Architectural shingles
Metal roofing
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GAF
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Roof Repair in Ontario, CA: What It Costs and What Actually Fails Here
Roof repair in Ontario runs $350 – $800 for most shingle and tile fixes, $450 – $1,100 for underlayment work at valleys and eaves, and $900 – $2,500 for larger sections where decking has rotted through. Those are real numbers for this market, not national averages. The bigger question in Ontario isn’t the price, it’s whether the repair will hold past the next Santa Ana season. Most of the callbacks we see in 91762 and 91761 trace back to one thing: a cheap inland-spec job that ignored what wind-driven grit and 100°F thermal cycling actually do to fasteners and underlayment here.
Bedrock Roof Repair serves Ontario homeowners from inspection through repair, and we’re straight about what your roof needs. Sometimes that’s a targeted fix. Sometimes it’s a re-set with new underlayment. Call (833) 589-7850 and we’ll tell you which one before you spend a dollar.
Key Takeaways:
- Most Ontario roof failures are corrosion and underlayment problems, not shingle problems.
- A cheap “tile re-set” that skips new underlayment will fail again after the next wind event.
- We work with all seven major roofing brands, so recommendations follow the job, not a supplier.
- Free estimates, written line-item quotes, and no change orders once work starts.
Why Bedrock Roof Repair Is Ontario’s Preferred Roof Repair Company
Alan Cofield leads our team, and the way we work in Ontario is simple: we inspect first, repair when it makes sense, and replace only when the roof actually needs it. That sequence is in our name. We get called to Ontario homes where another contractor quoted a full tear-off, and after thirty minutes on the roof we find one failed valley and some rusted battens. A $1,400 repair instead of a $14,000 replacement. That’s not a sales pitch. That’s what happens when the company evaluating your roof isn’t incentivized to sell you a new one.
We work the whole city: the 1950s stucco tracts off Euclid Avenue and Holt Blvd in 91762, the newer two-story subdivisions south of the 60, and the flat-roof commercial buildings along the 10/60 logistics belt in 91764. Different housing stock, different roof systems, same repair-first discipline. Ontario homeowners don’t have time to start over with a new contractor when a repair estimate goes sideways. We handle inspection, repair, and replacement under one roof, so you get one team from the first look to the final nail. No handoffs, no surprises.
Roof Repair is our core trade, and we treat every Ontario job like it’s going to be inspected twice: once by us, once by the next storm.
Written by Alan Cofield, Owner at Bedrock Roof Repair, serving Ontario since day one.
Styles & brands we work with
Storm Damage Roof Repair in Ontario
Storm damage roof repair in Ontario is mostly a Santa Ana problem. We get a wave of calls after every significant wind event, and the calls follow a pattern: slipped concrete tiles on older hip roofs in 91762, torn shingles on comp-roofed ranches, and lifted flashing at valleys where the wind got underneath. The fix always starts with an inspection of what moved and why. In Ontario, what moved is often not the tile itself but the rotted batten underneath it, where the original electro-galvanized nail has rusted to a pencil point over a decade of wind-driven grit.
Tile Re-Set and Underlayment Work
After a wind event in Ontario’s older tracts, we typically find that the underlayment at the valley and eave edges has dried out and torn. A tile re-set that doesn’t address the underlayment is a callback waiting for the next Santa Ana. We strip the affected plane, install new self-adhered membrane at the valleys, and re-set the tile with hot-dip galvanized ring-shank nails. Matching out-of-production tile is a real problem in 91762; we scavenge from underlayment-covered spares the original builder left, or match from salvage yards along Holt Blvd.
Flashing and Vent Boot Failures
Wind-driven rain finds every small gap at pipe boots, ridge vents, and sidewall flashing. In Ontario’s inland heat, rubber boots crack and split within five to seven years, and the monsoon storms that roll through in late summer expose them fast. We replace vent boots with newer silicone or EPDM units rated for high heat, and re-secure lifted flashing with proper stainless hardware. A flashing repair in Ontario typically runs $250 – $500 for a single penetration, depending on access and what we find underneath.
Metal Roof Repair in Ontario
Metal roof repair in Ontario is less about the panels and more about the fasteners holding them. We see standing-seam and corrugated metal roofs on some 1980s-era homes east of Grove Avenue and on dozens of commercial buildings along the 10/60 corridor, and the failure mode is consistent: the original screws have lost their neoprene washers to heat and grit, or the screw shanks themselves have corroded where the coating was scratched during installation. The panels are fine. The attachment system isn’t.
Fastener Replacement and Re-Sealing
We replace failed screws with coated stainless or heavy hot-dip galvanized fasteners sized for the panel profile, and re-seal the penetration with a high-temp rated neoprene washer. On Ontario’s south-facing slopes, where the sun bakes panels to well over 150°F in July and August, we use fasteners with a higher temp rating than what the original builder specified. This is not a detail. It’s the difference between a roof that holds and a roof that starts leaking through a hundred tiny rust lines within eight years.
Seam and Penetration Work
Standing-seam metal roofs get leaks at the seams when wind-driven rain backs up under the seam geometry. In Ontario, the Santa Ana winds push water sideways in ways a roof designed for vertical rain never anticipated. We re-seal seams with butyl-backed tape products rated for inland heat, and replace rotted pipe boots with higher-profile units. If we find the decking is rotted below the metal, we’ll tell you before we touch a panel, because that changes the scope and the price honestly.
Trusted Brands We Service in Ontario
We stock parts and source materials for all seven major roofing brands: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That matters more than it sounds like. When an Ontario homeowner has a 1960s-era concrete clay tile that’s out of production, or a CertainTeed shingle style that was discontinued two product cycles ago, we can still find the match because we aren’t tied to one manufacturer’s catalog. For Ontario’s newer comp-shingle roofs, we frequently install Owens Corning and IKO products on repairs where color and profile matching matters. The brand-agnostic approach means your repair spec is driven by your roof and your budget, not by which supplier we’re pushed to favor.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Repair Problems We See in Ontario Homes
- Corroded tile battens and fasteners: Original builders in 1950s – 60s Ontario tracts used plain steel or electro-galvanized nails. After a decade of Santa Ana grit and inland heat, those nails rust to nothing and the tiles slide off in the next big blow. It looks like storm damage. It’s actually deferred corrosion.
- Failed underlayment at valley edges: The original underlayment on old hip roofs dries out and tears at the valleys before the tile above ever fails. We see this most in 91762, where the homes are sixty-plus years old and the original felt has been baking under concrete tile since Eisenhower was in office.
- Thermal cracking at south-facing stucco and window seals: Ontario’s 100°F+ summer days cycle window frame seals and paver joints hard. When monsoon rain follows, water wicks behind the weep screed and rots the sheathing below the roofline. This is a repair that starts at the wall and ends in the roof deck.
- Flat-roof membrane punctures and seam splits on the 10/60 belt: The warehouse roofs along the logistics corridor take a beating from forklift traffic, HVAC servicing, and 100-degree heat that breaks down TPO and EPDM seaming. Commercial flat roof repair in 91764 is a discipline of its own, and one most residential roofers in neighboring Chino never touch.
Pricing for Roof Repair in Ontario, CA
Here’s what we charge, honestly. A straightforward shingle repair (a dozen shingles, one penetration) runs $350 – $550. Tile re-set work with new underlayment at a single valley is $700 – $1,100. A full eave or plane rebuild with rotted decking replacement runs $1,500 – $2,800. Vent boot replacement is $150 – $300 per boot. Flashing work runs $250 – $500 per penetration. Flat roof patches on TPO or EPDM run $600 – $1,500 per section. If you’re getting a quote far below these numbers in Ontario, ask what fasteners and underlayment the bid specifies. That’s where the cheap contractor cuts, and it’s exactly what fails first. We give written line-item quotes and fixed pricing. The number on the estimate is the number on the invoice. Call (833) 589-7850 for a free estimate.
One more thing worth saying plainly: the inland-spec cheap bid costs more within a decade. A tile re-set with plain steel nails and no new underlayment might save you $500 today and cost you $2,500 in five years when the next Santa Ana event rips the same tiles off again. We price the coastal-spec version because in Ontario, with this wind and this heat, that’s what “done right” actually means.
We Also Serve Cities Near Ontario
Bedrock Roof Repair serves homes across the Ontario area, including Roof Repair in Ontario and the surrounding communities. If you’re in Montclair, Upland, Chino, or San Antonio Heights, we’re a short drive away and already familiar with the roof systems and failure modes in your neighborhood. The same repair-first discipline applies everywhere we work.
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
Your neighbor’s tiles almost certainly weren’t torn off, they were released when the batten beneath them failed. The difference between your roof and theirs is usually the condition of the underlayment and the corrosion state of the fasteners holding the battens to the decking. Homes in 91762 built in the 1950s and 60s often have original electro-galvanized nails that rust to nothing after decades of heat and grit. When the nail goes, the batten lifts, and the tile on top slides. If your roof hasn’t lost tiles, it may simply be that your fasteners haven’t reached failure yet, not that your roof is structurally superior. Call (833) 589-7850 and we’ll inspect yours before the next wind event tells you the answer for free.
For most Ontario roofs, the coastal-spec version (hot-dip galvanized or stainless fasteners, self-adhered membrane at valleys, high-temp rated boots and washers) adds roughly 10 to 15 percent to the repair cost, and it’s worth every dollar. The Ontario environment isn’t coastal, but it’s uniquely punishing in a different way: 100°F+ thermal cycling, wind-driven grit, and airborne agricultural dust near the Chino border degrade standard hardware faster here than salt air does on the coast. The cheap spec buys a decade. The good spec buys thirty years. For a house you plan to own for a while, the math isn’t close.
Yes, with modifications. The airborne chloride and grit from the logistics corridor and, further west, the dairy and agricultural dust near the Chino border, absolutely degrade cheap fasteners and unsealed membrane edges on flat roofs. The commercial version of coastal-spec means stainless fasteners at the perimeter and curbs, properly welded or heat-welded TPO seams (not taped), and metal edge details that are secured with compatible hardware. We repair flat TPO and EPDM throughout 91764 and 91761, and the discipline is the same: buy the hardware that survives this environment, not the hardware that survives one warranty year.
You can often repair just the bad valleys and eaves, but it depends on the underlayment condition across the whole roof. In a 1980s Ontario stucco home, the underlayment at the valleys and edges is usually far more degraded than the field, because that’s where water concentrates and heat cycles hardest. We’ll inspect the whole roof and tell you honestly whether a valley-and-eave repair will hold, or whether the underlayment has gone too far and a full replacement is the only sane option. When we open up a valley and find the decking is still solid and the field underlayment is intact, a targeted repair is perfectly legitimate. We repair when possible. We replace when necessary. We inspect before either.
Compare the fastener and underlayment specifications, not just the bottom line. Ask the cheaper bidder directly: what nail or screw will you use on the battens? What underlayment goes under the re-set tile? What boot material and temp rating? If the answer is vague or the spec is “standard,” that’s your answer. The cheaper bid is almost always cheap because it skips the hot-dip or stainless hardware and the self-adhered membrane at the valleys, and those are exactly the materials that determine whether your repair survives the next five Santa Ana seasons. Get both bids in writing, line by line. Then call us at (833) 589-7850 and ask the same questions. We’ll answer them in writing, free.
Bedrock Roof Repair serves Ontario, CA with roof inspection, repair, and replacement. Call (833) 589-7850 to schedule your free estimate.
Written by Alan Cofield, Owner at Bedrock Roof Repair, serving Ontario since day one.