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 usually falls into two buckets: the small leak you caught early, or the bigger problem that’s been quietly spreading under the tile. Most jobs we handle in the 91761 and 91764 ZIP codes run between $350 and $1,800 depending on the failure. Call (866) 361-0798 and we’ll tell you what we’re looking at, free of charge.
We’re based in San Bernardino and work across Ontario every week. That matters because the tract homes here share construction DNA. A 1985 tile roof on the east side fails differently than a 1965 shingle roof near downtown, and knowing which one you have changes the fix. We inspect before we recommend. From the ridge cap down.
Why Ridge Cap Roof Repair Is Ontario’s Preferred Roof Repair Company
Ontario homeowners call us because our Roof Repair team sees the same failure patterns block after block. In the 1980s subdivisions that wrap the 91761 and 91764 ZIP codes, original concrete tile often outlives the felt beneath it. We know to check the underlayment before assuming the tile is the problem. That saves you money and stops leaks at the source.
Noel Cardenas built Ridge Cap Roof Repair around a simple rule: inspect first, recommend second. We carry materials from seven manufacturers, including CertainTeed, Owens Corning, and IKO, so the fix is matched to your specific roof, not to whatever we happen to stock. Same crew performs the inspection and the repair, so nothing gets lost between a salesperson and a field tech.
Seven manufacturers. One crew. That’s the whole model from the ridge cap down.
Styles & brands we work with
Commercial Roof Repair in Ontario
Commercial Roof Repair in Ontario means working with the flat and low-slope systems that cover the warehouses and retail centers along Milliken Avenue and the industrial blocks south of the 10. Most are TPO, modified bitumen, or older built-up roofs. A standard patch or seam repair runs $450 to $1,500. Larger membrane restorations on bigger buildings can reach $4,000 to $9,000 depending on square footage.
Membrane Patching and Seam Repair
We find tears at curbs, penetrations, and exhaust vents. Ontario’s summer heat expands membrane seams, and Santa Ana winds test every weak weld point. We heat-weld TPO seams rather than relying on tape or caulk that fails in a season.
Roof Inspection for Commercial Properties
Before a lease sale or annual maintenance cycle, we document membrane condition, ponding areas, and flashing integrity. The report gives you a repair scope and a realistic timeline. We don’t recommend replacement if the membrane has service life left. Repair when it makes sense. Replace when it doesn’t.
Roof Leak Repair in Ontario
Roof Leak Repair in Ontario usually starts with a stain on the ceiling that traces back to a failed underlayment, a cracked boot, or wind-driven rain through a loose ridge cap. Most residential leak repairs range from $350 for a simple vent boot swap to $2,400 for underlayment replacement under a section of concrete tile. The leak itself is rarely where the water enters.
Tile Lift-and-Relay for Underlayment Failure
In east Ontario tract homes, we remove original concrete tile, cut out the cracked felt, lay a synthetic underlayment, and relay the same tile. That’s a lift-and-relay. It costs roughly $1,200 to $2,800 for a typical repair zone and buys 20 more years without a reroof.
Chimney and Valley Flashing Repairs
Flashing failures are common around chimneys and in valleys where two roof planes meet. Santa Ana winds work the metal loose over time. We replace corroded flashing and seal penetrations with manufacturer-spec materials from our seven-brand roster.
Trusted Brands We Service in Ontario
We work with CertainTeed, Owens Corning, IKO, and Atlas, among others. That gives us access to the right tile, shingle, and underlayment product for Ontario’s climate instead of whatever one manufacturer pushes. If your HOA or builder warranty specifies a product line, we can usually match it. We stock common parts for Ontario’s dominant roof types, which means shorter turnaround on repairs in Montclair, Upland, and Chino when you’re ready to schedule.
Common Roof Repair Problems We See in Ontario Homes
- Felt underlayment baked dry under concrete tile. Thirty-plus years of 100°F summers cracks the felt the tile sits on, so water reaches the deck even when the tile looks perfect from the street.
- Loose ridge caps from Santa Ana winds. The wind corridor through the Cajon Pass hits the east side hardest. Ridge caps and tile fasteners loosen, letting wind-driven rain slip under the edges.
- Failed low-slope patio additions. Many 1960s-1980s Ontario homes have hot-mop or early TPO patio roofs that degrade fast in the heat. We patch or replace these before they rot the framing.
- Cracked vent boots and pipe collars. Small, cheap failures that let water pool around HVAC stacks and plumbing vents. We catch these during routine inspections before they become ceiling stains.
See the difference
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AfterPricing for Roof Repair in Ontario, CA
Here’s what you can expect in Ontario’s market right now. A simple vent boot replacement runs $350 to $600. Flashing repair around a chimney or valley is $500 to $1,200. A tile lift-and-relay for underlayment replacement runs $1,200 to $2,800 per section. Full commercial membrane patches start at $450 and scale with square footage. The main variables are roof pitch, accessibility, and whether the decking underneath has rotted. We give written line-item quotes before any work starts, so you see the breakdown and the price holds. Call (866) 361-0798 to schedule a free estimate.
We Also Serve Cities Near Ontario
Beyond Ontario, our crews handle Roof Repair in Ontario, Montclair, Upland, Chino, and San Antonio Heights on a daily schedule. If you’re just outside the city line, we still show up, inspect, and quote the same way we do for central Ontario homes.
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
The tile is usually fine. What fails in these 1980s tract homes is the felt underlayment beneath it, which dries and cracks after decades of Ontario heat. Water reaches the deck and follows the framing to your ceiling. The tile still sheds rain, but the waterproof layer is gone. Call (866) 361-0798 and we’ll lift a few tiles to confirm before quoting anything.
You call a roofer who will document the repair, use manufacturer-approved materials, and follow the original install method. We match the existing product line from our seven-brand roster and photograph every step, so your warranty claim stays intact. Get that written quote first. Estimates are free.
Repair fixes a specific failure, like cracked underlayment or loose flashing, and costs between $350 and $2,800. Reroof replaces the entire system, typically $18,000 to $30,000 for a concrete tile tract home in Ontario. If your tile is sound and the decking is dry, repair wins. We won’t sell you a reroof your roof doesn’t need.
Many Ontario HOAs do, especially in master-planned communities where exterior appearance rules apply. Approval typically covers the material color, profile, and sometimes the contractor’s license and insurance. We provide spec sheets and documentation for your architectural review. Call (866) 361-0798 and we’ll tell you what your HOA will likely ask for.
Three upgrades consistently earn their cost here: synthetic underlayment under existing tile (about $1.20 to $1.80 per square foot installed), upgraded flashing at chimneys and valleys ($500 to $1,200), and Class A fire-rated assemblies if you’re near the wildland-adjacent areas east of the 15. Skip full reroofs if the tile still has life. The right material for your roof matters more than the most expensive one.
What Ontario Homeowners Should Know
We see the same failure pattern block after block in Ontario’s 1980s east-side subdivisions. The original 30-year concrete tile is fine. The felt underlayment beneath it has dried and cracked from decades of 100°F summers. A leak in one house on the street usually means the neighbors are on borrowed time too. Last year we worked on a 1987 tract home in the 91761 ZIP where the living room ceiling had stained from a leak that started at the chimney flashing. We lifted the original concrete tile, removed the heat-cracked felt, and laid a synthetic underlayment. The tile went back down, the flashing was replaced, and the leak stopped without a reroof. That’s a lift-and-relay, and it’s the most common repair we do for homes built between 1975 and 1995 in Ontario. If your neighbors are having leaks and your roof is the same age, call us before the stain appears.
Call (866) 361-0798 to schedule a free roof inspection and repair estimate in Ontario. We inspect before we recommend, and the right fix is always cheaper than the wrong reroof.
Written by Noel Cardenas, Owner at Ridge Cap Roof Repair, serving Ontario and the Inland Empire.