Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
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Before
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Before
AfterRoofers in Ontario, CA
Roofers in Ontario, CA face a market unlike anywhere else in Southern California: a city split between massive logistics facilities around Ontario International Airport and residential neighborhoods where 1950s ranch homes with failing built-up roofs sit two miles from 1980s tile-roof subdivisions. We’re Mercer Roofing, and our crews work across both worlds, from Euclid Avenue historic bungalows to warehouse districts near the 10 and 15 freeways. Call (743) 200-8347 for a free estimate, or read on to see what Ontario’s specific climate and building stock mean for your roof.
Why Ontario Homes Are Different
Ontario sits in a pressure cooker. Our inland valley position traps radiant heat that coastal LA never sees, with summer temperatures regularly climbing past 105°F, 10 – 15°F hotter than the basin. That sustained thermal load bleaches granules off asphalt shingles, accelerates thermal cracking, and dries out roofing underlayment years ahead of rated lifespans. We’ve replaced 20-year shingles in Ontario’s Parkside and Colony Heights neighborhoods after just 12 years, simply because the UV exposure here is relentless.
The housing stock compounds the problem. The historic Euclid Avenue “Model Colony” corridor holds early-1900s Craftsman bungalows with original clay tile or wood shake that needs careful, specialized handling. The 1950s – 1970s ranch tracts, common north of Holt Boulevard and west of Grove Avenue, were built with low-slope geometry and built-up roofing that’s now well past its service life. Those shallow pitches create drainage problems during atmospheric river events, and we’ve seen chronic ponding in neighborhoods like Ontario Ranch and the older tracts near Cucamonga Creek. The 1980s – 2000s subdivisions brought concrete tile, but Santa Ana wind events, hot dry gusts funneled through Cajon Pass and into the Inland Empire, periodically lift improperly fastened tiles. Wind-rated fastening patterns aren’t an upgrade here; they’re a necessity.
And then there’s the commercial side. Ontario’s warehouse corridor, dense with distribution centers serving e-commerce and logistics operations, means local roofers handle TPO, EPDM, and modified bitumen on flat roofs measured in hundreds of thousands of square feet. A single re-roofing contract on one of these facilities can exceed 500,000 square feet, more than months of residential work combined.
Our Main Ontario Services
Most calls we get from Ontario homeowners fall into three categories: stopping an active leak, replacing an aging or storm-damaged roof, or handling the full scope of a roofing project from inspection through installation.
Roof Repair in Ontario
Repair work in Ontario means tracking down leaks in low-slope ranch geometry where water travels sideways before it drips, or replacing wind-lifted tiles after Santa Ana gusts. We stock GAF and Atlas shingles locally, and our repair crews carry common tile profiles for the area’s Mediterranean-style subdivisions. Every repair comes with our written 365-Day Done Right Promise: if the fix fails, we come back free. Roof Repair in Ontario
Roofing Company in Ontario
As a full-service roofing company in Ontario, we handle everything from emergency tarping after wind events to complete tear-offs on historic Model Colony homes where modern materials must meet preservation guidelines. Our technicians are background-checked, identity-verified, and Threshold Verified, and we send you their name and photo before they arrive. The badge at the door matches the face on your phone. Roofing Company in Ontario
Roof Installation in Ontario
New roof installation in Ontario requires material choices calibrated to our thermal extremes. We specify heat-resistant underlayment and wind-rated fastening for tile, and we work with GAF, Atlas, Tamko, and Boral products recognized by manufacturers for proper installation. Every project starts with a written, line-item price, no exceptions. Permits are pulled and inspections scheduled as part of our standard workflow. Roof Installation in Ontario
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Ontario
We install and repair with GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral products, keeping common shingles and tiles stocked for fast turnaround on Ontario repair calls. See our brands for full specifications and warranty details.
Pricing for Roofers in Ontario, CA
| Service | Typical range in Ontario |
|---|---|
| Minor shingle repair (1 – 3 shingles) | $180 – $340 |
| Tile replacement (small section, wind damage) | $450 – $850 |
| Flashing repair (chimney or vent) | $350 – $650 |
| Flat roof patch (TPO/EPDM, commercial) | $500 – $1,200 |
| Partial re-roof (1,500 sq ft, asphalt shingle) | $6,500 – $10,500 |
| Full roof replacement (2,000 sq ft, asphalt shingle) | $9,000 – $16,000 |
| Concrete tile roof replacement (2,500 sq ft) | $18,000 – $32,000 |
| Low-slope built-up roof replacement (1,500 sq ft) | $7,500 – $14,000 |
| Ridge vent installation | $800 – $1,500 |
| Skylight repair/replacement | $650 – $1,400 |
What pushes Ontario prices higher: steep pitches on two-story homes common in newer subdivisions, tile weight requiring structural reinforcement on older ranches, and the heat-resistant underlayment our climate demands. What you’ll never see: a surprise on the invoice. We put every price in writing before work starts, every time.
Neighborhoods We Serve in Ontario
Our crews work across Ontario’s full residential map, from historic core to newest development. Most Ontario neighborhoods see us within one business day of scheduling.
- Model Colony (Euclid Avenue historic district)
- Parkside
- Colony Heights
- Ontario Ranch
- Creekside (near Cucamonga Creek)
Service Area – Cities Near Ontario
Dispatch and scheduling for our Ontario work are coordinated from our Inland Empire office, with crews serving the full surrounding area. We regularly handle projects in Montclair, CA, Claremont, CA, Upland, CA, and Rancho Cucamonga, CA, often crossing city lines on the same day for neighboring estimates.
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 Roofers in Ontario
We typically schedule estimates within one business day for Ontario addresses, and a live person answers our phone 24/7 to book your slot. Call (743) 200-8347 to schedule your free estimate.
Yes, the City of Ontario requires permits for full roof replacements; repairs under 100 square feet generally do not need permitting. We pull all required permits and schedule inspections as part of our standard process, included in your written quote.
Many Ontario subdivisions, especially in Ontario Ranch and newer developments, have HOA architectural guidelines that specify approved colors and materials. We review your HOA documents before recommending products and can provide manufacturer samples for board approval. Call (743) 200-8347 and we’ll walk through your specific requirements.
What happens when you call
- 1A real person answersNo phone trees - talk to a local roofing pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Ontario Customers Say
"Good roof repair. The crew was a day later than planned because of rain, which I understand, but the scheduling got moved twice. Work itself is clean and has held up."
- Dale T."Replaced the ridge cap and drip edge, and fixed a sagging gutter that nobody else mentioned. Fair price."
- Phil N."Great shingles and a clean install. Wish the cleanup had been done the same day, but they came back the next morning and finished it."
- Tasha G.