Roof Replacement in Ontario — Free Inspection, Itemized Written Quote

Fast, Reliable Roof Replacement Across Ontario

A full roof replacement in Ontario typically runs between $9,800 and $18,500 for a standard single-story ranch with asphalt shingles, depending on whether the old decking can stay or needs solid sheathing added. We work across Ontario’s 91758, 91761, 91762, and 91764 ZIP codes, and we know the difference between a 1960s downtown lot and a newer east-side subdivision because we’ve torn off roofs on both. If you’re looking at a roof that’s been baked by Inland Empire summers and rattled by Santa Ana winds, call Noel Fierro and the Oakmont team at (866) 942-0875 for a straight assessment and a written quote.

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Why Oakmont Roof Repair Is Ontario’s Preferred Roof Replacement Company

Our Roof Replacement crew has spent enough time in Ontario to know what the heat does to a shingle. Summers here routinely push past 100°F, and we see the result on nearly every older home: shingles with cracked sealant strips, curled edges, and granules washing into the gutters after the first real rain. Homeowners call us because they want someone who won’t just slap new shingles over a problem and call it done. Noel Fierro leads a team that inspects first and tells you plainly whether the decking underneath is sound or needs to come out.

We’re a roofing-only company. That’s not a small distinction. Every technician who shows up in Ontario spends their entire workweek on roofs, not on kitchens or bathroom remodels. When we quote a replacement in 91762, we’re quoting from experience with skip sheathing and tight staging. When we quote 91764, we’re looking at newer OSB decking and different access. That kind of local familiarity saves you from a generic estimate that falls apart once the tear-off begins.

Roof Replacement Contractor in Ontario

A roof replacement contractor in Ontario has to plan for more than just the roof. On the older west-side blocks around downtown, we’re usually working on a 1950s or 1960s ranch where the driveway holds one truck, the neighbor’s wall sits three feet off the property line, and the dumpster has to go on the street with a posted no-parking permit. That changes how we stage materials, how many trips the crew makes, and how fast the tear-off moves. In the newer east-side developments off 91764, we get wider driveways and easier access, which means fewer staging costs and a faster start.

Expect a standard asphalt shingle replacement on a single-story Ontario home to run $9,800 to $14,500 when the existing decking is sound. If we find the original skip sheathing common in 91761 and 91762, add $2,500 to $4,000 for solid decking replacement before underlayment goes down. That’s the line item that catches homeowners off guard, and we’d rather tell you about it before we start than surprise you mid-project.

Full Tear-Off and Decking Assessment

Every replacement starts with the old layers coming off. On many Ontario homes we find two layers of shingles over the original wood sheathing. We check every board before anything new goes on. If the decking is spongy or gapped like the skip sheathing we see downtown, we replace it to meet current code so the new shingles have a surface that won’t flex and break their seal.

Permits and Local Review

Ontario requires a building permit for a full roof replacement. We pull permits, schedule inspections, and handle any overlay or historic-district review that applies to your block. Older homes near downtown sometimes trigger additional review, and we’ve navigated that process enough times to know what the city wants to see before the first bundle gets lifted.

Asphalt Shingle Roof Replacement in Ontario

An asphalt shingle roof replacement in Ontario is the most common job we do, and for good reason. The post-war tract housing that defines so much of this city was built with asphalt shingles, and after 40 or 50 years of Inland Empire sun, those shingles are done. The UV exposure out here accelerates granule loss and thermal cracking faster than homeowners expect. A roof that looks worn but okay in March can show multiple leaks by the time the Santa Anas hit in October.

We install architectural asphalt shingles on most Ontario homes because they hold up better to the wind and heat than the old three-tab style. A standard architectural shingle replacement runs $11,000 to $16,500 on a 1,200 to 1,800 square foot home, including tear-off, underlayment, new flashing, and haul-away. If we’re adding solid decking over skip sheathing, that pushes the total toward the higher end.

Heat-Rated Shingle Selection

Not every shingle handles 100°F summers the same way. We stock Atlas, Tamko, and CertainTeed lines that are engineered for high-heat and high-UV climates. The recommendation we make depends on your home’s sun exposure, roof pitch, and budget, not on what we happen to have sitting in a warehouse.

Wind-Resistant Nailing Patterns

Ontario sits right in the path of the Santa Ana winds that come through the Inland Empire every fall. A shingle’s wind rating only holds if the nailing pattern is right, and on older ranches with low-pitch gable roofs, that detail gets skipped on rushed jobs. We re-nail to manufacturer spec on every course, especially along the eaves and rakes where wind uplift starts.

Trusted Brands We Service in Ontario

We carry seven major roofing manufacturer lines including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For Ontario’s climate, we stock Atlas and Tamko for their high-heat and wind performance on mid-century ranches, and Boral for homeowners who want a premium option with stone-coated steel or tile alternatives. Because we’re not tied to one manufacturer, the shingle you get is the one that fits your home and your budget. We keep a steady supply of these materials at our facility, which means your Ontario replacement doesn’t stall waiting on a distributor.

Common Roof Replacement Problems We See in Ontario Homes

• Santa Ana wind lift on low-pitch gable ranches: The winds that tear through the Inland Empire each fall grab poorly sealed shingles along the rake edges and peel them back. We see this most on 1960s and 1970s homes where the original nailing pattern was either too sparse or the nails have worked loose after decades of thermal cycling.
• Hidden skip sheathing under post-war roofs: In the 91761 and 91762 blocks near downtown, many homes still have the original wood shingles over spaced 1×4 boards underneath the current asphalt layer. Contractors who don’t check cover it up, and the new shingles crack their sealant strips within one hot season because the deck flexes.
• Heat-exhausted shingles that curl and crack: Ontario’s semi-arid climate means intense UV and repeated 100°F-plus days from June through September. Asphalt shingles here age faster than the manufacturer’s printed lifespan suggests. By year 15 or 18, curled edges and missing granules signal the shingles are near the end.
• Tight-lot staging and debris control: On the older downtown blocks, tear-off debris and nail spills can end up in a neighbor’s yard or the shared alley. We stage with that in mind from day one, using street permits for dumpsters and magnetic sweepers after every tear-off day so the job doesn’t become a neighborhood problem.

Pricing for Roof Replacement in Ontario, CA

We Also Serve Cities Near Ontario

Beyond Ontario, we cover Montclair, Upland, Chino, and San Antonio Heights for roof replacement and repair. If you’re in one of those areas, Roof Replacement in Ontario standards carry over: same honest assessment, same brand options, and the same crew that knows Inland Empire heat and wind. Call (866) 942-0875 and we’ll confirm your service area right away.

FAQs About Roof Replacement in Ontario