Roof Replacement in Ontario — Free Inspection, Itemized Written Quote

Fast, Reliable Roof Replacement Across Ontario

A full roof replacement in Ontario typically runs $9,500 to $18,500 for an average single-family home, depending on material choice, square footage, and what we find once the old roof comes off. We’re Moreno Valley Roof Repair, led by Ruben Ibarra, and our Roof Replacement crews work across Ontario weekly, from the mid-century tracts off Euclid Avenue to the newer neighborhoods near Ontario Ranch. Call us at (866) 217-3967 and we’ll get an inspector on your roof within a few days – not a few weeks.

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Why Moreno Valley Roof Repair Is Ontario’s Preferred Roof Replacement Company

Ontario homeowners see a lot of roofing trucks, but most of them push one brand and one brand only. Ours is a different model. We install and supply materials from GAF, CertainTeed, and Owens Corning – three of the leading shingle manufacturers in North America – as well as IKO, Atlas, Tamko, and Boral when the job calls for tile or a specific price point. That means the recommendation you get in Ontario is driven by your roof, your exposure, and your budget, not by whatever pallet is sitting in our yard.

Ruben Ibarra built this company around a simple idea: inspection first, replacement when it’s actually needed, repair when it isn’t. In Ontario, where the heat and wind punish roofs differently than they do in coastal LA, that honest read matters. We regularly walk Ontario roofs where the shingles look tired from the street but have years left, and just as often we see tile roofs that look fine while the underlayment underneath is shot. A company that won’t climb up and look before they quote isn’t doing you any favors.

Flat Roof Replacement in Ontario

Flat Roof Replacement in Ontario is a different trade from residential shingle work, and it’s a big one here. The warehouse and logistics belt running through the 91761 and 91764 ZIPs – around Ontario International Airport and along the 10 and 15 corridors – has hundreds of low-slope commercial buildings that need membrane replacement, new insulation board, and repaired parapet flashing on a schedule that has nothing to do with what a stucco tract home needs. This is not a job you hand to a crew that only does pitched shingle roofs.

For a flat roof on a smaller commercial building or an Ontario home with a low-slope section, a full replacement involving TPO or modified bitumen membrane typically runs $7 to $12 per square foot in Ontario’s market. If the existing roof is too far gone for a simple recover and needs tear-off plus new ISO board, costs climb from there. The key is catching it before a monsoon-season downpour finds the seam that opened over a summer of 100°F afternoons.

What We Check On Every Ontario Flat Roof

We look at the seams first – that’s where heat-welded membrane fails after repeated thermal cycling. Then we check the flashings at penetrations and parapet walls, because those are the first places water gets in on a flat roof in Ontario. We also walk the roof with a moisture meter to find wet insulation that hasn’t shown itself inside the building yet.

TPO vs Modified Bitumen for Ontario’s Climate

TPO handles Ontario’s UV intensity well and reflects heat, which matters when your building’s cooling bill is set by roof temperature. Modified bitumen costs less upfront and holds up to foot traffic better, which is why we still install plenty of it on Ontario maintenance decks. We stock both and will tell you the real tradeoff for your building’s specific exposure.

Roof Installation in Ontario

Roof Installation in Ontario means new construction, additions, and full teardowns on existing homes across the city’s older ZIPs. On the mid-century and 1970s stucco tracts in 91761 and 91762, a new roof installation often starts with removal of the old concrete tile or asphalt shingle layer, then a decision about the deck underneath – because what we find once the old roof comes off is the single biggest variable in an Ontario roof quote.

New asphalt shingle installation on an Ontario home typically runs $350 to $550 per square for architectural shingles, installed, with tear-off and underlayment included. A tile installation runs higher – factor $700 to $950 per square for concrete tile over new underlayment. These are real Ontario market ranges, not generic national numbers. If you’re getting quotes far below them, ask how much allowance is in writing for what’s underneath.

When the Decking Needs Replacing

On older Ontario homes, especially the 1960s and 70s builds around 91762, decking isn’t always plywood – sometimes it’s spaced board, which doesn’t meet current code for a nail base. If a permit inspection finds undersized rafters or rotted decking, the replacement scope grows. That’s why we write a decking allowance into every Ontario reroof contract, so the price on paper is what you actually pay.

Full Tear-Off vs Second Layer

California code allows a second shingle layer in some cases, but we rarely recommend it in Ontario. The heat here bakes an extra layer into early failure, and a second layer hides whatever’s happening underneath until it’s too late. We’d rather pull the old roof and inspect the deck than lock in a shorter lifespan to save a modest amount upfront.

Trusted Brands We Service in Ontario

We stock materials from seven major manufacturers, and for Ontario homes we lean on the brands that hold up to inland heat: GAF Timberline and Camelot lines for architectural shingle roofs, CertainTeed Landmark and Presidential Shake when homeowners want a heavier shadow line, and Owens Corning Duration for its tensile strength in Santa Ana conditions. Boral concrete tile is a common match for the existing tile profiles on Ontario’s older tract homes, and we can source replacement tile to match what’s already on your roof rather than forcing a full-field swap. Having all of these in our supply chain means your material lead time doesn’t stall your project.

Common Roof Replacement Problems We See in Ontario Homes

• Dried-out concrete-tile underlayment on 91762 tract homes. The tile above is often fine – the original felt underneath has turned brittle from decades of 100°F+ attic heat. The leak shows up at the ceiling before anything shows up on the roof.
• UV-baked asphalt shingles failing at valleys and drip edge first. Ontario’s sun attacks the granule surface harder than coastal exposure does. A shingle roof that would last 25 years in the South Bay often cracks and curls at the edges in 15 here.
• Santa Ana wind damage to ridge caps and flashing. Wind events in the fall loosen ridge tiles, tear flashing laps at chimney and vent penetrations, and open gaps that sit there dry until the first monsoon-season downpour finds them.
• Undersized framing and code-upgrade triggers on mid-century homes. Once an Ontario replacement opens up a 1950s or 60s roof, the permit inspection often flags rafters that don’t meet current snow-weight or shear standards, which adds scope to the project.

Pricing for Roof Replacement in Ontario, CA

We Also Serve Cities Near Ontario

Our crews cover the whole west Inland Empire from our Moreno Valley base. Beyond Ontario, we regularly work in Montclair and Upland along the 10, in Chino and San Antonio Heights to the west, and across the surrounding unincorporated pockets. Same inspection-first approach, same written allowances, no matter which side of the city line your roof is on.

FAQs About Roof Replacement in Ontario