because roof failures here follow patterns a roofer from the coast won’t recognize. Intense UV, dry heat, and wind events hit Ontario roofs in specific, predictable ways, and the fix isn’t always obvious from the surface.
Why Huntington Beach Roofers Is Ontario’s Preferred Roof Repair Company
Seven brands. One contractor. We install and repair GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral products, which means the material we recommend follows your roof’s needs and your budget, not whatever happens to be in our warehouse. For GAF repair in Ontario, we match the fix to the specific product line already on your roof. That matters in Ontario, where a 1950s ranch home with three layers of old shingles needs a different approach than a TPO membrane on a 91761 distribution center.
Neil Stratton runs our repair division, and he’s the person Ontario homeowners often speak with when a leak or wind event has them scrambling. We inspect first, recommend second. If a repair makes sense, we say so. If a full tear-off is the only honest path, you’ll hear that too, with the reasoning laid out so you can verify it yourself.
Our crews know Ontario’s permit process and the code triggers that come with it. When an older home needs a repair that exposes decking, the city may require upgrades. We handle that conversation upfront, not after the shingles are off.
Styles & brands we work with
Emergency Roof Repair in Ontario
Emergency Roof Repair in Ontario is for the moments that can’t wait: a Santa Ana wind event rips ridge caps off a 1950s ranch at 2 a.m., or a branch punctures a flat membrane during a rare heavy downpour. The first job is stopping water intrusion, which usually means tarping the damaged area, then setting up a proper repair once conditions allow. A tarp and temporary seal in Ontario typically runs $350 to $500, while the permanent repair that follows depends on what’s actually damaged.
Calling the same contractor for the temporary fix and the permanent repair saves time and money. We see the damage fresh, document it for insurance, and don’t have to reverse-engineer someone else’s emergency patch. For Roof Repair in Ontario emergencies, we prioritize the older ZIPs around 91762 and 91764, where aging shingle tabs and ridge caps fail under wind load the most.
Santa Ana Wind Damage Response
When gusts hit 50 mph or hotter, the first failures are almost always ridge caps and shingle tabs on homes built before 1970. If the underlying decking is still sound, we re-nail and seal with fresh material. If it’s soft from years of dry rot or trapped moisture, re-nailing won’t hold, and we’ll tell you before charging for a fix that will fail again.
Leak Containment and Tarping
A tarp isn’t a repair, but it keeps a bad situation from getting worse while we order materials or work through your insurance claim. We secure tarps with battens and overlap seams against wind, which matters in Ontario because a poorly tied tarp becomes a sail during the next wind event and tears roofing off around it.
Flat Roof Repair in Ontario
Flat Roof Repair in Ontario covers the commercial and industrial membranes concentrated along the 91761 corridor, from the warehouse rows off Milliken Avenue to the distribution facilities near Ontario International Airport. These roofs take constant sun and thermal cycling through the Inland Empire’s extreme temperature swings. Seams open, flashing at penetrations pulls away, and the membrane itself degrades long before a typical 20-year warranty would suggest.
Most flat roof repairs in Ontario run between $850 and $2,200. A small seam repair with new cover strip is on the lower end. A larger patch involving new insulation board and membrane replacement runs higher. The key is catching seam failures early, because water travels sideways under the membrane and shows up nowhere near the actual breach.
TPO and Modified Bitumen Patchwork
We carry TPO membrane in common thicknesses and modified bitumen in both torch-down and peel-and-stick. That means a repair doesn’t wait on a special order when a seam has opened on a warehouse roof that needs to stay dry tonight.
Penetration and Flashing Sealing
HVAC curbs, exhaust vents, and conduit penetrations are the weak points on Ontario flat roofs. The sun bakes the sealant until it cracks, and thermal cycling pulls the flashing away from the curb. Re-sealing with the right product for the existing membrane is a small repair that prevents a much bigger one.
Trusted Brands We Service in Ontario
We’re authorized to install and repair products from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, which means one phone call covers the full spectrum from economy shingles to manufacturer-certified premium systems. If a repair requires matching an existing shingle, we can pull from multiple product lines rather than telling a homeowner their only option is a full re-roof because we can’t source the original material. For Ontario’s 1950s and 1960s homes, that’s often the difference between a $600 repair and a $14,000 replacement. Repair or replace, we’ll tell you which one actually makes sense.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Repair Problems We See in Ontario Homes
- UV-cracked shingles and failed seals on older composition roofs. Ontario’s dry heat bakes shingles until they’re brittle, and a repair that only replaces the visible broken tab often fails again within a season because the seal strips on adjacent shingles are already shot.
- Wind-lifted ridge caps on 1950s and 1960s ranch homes. Santa Ana gusts get under ridge caps and peel them back. If the decking below has softened from years of trapped moisture, a simple re-nail won’t hold, and we’ll tell you before charging for it.
- Flat roof membrane seam opening along the 91761 warehouse belt. Thermal cycling from hot days to cool nights causes membrane seams to open and flashings to pull away at penetrations. Leaks don’t show until Ontario’s rare but intense rain arrives.
- Multiple layers of nailed-over composition shingles hiding decking rot. In the older neighborhoods around downtown Ontario, roofs often carry three or four layers of old shingles. By the time we strip back the damaged area, the decking underneath may be dry-rotted, which changes the repair scope and may trigger a permit and tear-off.
Pricing for Roof Repair in Ontario, CA
On the residential side, expect to pay $450 to $850 for a typical shingle repair that includes replacing damaged tabs, sealing, and re-nailing. Flashing repairs around chimneys and skylights run $500 to $900. Valley repairs are typically $700 to $1,100, depending on how much underlayment has to be opened up. Flat roof patches on Ontario’s commercial buildings usually land between $850 and $2,200.
What moves the price is hidden decking damage. On older Ontario homes with multiple layers of old shingles, what starts as a $500 repair can become a $2,500 or $4,000 job once the decking is exposed and replaced. We write allowances into the contract so that reality doesn’t blindside you. Call (833) 467-4901 for a free estimate with line-item pricing before work begins.
We Also Serve Cities Near Ontario
Our Ontario service area extends into the surrounding Inland Empire communities. We handle roof repairs in Montclair, Upland, Chino, and San Antonio Heights with the same inspection-first approach and seven-brand material access. Same crews, same pricing structure, same commitment to telling you when a repair doesn’t make sense.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario 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 Ontario
Yes, in many cases you can repair only the damaged area, but not always. If we expose three or four layers of old composition shingles, the existing roof often can’t hold new nails or flashing properly. We’ll open the damaged section, inspect the decking, and tell you honestly whether a targeted repair will last or whether a full tear-off is required by code. Call (833) 467-4901 and we’ll look at your roof before you commit to anything.
We write a decking allowance into the repair contract upfront. That means we quote the visible damage, then add a per-sheet price for replacement decking if the existing wood turns out to be dry-rotted or water-damaged. We never proceed with unapproved work. You’ll see the damage yourself before we replace it. That’s the difference between working with a contractor who inspects first and one who discovers problems at your expense.
For most 91761 warehouses, heat-welded TPO patches or modified-bitumen cover strips outperform adhesives and coatings. The thermal cycling these roofs endure means a patch that flexes with the membrane will last, while a rigid or brittle fix will open again within two seasons. We match the repair to the existing membrane type, not just whatever’s on the truck.
We respond to Ontario emergency calls the same day when wind or rain is actively threatening the home, and we carry tarps and temporary sealants on our trucks. The real priority is stopping water intrusion before the next rain event, then doing the permanent repair right once conditions allow. Call (833) 467-4901 and tell us what you’re seeing. We’ll get someone out to Ontario from our Huntington Beach base as fast as the roads allow.
Yes, we pull permits when the City of Ontario requires them, which typically happens when a repair exposes decking or becomes a re-roof. The common triggers on older homes are the requirement for a tear-off once multiple layers are discovered, and replacement of damaged decking to current nailing standards. We handle the paperwork and the inspection process so you don’t have to navigate the building department alone. For an exact quote on your Ontario roof, call (833) 467-4901, estimates are free.
Contact Huntington Beach Roofers today at (833) 467-4901 for a free, written estimate. We serve all Ontario ZIP codes including 91762, 91764, 91761, and 91758.
Written by Neil Stratton, Owner at Huntington Beach Roofers, serving Ontario and the surrounding Inland Empire.