Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roof Replacement Across Ontario
A full roof replacement in Ontario typically runs $9,800 to $18,500 for a 1,800-2,400 square foot concrete tile home, and $12,500 to $21,000 for flat roofs on the city’s older commercial-residential properties. Most crews working in Ontario can finish a standard replacement in 3 to 5 working days once materials are staged, though wind-corridor tile work can stretch longer during fall Santana season. If you live in Ontario and have been putting off a failing roof, the honest starting point is a written estimate that tells you the real number before any money changes hands. Call (945) 303-9821 to schedule yours.
Ontario is a city where wind, heat, and an aging housing stock all grind against a roof at the same time. We know this because we’re out here every week, from the 1980s-2000s stucco tract streets north of the 10, down through the historic Euclid Avenue corridor with its citrus-era bungalows, over to the newer builds east of Archibald. A roof inspection in Ontario isn’t the same as one in a coastal city. What we look for first here is wind lift on the west and north slopes, and what we find underneath is baked-out underlayment that wasn’t designed for 110°F summers. That’s the Roof Replacement conversation we have with almost every Ontario homeowner.
Dispatch for Ontario is coordinated from our Inland Empire office, and crews serving Ontario are scheduled locally. When you call, a live person answers. No voicemail, no queue, no waiting until Monday.
Why Tilehurst Roofing Is Ontario’s Preferred Roof Replacement Company
Ontario homeowners aren’t asking for a generic roof company. They’ve usually been burned already. A company that quoted one number and showed up with another, or a crew that never showed at all. Tilehurst was built for exactly that frustration. We’re part of the Kingswell family of roofing companies, founded in 2000, and the way we work in Ontario is the same as every other Kingswell shop: a written price lands in your hands before any work starts, and it is never negotiated away at the door.
What Ontario customers tell us afterward tends to sound the same. They knew who was on the roof, because the technician was uniformed and background-checked. The written guarantee was handed over before the crew left, not mailed later. And if a repair fails inside the guarantee period, our 365-Day Done Right Promise means we return at no charge to correct it, for a full year after the job. That’s a specific, written promise, not a vague slogan. For a homeowner in Ontario who has already paid once for a repair that failed within a month, that written guarantee is often the deciding factor.
Greg Holloway leads our Ontario roofing teams with one rule: the roof gets opened only after the customer has signed a price. That means no door-knocking pressure, no day-of change orders, and no “I found something” conversations that end with a surprise invoice. The estimate process in Ontario starts with a careful inspection and ends with a scope of work you can actually read.
Flat Roof Replacement in Ontario
Flat Roof Replacement in Ontario almost always involves a different set of materials and problems than the tile work the city is known for. Ontario’s older commercial-residential stock, along with a good number of mid-century homes near downtown and along Holt Boulevard, carried built-up or modified bitumen flat roofs that have now outlived their service life. On newer flat applications, Ontario homeowners are increasingly moving to TPO and PVC membrane systems simply because they hold up better under sustained 105-110°F rooftop temperatures than older rolled asphalt products ever did. A typical flat roof replacement in Ontario runs from $12,500 to $21,000 depending on square footage, insulation condition, and how much decking needs to come out.
A flat roof doesn’t drain like a pitched tile roof. In Ontario’s dry climate, that sounds like an advantage until winter rains arrive. Ponding water finds every seam, every old patch, every blister in the membrane, and that’s when we get the call. The fix isn’t a patch. It’s a tear-off, new insulation where needed, and a properly welded or adhered membrane with new flashing at every parapet and penetration.
What We Check Before Quoting a Flat Roof
Decking condition is the biggest unknown on Ontario flat roofs. Years of ponding water quietly rots the plywood or OSB underneath a membrane that still looks passable from the ground. We inspect decking before we quote, and if replacement is needed, it’s written into the line-item price. No surprises.
Materials That Make Sense for Ontario Heat
White TPO and PVC membranes reflect heat instead of absorbing it, and in a city that regularly hits 110°F on the roof surface, that matters for both membrane life and the temperature inside the building. We’ll walk you through the choice based on slope, foot traffic, and how the roof drains. Then we’ll put the number in writing.
Roof Installation in Ontario
Roof Installation in Ontario on newer construction is a different job from replacement on a 1990s tract home, but the same rules apply: the underlayment is what keeps the roof dry, and the fastening is what keeps it on during Santana winds. Ontario sits squarely in the Pomona Valley wind corridor, downwind of the mountain passes that funnel Santa Ana gusts into the Inland Empire basin. Those gusts routinely exceed 60-70 mph. Any roof installed in Ontario has to be engineered for that reality, whether it’s going on a new build in the Ontario Ranch area or a custom home off Archibald. Expect new roof installation to run $10,500 to $19,000 for a typical single-family home.
We also see new construction in Ontario where an owner is adding a detached ADU, a patio cover, or a second story. Same standard applies. Every roof we install in Ontario is built to the written spec we gave you before the first nail went in.
New Construction and the Ontario Wind Standard
On new builds, we require secondary fastening on tile fields, not just mortar beds. That’s the difference between a roof that survives its first Santana season in Ontario and one that sheds its west slope before the owner has finished unpacking. We won’t install a roof in this wind corridor that we wouldn’t stand behind for a full year under the 365-Day Done Right Promise.
Permits and the Ontario Building Department
Roof replacement and installation in Ontario require a permit. We pull permits, schedule inspections, and make sure the job passes before we call it done. The permit isn’t optional, and we treat it that way from the first conversation. If the county asks for an upgrade while the deck is open, we price it in writing and get your approval before any additional work happens.
Trusted Brands We Service in Ontario
We don’t push a single house brand. Tilehurst offers genuine material choice from seven major manufacturers, and for Ontario’s tile-and-wind reality, the ones that come up most are Atlas, Tamko, and Boral. Atlas and Tamko bring strong asphalt shingle options for the older bungalows that still carry composition, while Boral is the tile name Ontario homeowners already recognize, and we also offer Gaf repair in Ontario for homeowners who prefer that brand. We keep fast-turnaround access to these manufacturers for Ontario jobs so you’re not waiting three weeks on a special order while the wind season approaches.
Common Roof Replacement Problems We See in Ontario Homes
- Wind-lifted concrete tile on west- and north-facing slopes. Ontario’s 1990s tract homes were typically set with minimal mortar and no secondary clips. After 25-plus years of thermal cycling, a single strong Santana event can strip an entire field before the homeowner wakes up.
- Brittle underlayment under tile that still looks fine from the street. Ontario summers regularly hit 105-110°F, baking the felt or synthetic underlayment far faster than in coastal markets. An uncracked tile field can be hiding a leak pathway that only shows itself after a wind lift.
- Cracked mortar-set tile beds. UV radiation and daily thermal expansion in Ontario’s climate cause the mortar pads holding tile to fail slowly. The tiles loosen long before the wind storm that everyone blames for the damage.
- Failed flashing at penetrations and transitions on older Euclid Avenue homes. Citrus-era bungalows and 1950s ranch houses in Ontario’s core have already outlived two generations of flashing. When we open those roofs, the flashing is almost always the first point of failure.
Pricing for Roof Replacement in Ontario, CA
Here are real numbers for Ontario’s market, not ballpark ranges sized to a whole region. A standard concrete tile roof replacement on a 1,800-2,200 square foot home in Ontario runs $9,800 to $16,500. Architectural asphalt shingle replacement, which we install on older bungalows and ranch homes along the Euclid corridor, runs $8,000 to $13,000 for the same footprint. Flat roof replacement runs $12,500 to $21,000. New construction roof installation lands between $10,500 and $19,000. Decking replacement, when needed, adds $2.50 to $4.50 per square foot, and it is always priced in writing before we touch it. The number that moves the most on an Ontario quote is underlayment and decking condition once we open the roof, and that’s exactly why our written price goes line by line. Call (945) 303-9821 to schedule a free estimate with exact numbers for your roof.
We Also Serve Cities Near Ontario
Tilehurst crews that work in Roof Replacement in Ontario also serve the surrounding Inland Empire communities. If you’re in Montclair, Claremont, Upland, or Rancho Cucamonga, the same written-price process, the same live-answer phone line, and the same 365-Day Done Right Promise apply. Scheduling is handled from our Inland Empire office, and we route crews to these nearby cities every week.
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 Replacement in Ontario
Yes, roof replacement in Ontario requires a city permit, and we pull it as part of the job. Once the deck is open, the inspector can require code upgrades, such as adding edge metal, upgrading underlayment to current fire standards, or improving eave ventilation. The key is that we write allowances for the most common Ontario code triggers into your initial contract, so the permit inspection doesn’t turn into an unplanned expense. If something additional is required, you’ll approve it in writing before we proceed. Call (945) 303-9821 and we’ll explain what your specific roof is likely to trigger.
Because Ontario sits directly downwind of the mountain passes that funnel Santa Ana winds into the Pomona Valley, and those gusts routinely exceed 60-70 mph. Most Ontario tract homes built in the 1980s-2000s had their tile set with minimal mortar and no secondary fastening clips, which means the tile is basically sitting there waiting for a strong gust. Once the mortar beds crack from years of 110°F heat cycles, the tiles on the west and north slopes come off in sheets. The fix is a re-set with clips, and we do that work regularly in Ontario.
You won’t know from the ground. Ontario’s summer heat bakes underlayment brittle long before the tile above it shows any visible cracking or displacement. The telltale sign is usually a leak that appears after a wind event, even though the tile looks intact. We check underlayment by lifting tile in a few test spots during the inspection, particularly on the west face where Ontario’s afternoon heat is most punishing. That inspection is part of every free estimate we do in Ontario.
A “square” is 100 square feet of roof surface, and it’s the unit roofers use to price material and labor. If your Ontario home has a 2,000 square foot roof, that’s 20 squares. Most Ontario tile replacement quotes land between $490 and $800 per square depending on tile profile, underlayment spec, and how much fastening correction is needed. When we write your quote, we show the square count on the line items so you can verify the math yourself.
Yes, in most cases we can match the existing tile profile and color closely enough that the repaired slope doesn’t read as a patch from the curb. Many Ontario tract homes used a narrow set of common tile profiles, and we source from Boral and other manufacturers that still produce those patterns. If the tile has been discontinued, we’ll show you the closest available match before you approve anything. If the underlayment under the intact slopes has also failed, a full Roof Replacement may make more sense than one slope at a time, and we’ll tell you that honestly.
If you’re in Ontario and you need a roof that can handle the wind and the heat, start with a written estimate. Call (945) 303-9821. A live person answers, and the price is in your hands before any work begins.
Written by Greg Holloway, Owner at Tilehurst Roofing, serving Ontario and the Inland Empire since 2000.