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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Ontario
Roof repair in Ontario, CA typically runs $350 – $950 for targeted fixes like shingle replacement, flashing repair, and valley work, with flat roof patches landing between $450 and $1,200 depending on the membrane and damage extent. Most repairs across Ontario’s 91761, 91762, 91764, and 91758 ZIP codes take our crew half a day to a full day once materials are staged. We work the full lifecycle of roofing, from standalone inspections to targeted repairs to full replacement, so you get exactly what the roof needs and nothing you don’t. Call (833) 589-7971 for a straight answer and a free estimate.
Why Hollywood Roofing Co Is Ontario’s Preferred Roof Repair Company
Ontario homeowners call us because we understand what the wind does here. The Santa Ana events that funnel down the Cajon Pass toward the Cucamonga and Etiwanda corridors don’t respect a poorly fastened ridge cap. Roland Vega built Hollywood Roofing Co on the principle that a repair should match the conditions the roof actually faces, not a generic checklist. That’s why we stock wind-rated fastening systems and work across seven major material brands, including GAF repair in Ontario, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. Seven leading brands, one honest recommendation, matched to your home.
Our Roof Repair crew has spent enough mornings on the north side of Ontario, in the older tract neighborhoods around Euclid Avenue and Holt Boulevard, to know which roofs fail first after a wind event and why. We show up with the right materials, give you a written line-item quote before any work starts, and don’t push a replacement when a repair will hold. That approach earns repeat calls and referrals across Ontario year after year.
We’re licensed and insured, and every repair comes with a workmanship warranty in writing. For homeowners from the 91761 central district up through the 91764 north corridor, we’re local enough to know the houses and the failure patterns, and established enough to stand behind the work.
Styles & brands we work with
Emergency Roof Repair in Ontario
Emergency Roof Repair in Ontario usually means one thing: a Santa Ana event just tore something loose and the next rain will find it. The call comes from a homeowner who looked up after the winds died down and saw a ridge cap hanging off, a lifted shingle tab, or a patio cover peeled back from the roofline. That’s our signal to get a crew over, tarp the exposure if the decking is open, and schedule the permanent fix before water gets inside.
Same-Day Assessment and Tarp-Over
We prioritize inspections after major wind events, especially across the foothill-adjacent neighborhoods and the north-side subdivisions where uplift hits hardest. A tarp-over on an exposed section typically runs $250 – $450 in Ontario, and it buys you time to choose the right permanent repair without mold or ceiling damage setting in.
Permanent Wind-Damage Fixes
Once the decking is dry and sound, we replace sheared ridge caps, re-nail lifted shingles to spec with six nails per shingle, and install wind-rated ridge vents where the old caps failed. Expect $400 – $900 for a typical Santa Ana damage repair across most Ontario homes, depending on linear feet and slope access.
Flat Roof Repair in Ontario
Flat Roof Repair in Ontario shows up most often on the attached patio covers, garage additions, and porch roofs that mid-century and early-2000s builders loved here. These low-slope and flat sections take brutal thermal punishment: summer highs over 100°F expand the membrane, winter nights contract it, and the cycle eventually cracks the surface or pulls the flashing loose. Then the first real rain of the year finds every weak point at once.
Patch Versus Section Replacement
A localized patch on a flat or low-slope section over an Ontario patio or garage runs $450 – $900 when the underlying substrate is sound. If the membrane is fully cracked and brittle from UV exposure, we’ll often recommend a section re-membrane instead, which lands between $1,200 and $2,800 depending on square footage and membrane type. We’ll tell you which one makes sense, in plain words, before we touch anything.
Flashing and Drainage Re-Set
Most flat-roof leaks in Ontario homes aren’t the membrane itself. They’re the edge flashing pulling away from stucco, or the drain and scupper points clogging with monsoon debris. Re-setting and sealing flashing, re-pitching a small area, or clearing and re-membraneing the drainage points usually runs $300 – $700 and keeps the next winter from becoming an interior repaint.
Trusted Brands We Service in Ontario
Because we install and repair across seven leading material brands, our Ontario customers get a recommendation that fits their home rather than a one-brand sales pitch. We work with CertainTeed and Owens Corning for dimensional shingle replacements, and we often recommend IKO or Atlas when a budget is tight and the home is mid-tier. That breadth means we can match the repair to the home’s existing materials and the homeowner’s budget, and we keep common match components staged locally so turnaround on repairs across the 91764 and 91761 corridors stays short.
Common Roof Repair Problems We See in Ontario Homes
- Santa Ana wind uplift: Wind events funneling from the Cajon Pass through the Etiwanda and Cucamonga corridors shear ridge caps and lift shingle tabs on windward slopes. The north-side and foothill-adjacent homes get hit first, and the leaks show up weeks later when the winter rain arrives.
- UV and heat fatigue: Ontario summers regularly push past 100°F, baking asphalt shingles until they lose granule and the sealant strips dry out. By year 12 or 15 on an original builder roof, you’re looking at brittle tabs and flashing that’s pulled clean off the wall.
- Thermal cracking on flat and low-slope sections: The patio covers, garage additions, and porch roofs that Ontario’s stock is known for expand and contract hard between summer and winter. Once the membrane or rolled composite cracks, monsoon debris and winter rain have a straight path inside.
- Aging builder-grade materials across the 91761 and 91762 commutes: Whole blocks of mid-century tract homes were originally roofed with the cheapest three-tab shingle the builder could buy. Many of those roofs are now well past their service life, and the failure is often local: a valley, a chimney flashing, a single slope that cooked harder than the rest.
See the difference
Before
After
Before
After
Before
AfterPricing for Roof Repair in Ontario, CA
Here’s what we see across Ontario in 2025 and early 2026. Shingle replacement on an older home runs $350 – $800 for a typical ridge-to-eave section, depending on access and match material. Flashing repair around chimneys and sidewalls lands at $250 – $600. Valley repair runs $400 – $900, vent boot replacement $200 – $450, and flat-roof patches $450 – $1,200. What moves the number is roof pitch, two-story access, how much decking shows rot once we open it, and whether the existing material matches anything we stock locally. Every quote is written, line-item, and fixed. Call (833) 589-7971 for an exact number, and the estimate is free.
We Also Serve Cities Near Ontario
Our roofers work throughout the surrounding area, including Montclair, Upland, Chino, and San Antonio Heights. If your home is in one of those communities and you’re looking for Roof Repair in Ontario quality, the same crew handles it with the same local knowledge and the same fixed pricing.
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 Repair in Ontario
Within a week is smart, and sooner if you see visible lift or missing material. The wind damage itself isn’t what leaks; it’s the next rain finding the gap. Call (833) 589-7971 and we’ll schedule an inspection quickly after major wind events across the north side and foothill areas.
Yes, in most cases. If the membrane is locally cracked and the substrate is sound, a patch runs $450 – $900. If the whole section is brittle from UV cooking, we’ll show you photos and give you a re-membrane quote rather than patching a surface that’s about to fail in six more places. Estimates are free.
Wind uplift from Santa Ana events funneling through the Cajon Pass and down the Etiwanda and Cucamonga corridors. The windward slope gets hit with enough sustained force to shear caps that were fastened with standard nails. We re-install with wind-rated nailing patterns and ridge vents that hold.
Expect granular loss and drying sealant once temperatures stay over 100°F for weeks. Ontario decks bake, shingles get brittle, and flashing peels. A roof that looked fine in March can show multiple entry points by October, which is why we recommend a standalone inspection before the rains. Call (833) 589-7971 to set one up.
Yes. Monsoon debris ends up blocking drains and scuppers on low-slope sections, and we respond to those calls across the 91761, 91762, 91764, and 91758 ZIP codes. Tarp-over runs $250 – $450 when decking is exposed, and the permanent repair is quoted separately, in writing, before we start. Reach us at (833) 589-7971.
Call Hollywood Roofing Co for Roof Repair in Ontario, CA
Whether it’s a Santa Ana wind repair, a flat-section patch, or a full replacement down the road, we’ll walk you through what the roof actually needs and what it should cost. Free estimates, fixed pricing, and the same crew from Roof Repair to replacement if it ever comes to that. Call (833) 589-7971 and Roland Vega will make sure you get a straight answer.
Written by Roland Vega, Owner at Hollywood Roofing Co, serving Ontario and the surrounding Inland Empire.