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CertainTeed Roofing in Ontario, CA | Oakmont Roof Repair
We provide independent CertainTeed roofing service across Ontario, CA, covering everything from Landmark shingle repair to full re-roofs with WinterGuard underlayment. The one thing that makes our CertainTeed work here different is that we know Ontario’s two distinct roof profiles: heat-aged skip-sheathing ranches downtown and modern OSB subdivisions east. If your CertainTeed roof is cracking, curling, or leaking, call (866) 942-0875 for a straight assessment. Noel Fierro and the Oakmont Roof Repair team have spent years on rooftops across San Bernardino County, and we’ll tell you honestly whether repair makes sense or replacement is time.
Why Ontario Residents Choose Us for CertainTeed Service
We work on CertainTeed roofs every week, which means we know how Landmark shingles behave after a decade of Ontario heat. We’re not a general contractor who sometimes touches roofs. Roofing is all we do, and Roof Repair – Ontario is our specialty. CertainTeed is one of seven major brands we carry, alongside GAF, Owens Corning, IKO, Atlas, Tamko, and Boral. That matters because it means we never push you toward a CertainTeed replacement just because it’s the only line we stock. We match the material to your roof and your budget.
Our founder, Noel Fierro, learned construction trades at Victor Valley College and spent years on rooftops across San Bernardino County before starting Oakmont. He grew up in the High Desert, and the roof is the one thing his father, a general contractor, always told him you can never ignore. “The roof doesn’t lie, and neither do I.”
For full-line CertainTeed sales & service, we carry OEM-compatible accessories like SwiftStart starter and Ridge Vent, and we stock the common replacement parts Ontario homes need so we can move fast once you call.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Ontario
Each of these failure modes shows up differently depending on whether you’re in a 1960s ranch near downtown or a newer subdivision east of the 15. Here’s what we see most often:
- Thermal cracking and edge curl on Landmark shingles. Ontario summers routinely push past 100°F, and that heat bakes the asphalt until the shingle’s fiberglass mat dries out and the corners start to lift. We see this constantly on 15-to-20-year-old CertainTeed roofs, especially on south-facing slopes in the older 91761 and 91762 blocks.
- Granule loss and tab lift from Santa Ana winds. When the factory sealant on CertainTeed shingles ages, a strong fall Santa Ana will slide right under the tabs and flip them up. We’re on rooftops after every big wind event in the Inland Empire, re-sealing and re-nailing lifted tabs before the winter rains arrive.
- Seal failures around vent boots and flashing on low-pitch gable ranches. Most mid-century Ontario homes have low-slope roofs, which means water hangs around penetrations longer. Dried-out flashing and cracked vent boots on those roofs let water into the underlayment, and by the time it shows up on the ceiling, the decking is already soft.
- Brittle, heat-exhausted shingles that crack when walked on. This is a particularly Ontario problem: after 40+ years of Inland Empire summers, certain CertainTeed shingles become so brittle they crack under foot traffic. On older downtown homes with skip sheathing underneath, that hidden layer makes the whole system even less forgiving.
- Leaks around chimneys and skylights in Spanish-style stucco homes. Ontario’s older Spanish-style houses often have custom flashing around chimneys and skylights that wasn’t installed with modern CertainTeed accessory standards. Those are the leaks that get patched twice before someone calls us.
CertainTeed Service in Ontario: What Local Conditions Mean for Your Roof
If you own a home in the older Ontario neighborhoods near downtown, in the 91761 or 91762 ZIP codes, you may have something under your CertainTeed in Upland shingles that changes the whole job: skip sheathing. Back in the post-war building boom, roofers laid wood shingles over spaced boards, not solid plywood or OSB. When a later homeowner re-roofed with CertainTeed Landmark shingles, those shingles often went right over that old, uneven surface. We see it all the time now. A roof that looks like a straightforward shingle replacement from the street actually needs the old layers torn off, solid OSB sheathing installed over the spaced boards, and then the new CertainTeed system built up from there. That’s a step you rarely see in the newer east-side developments in 91764, where homes were framed with modern OSB from day one. It adds cost and time, but skipping it means the new CertainTeed roof will never lay flat, never seal properly, and you’ll still be chasing leaks two seasons later. We’ve torn off plenty of Landmark shingles on Euclid Avenue-era ranches and found exactly that. It’s not a surprise to us anymore; it’s just Ontario.
CertainTeed Models & Products We Service in Ontario
We install and repair the full CertainTeed residential line, and we’re specific about what goes on your roof. Landmark architectural shingles are the workhorse here, including Landmark Pro and Landmark Solaris for homeowners who want a heavier shingle with better UV resistance. On upgraded Spanish-style re-roofs, we install Presidential Shake and Presidential Solaris for that dimensional, hand-split look. Older XTGard, XT25, and Hatteras lines still cover plenty of Ontario homes, and we offer CertainTeed repair in Chino for those too. For new installations and re-roofs, we use OEM CertainTeed accessories: SwiftStart starter strips, WinterGuard waterproofing underlayment, and Ridge Vent. When a flashing or vent boot fails, we reach for quality aftermarket parts when they outperform the factory piece. We stock the common CertainTeed components Ontario homes need, so turnaround doesn’t drag.
See the difference
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AfterCertainTeed Service Pricing in Ontario
CertainTeed roof work in Ontario varies by what’s actually wrong, not by what we’d like to sell you. Isolated shingle replacement, re-sealing wind-lifted tabs, or replacing a vent boot runs in the $350 to $850 range depending on access and how much material the repair calls for. Full roof replacement is different math entirely. On a typical Ontario ranch, you’re looking at $9,000 to $18,000 depending on square footage, whether you need solid sheathing installed over old skip sheathing, and which CertainTeed line you choose. Landmark sits in the value range; Presidential Shake pushes higher. We give free estimates with line-item quotes, and we don’t change the price mid-job. Permits and inspections are handled, and we stand behind the work. Call (866) 942-0875 for an exact number; the estimate doesn’t cost you anything.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario area and know this community well, including CertainTeed in San Antonio Heights. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Ontario
Ontario’s summer heat is brutal on asphalt shingles. Days over 100°F, week after week, dry out the asphalt’s oils until the shingle loses flexibility and the corners curl, then crack. South-facing slopes age fastest. It’s not an install defect; it’s the Inland Empire sun. We can repair isolated curled tabs, but once cracking is widespread across the field, replacement becomes the honest call. Call (866) 942-0875 and we’ll tell you which side of that line your roof is on.
No, and you shouldn’t want to. Skip sheathing in the older 91761 and 91762 neighborhoods means wood shingles over spaced boards, and CertainTeed architectural shingles need a solid, flat surface to seal and perform. We install solid OSB over the spaced boards before laying new Landmark or Presidential shingles. It adds cost, but skipping it leads to uneven shingles, failed seals, and leaks inside two seasons.
Properly installed CertainTeed shingles get nailed in the correct position and sealed with factory adhesive, but extreme Santa Ana gusts can still test any roof. The difference with a new install is that the shingles haven’t had years of heat breaking down their sealant. We use SwiftStart starter strips and follow CertainTeed’s nailing and sealing specs precisely, so the roof has its full designed wind resistance. Older roofs with aged seals are the ones that lose tabs.
Absolutely, if the shingles still have life in them. We re-seal and re-nail lifted tabs all the time after Ontario’s fall wind events. The key is checking the shingle for brittleness: if it cracks when lifted, repair stops making sense. We’ll give you an honest read on which situation you have. Call (866) 942-0875 for an assessment; you won’t get a replacement pitch if your roof only needs a repair.
Ontario’s intense heat dries out flashing, vent boots, and underlayment over time. Then when winter rains arrive, water finds every dried-out seam and cracked boot and follows it into the house. Low-pitch gable ranches are especially vulnerable because water sits around penetrations. In the older downtown blocks, the problem is compounded by decades-old skip sheathing underneath. The leaks often show up on ceilings far from the actual roof penetration, which is why you need an honest inspection rather than a patch job.
Service Areas Near Ontario
Beyond Ontario itself, we serve the surrounding Inland Empire communities where CertainTeed roofs face the same heat and wind. You’ll find us working in the full Ontario service area, plus Rancho Cucamonga, Upland, Chino, and Montclair. We’re also on rooftops in Claremont and Montclair for CertainTeed-specific repairs and replacements. If you’re anywhere in the western Inland Empire, give us a call. We’ll come take a look.
Book Your CertainTeed Service in Ontario Today
A cracked CertainTeed shingle in Ontario doesn’t fix itself; it gets worse with every hot day and every Santa Ana. Call (866) 942-0875 and we’ll schedule a free inspection, tell you what’s actually happening on your roof, and quote the repair or replacement honestly. “The roof doesn’t lie, and neither do I.”
Written by Noel Fierro, Owner at Oakmont Roof Repair, serving Ontario and the surrounding Inland Empire with independent CertainTeed roofing service.