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 Replacement Across Ontario
Roof replacement in Ontario, CA typically costs between $9,800 and $22,000 for a standard single-story tract home, depending on material, tear-off layers, and what we find once the old roof comes off. Most Ontario homes were built between 1960 and 1990, which means a huge share of them are hitting the end of their original roof’s service life right now. We know Ontario’s neighborhoods, its housing stock, and its wind patterns well enough to give you an honest read on whether you need a repair or a full Roof Replacement. Call (866) 361-0798 and we’ll start with an inspection, not a sales pitch.
Why Ridge Cap Roof Repair Is Ontario’s Preferred Roof Replacement Company
Ontario homeowners keep calling us back because we do the inspection, the repair, and the replacement with the same crew. That continuity matters when a roofer has to explain why a 1985 tile roof that looks fine from the curb is actually leaking at the underlayment. We don’t hand your roof off to a subcontractor who never saw the original report. The person who walks your roof is the person who tears it off and the person who nails down the new one.
Our depth across seven manufacturers – Owens Corning, IKO, Atlas, and others – means we recommend the material that fits Ontario’s heat and wind, not the one we happen to stock deepest. A single-brand contractor will sell you their one product whether or not it is the right call for a south-facing slope off Euclid Avenue. We carry the full range because Ontario homes run from 1960s wood-frame ranch houses in 91762 to 1990s concrete tile tract builds in 91761 and 91764, and those two roofs need completely different systems.
When we get a call from Ontario, we are usually on site within 48 hours for an inspection. That is fast enough to catch a leak before it becomes a ceiling repair, and slow enough that we are not rushing the diagnostic. Noel Cardenas set up the company around a repair-first philosophy: if the roof can be fixed properly for a fraction of replacement cost, that is what we recommend. If it cannot, we will show you why with photos and measurements, not pressure.
Styles & brands we work with
Roof Replacement Contractor in Ontario
A roof replacement contractor in Ontario handles full tear-off and re-roof projects on homes that have reached the end of their serviceable life, usually at the 30 to 45 year mark for the concrete tile and composition shingle systems common across the city. The job involves removing all existing material down to the decking, inspecting and replacing damaged sheathing, installing new underlayment and flashing, and laying the new roof covering to manufacturer spec. Ontario homeowners should expect to pay $11,500 to $19,000 for a full replacement on a typical 1,500 square foot single-story home, with flat or low-slope sections adding to the total.
What Gets Replaced?
We remove everything: old tile or shingles, the failed underlayment, the flashing around penetrations, and any rotted decking boards. The decking inspection is non-negotiable on an Ontario home because 40 years of inland heat and occasional wind-driven rain warps and softens plywood, especially along eaves and valleys.
When Replacement Beats Repair
If the underlayment has cracked across more than 30 percent of the roof area, patching is throwing money away. The same goes for tile fasteners that have loosened across multiple slopes. We will show you the slope-by-slope condition report before we ask you to decide.
Asphalt Shingle Roof Replacement in Ontario
Asphalt shingle roof replacement in Ontario runs between $9,800 and $15,500 for a standard single-story home, with architectural shingles trending toward the higher end and three-tab coming in lower. Much of Ontario’s older core, particularly the 91762 zip code, was built as wood-frame construction with original asphalt shingle roofs that are now 40 to 55 years old. Those roofs are past their rated lifespan. In the 91761 and 91764 tract belts, shingle replacements usually happen when homeowners choose to swap failing concrete tile for a lighter, more wind-resistant covering.
Architectural vs. Three-Tab
Architectural shingles are the default recommendation for Ontario. They carry a higher wind rating, which matters in a Santa Ana corridor, and they hold up better under the UV load of a 100 degree summer. Three-tab is the budget option, and we will install it if that is what the numbers require, but we will be straight that it costs more per year of service life in Ontario’s climate.
Decking and Underlayment on Shingle Jobs
On a 1970s Ontario home, plan for some decking replacement. Those roofs were built before modern ventilation standards, and heat trapped in the attic has dried and cupped the plywood from underneath. We itemize decking as a per-sheet allowance in the contract so the final number is never a surprise.
Trusted Brands We Service in Ontario
We install and service products from seven manufacturers, including Atlas, IKO, and Owens Corning, which means the material choice on your Ontario roof is driven by what the roof actually needs. A south-facing slope off Vineyard Avenue takes different shingles than a shaded north slope near Chaffey High School. Because we work across seven product lines, we can match material to heat, wind exposure, and budget without pushing a single brand. We stock common components locally for Ontario jobs, which keeps lead times short when a replacement is already underway.
Common Roof Replacement Problems We See in Ontario Homes
- Brittle felt underlayment under 1980s concrete tile. The tile looks fine from the street, but decades of 100 degree summers have baked the felt underneath until it sheds and cracks. Water gets through at penetrations and valleys, and the homeowner only finds out after the first heavy rain.
- Loosened tile fasteners from Santa Ana winds. Wind out of the Cajon Pass works tiles back and forth until fasteners back out, especially along the ridge and rake edges. Once fasteners go, wind gets under the tile and the underlayment degrades fast under direct UV.
- Failed decking on 1960s and 70s wood-frame homes. Poor attic ventilation in older Ontario construction traps heat and rots sheathing from below. We routinely replace decking on 91762 homes that looked rock solid from the attic access.
- Outdated wiring and undersized framing discovered at tear-off. Opening a 1972 Ontario house often reveals electrical and structural work that was never permitted. This triggers code upgrades that a competent roofer should have flagged in the original estimate.
See the difference
Before
After
Before
After
Before
AfterPricing for Roof Replacement in Ontario, CA
A full roof replacement in Ontario, CA generally lands between $9,800 and $22,000, with the spread driven by roof size, material choice, tear-off layers, and what the decking looks like once we open it up. Concrete tile removal and re-roof costs more than a shingle tear-off. Architectural shingles on a 1,200 square foot ranch in 91762 might run $12,000, while a two-story tile replacement in 91761 can reach $22,000. We write decking replacement, code upgrades, and flashing work into the initial estimate as line-item allowances, so the price does not drift once tear-off starts. Call (866) 361-0798 for a free estimate with a written, itemized scope.
We Also Serve Cities Near Ontario
Ridge Cap Roof Repair serves Ontario and the surrounding foothill and valley communities. We work regularly in Montclair, Upland, Chino, and San Antonio Heights. If you live in any of these areas and need a straight answer on Roof Replacement in Ontario or your own city, we’re the same crew with the same inspection-first approach.
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, in most cases we can confirm underlayment failure without a full tear-off. We lift tiles at penetrations, valleys, and ridge lines using a tile lift-and-inspect process, looking for cracked, shedding, or brittle felt underneath. On a 1986 east Ontario tract home off Euclid Avenue, our crew lifted the original concrete tile and found the felt underlayment cracked and shedding across the entire south-facing slope; we replaced it with a high-temp self-adhered membrane and re-fastened every tile with corrosion-resistant screws because the Santa Ana winds through the Cajon Pass had already pulled fasteners loose on the ridge. The homeowner now has a roof that matches the neighborhood’s tile profile but is ready for another 30 years of inland heat. Call (866) 361-0798 to schedule an inspection.
You will almost certainly find rotted or cupped decking on a 1972 Ontario roof that is being opened for the first time, plus outdated wiring and possibly undersized framing that was never permitted. The attic ventilation on that era of wood-frame construction in 91762 was usually inadequate, so heat has been cooking the plywood from underneath for five decades. We handle this by writing a per-sheet decking allowance and a code-upgrade allowance into the contract before we start, then pricing any actual finds in writing for your approval before we proceed. Call (866) 361-0798 for an inspection that tells you what you are really looking at.
Yes. We fasten and edge-detail every Ontario roof for sustained Santa Ana wind loads out of the Cajon Pass, using more fasteners per tile or shingle, corrosion-resistant screws, and fully sealed starter strip along the rake and eave edges. Loose fasteners and missing starter strip are exactly what we find on most wind-damaged Ontario roofs. A roof installed to interior valley standards will lose tiles in the first strong wind season. This is why we do not treat Ontario as just another Southern California city when we write a roof spec.
A roofing square is 100 square feet of roof area, and most Ontario quotes will show the total number of squares and a price per square for tear-off, underlayment, and material. The misleading part is usually the allowances: one quote might include decking replacement per sheet while another leaves it out entirely, so the lower quote jumps once tear-off starts. We give you a written per-square breakdown plus line-item allowances for decking, flashing, and code work. That makes an honest comparison possible. Call (866) 361-0798 and we will walk your roof and explain the numbers in plain terms.
We stop work on that section, document what we found with photos, and give you a written change order with a fixed price before we touch anything else. Ontario code requires certain electrical and structural upgrades once you open a roof and expose the framing, and a responsible contractor prices that risk into the original estimate as an allowance. The problem on 1960s and 70s Ontario homes is that unpermitted work from decades ago gets discovered when the roof deck comes off. We have handled enough of those to know how to keep the job moving without surprise billing.
Get Your Free Ontario Roof Replacement Estimate
If your Ontario roof is leaking, losing tiles in the wind, or simply past its serviceable life, start with an inspection. We’ll tell you honestly whether you need a repair or a full replacement, and we’ll back the recommendation with photos and measurements. Call (866) 361-0798 to schedule your free estimate. We serve all of Ontario, including 91758, 91761, 91762, and 91764, and we are ready to walk your roof this week.
Written by Noel Cardenas, Owner at Ridge Cap Roof Repair, serving Ontario and the Inland Empire.