Roofing in Ontario Built for Inland Empire Heat

Roofing in Ontario means standing up to 100-degree summers, Santa Ana winds, and the occasional winter downpour that finds every weak flashing. Our crews work the rooftops here every week, from older tract homes near Euclid Avenue to newer builds off Milliken. We install asphalt shingles, metal panels, and flat roof systems that hold up to real Inland Empire weather. Same-day estimates, no surprises.

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Warranty Backed Workmanship Guaranteed in Ontario

Why Ontario Homeowners Call Us for Roofing

Ontario, California sits where the Inland Empire meets the San Gabriel Valley, and that geography creates roofing conditions you do not find on the coast. Summer attic temperatures push past 140 degrees, which cooks asphalt shingles from underneath and shortens their life by years. Winter brings the opposite problem: rain that finds every cracked flashing and worn pipe boot. We have worked roofs across Ontario long enough to know which neighborhoods have the 20-year-old three-tab shingles that are ready to fail and which ones have tile that just needs maintenance. Roofing in Ontario is not a one-size job. We match the system to the house, the pitch, and the budget. Whether you are near the Ontario Convention Center or out by Ontario Mills, our crews know the streets and the building stock.

Locally licensed and insured in Ontario
Same-day diagnostics and written estimates
Real workmanship warranty in writing
Background-checked, in-house technicians

Roofing Services Available in Ontario

Ontario roofs take a beating from heat, wind, and the occasional heavy rain. We offer the full range of roofing services here, from emergency leak repair to full replacement. If you are searching for a roofer in Ontario who can handle both the repair today and the replacement next year, we do both. Our crews carry the tools and materials to start most jobs the same week you call.

Roof Installation

New roof installation in Ontario means picking a system that handles 100-degree summers. We install GAF and Owens Corning Duration shingles, standing-seam metal, and tile on new construction and additions. Whether you are building near Ontario Ranch or adding a room off Vineyard Avenue, we set the underlayment, flashing, and ridge vents to code.

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Roof Replacement

Most Ontario homes built before 1990 are on their second or third roof. We tear off the old layers, inspect the decking for rot, and install a new system with upgraded underlayment. Neighborhoods like Creekside and the tracts near Bon View Park see a lot of this work. We haul away the debris and leave your yard clean.

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Roof Repair

A cracked flashing or a few missing shingles does not mean you need a whole new roof. We repair tile, shingle, and flat roofs across Ontario. Our trucks carry common materials so we can fix most issues in one visit. If you are near downtown Ontario or off Mountain Avenue, we can usually get there the same day.

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Roof Leak Repair

Leaks in Ontario often show up after the first winter rain, tracing back to failed pipe boots, cracked flashing, or worn valley metal. We find the source with moisture meters and water testing, not guesswork. Then we fix it and verify the repair holds. We cover everything from small ceiling stains to active drips near the 60 freeway.

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Roof Inspection

A roof inspection in Ontario should tell you what you actually need, not just sell you a replacement. We check shingles, flashing, vents, and attic ventilation, then give you photos and a straight assessment. Homeowners buying or selling near Ontario International Airport use our inspections for real estate transactions. We also do annual maintenance inspections.

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Roof Maintenance

Ontario heat dries out sealants and loosens fasteners faster than in coastal cities. Our maintenance program includes annual inspections, resealing exposed nails, clearing debris from valleys, and checking attic ventilation. We serve homeowners and property managers across Ontario who want to catch small problems before they become leaks.

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Emergency Roofing Services

When a storm tears off shingles or a tree limb punches through your deck, you need someone now. We offer 24/7 emergency roofing in Ontario, including tarp-overs and temporary repairs to stop water intrusion. We respond fast, secure the roof, and schedule the permanent fix. Call us any hour.

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Flat Roofing

Many commercial and older residential buildings in Ontario have flat or low-slope roofs. We install and repair TPO membrane, EPDM membrane, and modified bitumen systems. Ponding water is a common issue here, so we check drainage and slope before we quote. We work on warehouses near the 10 freeway and homes with flat additions.

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Asphalt Shingle Roofing

Asphalt shingles are the most common roof in Ontario, and for good reason. They handle the heat well when installed with proper ventilation. We install GAF, Owens Corning, CertainTeed, and Malarkey shingles. If your current shingles are curling or losing granules, we can replace them with a system rated for this climate.

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Metal Roofing

Metal roofing is growing in popularity across Ontario because it reflects heat and lasts decades. We install standing-seam and metal shingle systems that stand up to Santa Ana winds. Homeowners near the foothills often choose metal for fire resistance. We handle the framing, underlayment, and flashing to match.

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Service · #1

Roof Installation in Ontario

When you need expert roof installation in Ontario, RoofPros California delivers durable, code-compliant systems built for the local climate. Our crews understand the intense heat, Santa Ana winds, and occasional heavy rains that impact Ontario neighborhoods like Creekside and College Park. We install asphalt shingle, tile, and metal roofs with precision, using premium underlayments and flashing details that prevent leaks and extend service life. From permit coordination to final inspection, we handle every step so your new roof performs beautifully for decades.

Climate-Smart Installation Methods

Ontario's inland heat and wind-driven rain demand roofing systems that resist thermal cycling and uplift. We use reinforced underlayments and enhanced fastening patterns tested for high-wind zones. For homeowners searching for a reliable roofing contractor in Ontario, our installation process includes attic ventilation calculations and drip edge placement that protect against moisture intrusion and premature aging.

Materials Suited to Ontario Homes

Many Ontario residences feature Spanish tile, concrete tile, and architectural asphalt shingles that match the region's diverse architecture. We help you select materials with high fire ratings and UV stability. Our team also installs cool-roof options that reflect sunlight, reducing cooling costs during Ontario's hot summer months while maintaining curb appeal.

Permits and Local Code Compliance

Roof installation in Ontario requires permits and adherence to California building standards, including Title 24 energy requirements. We manage the paperwork and schedule inspections so your project stays on track. Our knowledge of local codes ensures your new roof meets wind, fire, and ventilation mandates, giving you peace of mind and a smooth approval process.

Complete tear-off and disposal of old roofing materials
Synthetic underlayment and ice-and-water shield at valleys
New flashing, vents, and pipe boots installed for leak protection
Final magnetic sweep for nails and full site cleanup

Roof Replacement in Ontario

Roof replacement in Ontario is a major investment, and RoofPros California makes it seamless from start to finish. Whether your current roof is aging, storm-damaged, or simply outdated, we remove and replace it with a system designed for the area's hot, dry summers and windy conditions. Serving neighborhoods like Ontario Ranch and Euclid Avenue corridors, we prioritize structural integrity, energy efficiency, and curb appeal. Our team guides you through material choices and financing options to fit your budget.

01

Signs You Need Replacement

Curling shingles, granule loss, and frequent leaks often signal that replacement is more cost-effective than repeated repairs. In Ontario, roofs older than 20 years may also suffer from brittle underlayment and rusted flashing. If you notice daylight through attic boards or sagging decking, schedule a roof replacement Ontario assessment before further damage occurs.
02

Upgrade Options for Efficiency

Modern replacement roofs can include reflective shingles, improved insulation, and radiant barriers that lower attic temperatures. Ontario homeowners often choose cool-roof rated products to reduce energy bills. We also install ridge vents and intake vents that promote balanced airflow, extending the life of your new roofing system and improving indoor comfort.
03

Timeline and Process Explained

Most residential roof replacements in Ontario take one to three days, depending on size and material. We begin with a detailed tear-off, inspect the deck for rot, then install underlayment, flashing, and your chosen roofing. Our crew protects landscaping and keeps you informed daily. After completion, we walk the site and provide a written warranty.

Full tear-off and deck inspection for hidden rot
Upgrade to energy-efficient cool-roof shingles or tiles
New flashing, vents, and pipe boots installed
Magnetic nail sweep and complete debris removal

02 / 10

Service

5+ YEARS · ONTARIO

Roof Repair in Ontario

Roof repair in Ontario requires a keen eye for the specific wear patterns caused by intense sun, wind, and occasional heavy rain. RoofPros California specializes in diagnosing and fixing leaks, broken tiles, and damaged flashing before they escalate. We serve homeowners near Ontario International Airport and throughout the Inland Empire, delivering prompt, lasting repairs. Our technicians use color-matched materials and proven techniques to restore your roof's integrity and appearance without unnecessary replacement.

Common Ontario Roof Problems

Ontario's climate often causes cracked tile, lifted shingles, and deteriorated sealant around vents and chimneys. Wind-driven rain can force water under flashing, leading to ceiling stains. We also see rusted valley metal and loose fasteners after Santa Ana wind events. Identifying these issues early through a roof repair Ontario inspection prevents costly structural damage.

Our Targeted Repair Approach

We begin with a thorough leak detection using moisture meters and visual inspection. Then we repair or replace damaged underlayment, flashing, and roofing material. For tile roofs, we carefully lift and reset surrounding tiles. For shingle roofs, we weave in new shingles for a seamless patch. Every repair is sealed and tested to withstand Ontario's weather extremes.

Preventing Future Damage

After repairing your roof, we provide recommendations to avoid repeat issues. This may include trimming overhanging branches, clearing debris from valleys, and applying UV-resistant sealant to exposed fasteners. Regular maintenance checks, especially before rainy season, help Ontario homeowners protect their repair investment and extend roof lifespan.

Leak detection using moisture meters and infrared imaging
Color-matched tile and shingle replacement for seamless repairs
Flashing repair and resealing around chimneys and vents
Post-repair water test to confirm leak-free performance

Roof Leak Repair in Ontario

A roof leak can quickly damage your home's interior, insulation, and structure. RoofPros California provides fast, reliable roof leak repair in Ontario, tracing the source and fixing it permanently. We understand how local weather patterns-from summer heat to winter storms-create unique leak points. Whether you see water stains in Ontario Ranch or hear drips in a historic downtown building, our team responds quickly with advanced detection tools and durable repair methods.

Advanced leak detection with moisture meters and hose testing

Promise

“Leaks often originate far from the visible stain. We use moisture meters, hose testing, and attic inspection to pinpoint entry points. In Ontario, common culprits include failed pipe boots, cracked flashing, and wind-…”

— Ontario customer

Finding the True Leak Source +

Leaks often originate far from the visible stain. We use moisture meters, hose testing, and attic inspection to pinpoint entry points. In Ontario, common culprits include failed pipe boots, cracked flashing, and wind-damaged shingles. Our systematic roof leak repair Ontario process ensures we fix the cause, not just the symptom, preventing recurring damage.

Emergency Leak Containment +

For active leaks, we offer temporary tarping and emergency patching to stop water intrusion immediately. This protects your belongings and prevents mold growth while we schedule permanent repairs. Ontario homeowners appreciate our rapid response during heavy rain events, when every minute counts toward minimizing interior damage.

Permanent Repair Solutions +

Once the source is identified, we perform lasting repairs using high-quality sealants, replacement flashing, and new underlayment. For tile roofs, we carefully reset tiles; for shingle roofs, we integrate new shingles. We also address attic ventilation issues that can contribute to condensation-related leaks, ensuring your Ontario home stays dry.

Advanced leak detection with moisture meters and hose testing
Emergency tarping and temporary patching available 24/7
Permanent repair of flashing, boots, and underlayment
Attic inspection to identify hidden moisture and mold

Service · #5

Roof Inspection in Ontario

A professional roof inspection in Ontario is the best way to catch small issues before they become expensive problems. RoofPros California offers comprehensive inspections for homeowners, real estate transactions, and insurance requirements. We evaluate shingles, tiles, flashing, gutters, and attic ventilation, paying close attention to damage caused by Ontario's sun, wind, and occasional heavy rains. Our detailed reports include photos and prioritized recommendations, helping you make informed decisions about maintenance or repair.

What Our Inspection Covers

We examine roof surface, penetrations, valleys, and eaves for wear. In the attic, we check for leaks, proper insulation, and ventilation. We also assess gutter condition and drainage. For Ontario homes, we specifically look for UV degradation, wind-lifted shingles, and cracked tile that may not be visible from the ground.

When to Schedule Inspection

Ideally, schedule a roof inspection Ontario annually and after major storms. If you're buying or selling a home in Ontario, a pre-listing or pre-purchase inspection provides negotiating power. Also, after any roof repair or installation, a follow-up inspection ensures workmanship and warranty compliance.

Understanding Your Report

Our reports use clear language and photos to document current condition and remaining lifespan. We categorize findings as urgent, moderate, or monitor. You'll receive a prioritized action plan with cost estimates. This transparency helps Ontario homeowners budget for future roofing needs and address safety concerns promptly.

Detailed roof surface and attic ventilation evaluation
Photo-documented report with prioritized repair recommendations
Gutter and drainage assessment for proper water flow
Post-storm and real estate transaction inspections available

Roof Maintenance in Ontario

Regular roof maintenance in Ontario is essential to maximize your roof's lifespan and avoid costly emergency repairs. RoofPros California offers tailored maintenance programs that address the region's unique climate challenges, including intense UV exposure, Santa Ana winds, and seasonal rain. We serve neighborhoods from Creekside to Ontario Ranch, providing thorough inspections, debris removal, and preventative treatments. Our proactive approach keeps your roof in top condition, preserving its appearance and protecting your home investment year after year.

01

Seasonal Maintenance Checklist

We recommend servicing your roof at least twice a year. In spring, we clear winter debris and check for storm damage. In fall, we remove leaves from valleys and gutters before rains. For Ontario homeowners, summer maintenance includes checking for heat-related cracking and applying UV sealant to exposed areas.
02

Extending Roof Lifespan

Simple tasks like trimming overhanging branches, replacing cracked tiles, and resealing flashing can add years to your roof. Our roof maintenance Ontario program includes these services plus attic ventilation checks. By addressing minor issues early, you avoid water intrusion and structural damage that lead to premature replacement.
03

Preventative Treatments We Offer

We apply protective coatings to flat roofs, replace worn pipe boots, and reinforce flashing seals. For tile roofs, we re-secure loose tiles and replace broken ones. These treatments are designed for Ontario's climate, where thermal expansion and wind can loosen fasteners over time.

Bi-annual roof inspections with photo documentation
Gutter and valley debris removal for proper drainage
Replacement of cracked tiles and worn pipe boots
Application of UV-resistant sealants and protective coatings

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Service

5+ YEARS · ONTARIO

Emergency Roofing Services in Ontario

When a storm, fallen tree, or sudden leak threatens your home, RoofPros California delivers rapid emergency roofing services in Ontario. Our team is available 24/7 to secure your property, prevent further damage, and restore your roof. We understand the urgency-water intrusion can ruin belongings and compromise structure within hours. Serving all Ontario neighborhoods, we arrive with tarps, tools, and materials to stabilize your roof until permanent repairs can be made.

Rapid Response and Tarping

Our emergency crews are on call around the clock. Upon arrival, we assess safety, then install heavy-duty tarps and temporary seals to stop leaks. For Ontario homeowners, this immediate action minimizes interior damage and buys time for insurance claims and permanent repairs.

Storm and Wind Damage Repair

Santa Ana winds and winter storms can lift shingles, crack tiles, and tear flashing. We secure loose materials, remove debris, and make structural repairs as needed. Our emergency roofing services Ontario team also documents damage for insurance purposes, providing photos and detailed reports.

Working with Your Insurance

We help you navigate the insurance claims process by providing thorough documentation and repair estimates. Our knowledge of local codes ensures repairs meet requirements. We communicate directly with adjusters to streamline approvals, so you can focus on restoring your home.

24/7 emergency response with rapid on-site arrival
Heavy-duty tarping and temporary leak sealing
Storm damage documentation for insurance claims
Permanent repairs scheduled promptly after stabilization

Flat Roofing in Ontario

Flat roofing in Ontario demands materials and installation methods that withstand intense sun, thermal cycling, and occasional ponding. RoofPros California specializes in flat roof systems for commercial buildings, modern homes, and additions throughout the area. We install and repair TPO, modified bitumen, and built-up roofs with proper slope, insulation, and drainage. Our flat roofing Ontario solutions are engineered for longevity, energy efficiency, and minimal maintenance, keeping your property protected year-round.

Installation of TPO, modified bitumen, and built-up roofs

Promise

“TPO offers reflectivity and seam strength, ideal for Ontario's hot climate. Modified bitumen provides excellent waterproofing and durability. We help you select the best membrane based on building use, budget, and war…”

— Ontario customer

Choosing the Right Membrane +

TPO offers reflectivity and seam strength, ideal for Ontario's hot climate. Modified bitumen provides excellent waterproofing and durability. We help you select the best membrane based on building use, budget, and warranty goals. Each system is installed with reinforced seams and proper flashing details.

Drainage and Ponding Prevention +

Standing water is a flat roof's enemy. We design tapered insulation and install drains, scuppers, and gutters to ensure water flows off quickly. For Ontario properties, we also consider wind-driven rain and add extra protection at edges and penetrations to prevent leaks.

Maintenance for Longevity +

Regular maintenance extends flat roof life. We inspect seams, clear drains, and remove debris. For Ontario business owners, we offer maintenance plans that include annual inspections and minor repairs, preventing costly emergency work and preserving warranty coverage.

Installation of TPO, modified bitumen, and built-up roofs
Tapered insulation and drainage design to prevent ponding
Reinforced flashing at edges, vents, and penetrations
Annual maintenance plans with seam and drain inspection

Service · #9

Asphalt Shingle Roofing in Ontario

Asphalt shingle roofing in Ontario remains a popular choice for its affordability, durability, and wide range of styles. RoofPros California installs and repairs architectural and three-tab shingles that stand up to the region's heat and wind. We serve homeowners across Ontario, from established neighborhoods to new developments, using premium underlayments and proper ventilation. Our asphalt shingle roofing Ontario systems deliver reliable protection and curb appeal at a great value.

Benefits of Asphalt Shingles

Asphalt shingles offer excellent value, easy installation, and simple repairs. Modern architectural shingles mimic wood or slate at a fraction of the cost. In Ontario, reflective shingle options help reduce cooling loads. With proper installation, they can last 25 to 30 years.

Installation Best Practices

We start with a synthetic underlayment and ice-and-water shield at valleys and eaves. Shingles are fastened with corrosion-resistant nails at manufacturer-specified patterns. For Ontario's wind zones, we use enhanced nailing and sealant strips to prevent uplift. Ridge vents and intake vents ensure balanced attic ventilation.

Repair and Replacement Options

Damaged shingles can be replaced individually if the surrounding area is sound. For older roofs with widespread granule loss or curling, full replacement is more cost-effective. We provide honest assessments and color-matched shingles for seamless repairs, helping Ontario homeowners maintain their roof's appearance and performance.

Installation of architectural and three-tab asphalt shingles
Synthetic underlayment and ice-and-water shield at valleys
Enhanced fastening for high-wind zones in Ontario
Color-matched shingle repair for damaged areas

Metal Roofing in Ontario

Metal roofing in Ontario offers exceptional durability, energy efficiency, and modern style. RoofPros California installs standing seam, corrugated, and metal shingle systems that withstand extreme heat, wind, and fire. Homeowners in Ontario choose metal for its long lifespan and low maintenance. Our metal roofing Ontario installations include premium underlayments, precise flashing, and concealed fasteners for a clean look and leak-free performance.

01

Types of Metal Roofing

Standing seam panels provide clean lines and hidden fasteners, ideal for modern homes. Corrugated metal offers a rustic look at lower cost. Metal shingles mimic traditional materials with superior durability. We help Ontario homeowners choose the best profile and finish for their architecture and budget.
02

Energy Efficiency and Durability

Metal roofs reflect solar radiation, reducing attic heat and cooling costs. They resist fire, rot, and insects. In Ontario's climate, metal roofs handle thermal expansion well when installed with proper clips and fasteners. Many systems carry 50-year warranties, making them a smart long-term investment.
03

Installation and Weatherproofing

We install metal roofing over solid decking with high-temp underlayment. Fasteners are placed according to engineering specs for wind uplift. We pay special attention to valleys, ridges, and penetrations, using matched metal flashing and sealants to ensure a watertight roof that performs in Ontario's weather extremes.

Installation of standing seam, corrugated, and metal shingle roofs
High-temp underlayment and concealed fastener systems
Wind-rated fastening and precision flashing details
Energy-efficient reflective finishes to reduce cooling costs

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Service

Residential Roofing in Ontario, CA

Ontario is mostly a residential city, with a mix of older neighborhoods and newer developments. Homeowners here care about roofs that handle the heat and look good from the street. We work on everything from small bungalows near downtown to large two-story homes in Ontario Ranch. Whether you need a repair or a full replacement, we treat your home like our own. We show up on time, protect your landscaping, and clean up every nail.

Asphalt shingle roof replacement — Most Ontario homes have asphalt shingle roofs. We tear off the old layers, inspect the decking, and install new shingles with upgraded underlayment and ventilation. We use GAF, Owens Corning, and CertainTeed products. The job takes two to three days.
Roof leak repair and flashing — Leaks are common in Ontario after winter rains. We find the source with water testing and repair it with new flashing, pipe boots, and sealant. We also check your attic for moisture damage. Most repairs are done in one visit.
Roof inspection for real estate — If you are buying or selling a home in Ontario, a roof inspection gives you a clear picture of the roof's condition. We provide photos and a written report. This helps you negotiate or plan for future work.
Emergency roof repair — When a storm damages your roof, we respond 24/7. We tarp the roof to stop water intrusion and schedule the permanent repair. We serve all Ontario neighborhoods, from downtown to Ontario Ranch.

Commercial Roofing in Ontario, CA

Ontario has a large commercial and industrial base, with warehouses, distribution centers, and retail properties along the 10 and 60 freeways. These buildings often have flat or low-slope roofs that need specialized maintenance. We serve property managers, business owners, and facility directors across Ontario. If you need a commercial roof repair or replacement, we can work around your schedule to minimize disruption.

Warehouse and logisticsRetail and shopping centersOffice buildingsRestaurants and food serviceIndustrial manufacturing

Common Roofing Problems in Ontario

Ontario's climate and building stock create a specific set of roofing problems. The intense summer heat, winter rain, and occasional high winds all take a toll. Here are the issues we see most often when we are called for roof repair in Ontario.

Sun damage drying out shingles and sealants

Ontario gets months of 95-degree-plus days. That heat bakes shingles from above and below, drying out the asphalt and causing sealant to crack. Roofs here age faster than in coastal cities.

Leaks from failed pipe boots and flashing

The rubber boots around plumbing vents dry out and crack in the heat. When winter rain comes, water runs through the cracks and into your attic. It is one of the most common leaks we fix.

Wind damage lifting shingles and ridge caps

Santa Ana winds funnel through the Inland Empire and can hit 40 to 60 mph. They get under shingle edges and rip them off, especially on roofs with poor fastening or old shingles.

Poor attic ventilation causing premature roof failure

Many Ontario homes were built with minimal attic ventilation. Hot air gets trapped and cooks the underside of the roof deck, which shortens shingle life and can cause moisture problems in winter.

Signs You Need Roofing Work in Ontario

Ontario roofs give you warning signs before they fail completely. If you know what to look for, you can catch problems early and save money. Here are the most common signs we see when homeowners call us for roof repair in Ontario.

Shingles curling or losing granules

Heat and age cause shingles to curl at the edges and shed granules. Once granules are gone, the asphalt underneath dries out and cracks. This is a sign your roof is near the end of its life and needs replacement, not just repair.
Ceiling stains or brown spots

A stain on your ceiling means water is getting in somewhere. It could be a simple flashing issue or a larger problem. Do not wait, because mold and rot can develop quickly in Ontario's warm attics. Call for a leak inspection.
Missing or displaced shingles after wind

Santa Ana winds can lift shingles and tear them off. Even a few missing shingles expose the underlayment to sun and rain. We can replace individual shingles if the rest of the roof is in good shape.
Cracked or rusted flashing

Flashing around chimneys, vents, and valleys takes a beating from heat and rain. Cracked flashing is a common leak source in Ontario. We replace it with new metal and seal it properly.
Daylight visible in the attic

If you can see daylight through your roof boards, you have a gap that lets water and pests in. This often happens after storms or when shingles fail. It needs immediate attention to prevent damage.

Roofing Pricing in Ontario: What to Expect

Roofing prices in Ontario depend on the size, pitch, and material of your roof, plus the condition of the decking underneath. For 2026, a typical asphalt shingle replacement on a 1,500-square-foot ranch home runs $9,000 to $15,000. A tile or metal roof can run two to three times that. Repairs are much less: most leak fixes and flashing repairs fall between $250 and $800. If you need a full tear-off with new decking, expect to pay more. We give you a written estimate with line items so you know where the money goes. No hidden fees.

Basic Service

$89 starting · per visit

Diagnostic visit
Written estimate
Same-day scheduling
30-day warranty

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Navigating Ontario: Landmarks We Use

Ontario is a big city with distinct areas, and we use major landmarks to orient our crews and route our trucks. Knowing the landmarks helps us get to your address faster and avoid the worst traffic on the 10 and 60 freeways. Here are a few of the places we use as reference points.

Ontario International Airport

The airport anchors the south side of the city and helps us orient for addresses near Airport Drive and the surrounding industrial and residential areas.

Ontario Mills

Ontario Mills is a major shopping destination off the 10 freeway. We use it as a reference for addresses in the eastern part of the city and the surrounding commercial district.

Ontario Convention Center

The convention center is a downtown landmark near the 60 freeway. It helps us locate addresses in the central and southern parts of Ontario.

Cucamonga-Guasti Regional Park

This park sits near the border with Rancho Cucamonga and helps us navigate the northwest corner of Ontario and nearby residential streets.

Coverage across Ontario & San Bernardino County

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Plus surrounding San Bernardino County neighborhoods, with same-day routing on most appointments.

How Seasons Affect Roofing in Ontario

Ontario has a Mediterranean climate with hot, dry summers and mild, wet winters. That pattern drives roofing demand and maintenance needs throughout the year. Here is what to expect each season if you own a home in Ontario.

Spring

Spring is a good time to inspect your roof after winter rains. Look for missing shingles, cracked flashing, and any signs of leaks. The weather is mild, which makes it a comfortable time for repairs or replacements.

Tip: Schedule a roof inspection in spring to catch winter damage before summer heat makes it worse. We can also clean gutters and check attic ventilation.

Summer

Summer heat is hard on roofs. Attic temperatures soar, and shingles can blister or crack. This is also the season when we see the most wear on flat roofs and sealants. It is a good time for maintenance, but replacement work is hot and requires early starts.

Tip: If you are planning a replacement, consider scheduling it for early summer before the worst heat. Keep an eye on your attic temperature and ventilation.

Fall

Fall is the best time for roof replacement in Ontario. The weather is mild, and you get the new roof in place before winter rains. It is also when we start getting calls about leaks from the first storms. Leaves can clog valleys and gutters, so keep them clear.

Tip: Book your replacement in early fall to avoid the rainy season. Clear leaves and debris from your roof and gutters before the first big storm.

Winter

Winter brings rain, not snow, to Ontario. The rain finds every weak spot in your roof, especially old flashing and pipe boots. We get a lot of leak calls during and after storms. If you have an active leak, call us for emergency service.

Tip: Before winter, have us check your flashing and pipe boots. If a leak starts, do not wait. Call for emergency repair to prevent ceiling and insulation damage.

Nearby Cities We Serve from Ontario

Ontario sits in the middle of the Inland Empire, and we serve surrounding cities as part of our regular coverage area. If you are in one of these nearby communities, we can get to you from our Ontario base. Here are a few of the cities we cover.

(City)

Canoga Park

Canoga Park is about an hour west via the 101 and 118. We serve it as part of our greater Los Angeles coverage.

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(City)

Chatsworth

Chatsworth is northwest of Ontario, roughly 50 miles. We handle roofing there when customers need our Inland Empire crews.

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(City)

Encino

Encino is in the San Fernando Valley, about 55 miles west. We serve it for larger projects and scheduled work.

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(City)

Granada Hills

Granada Hills is northwest of Ontario, about 50 miles. We cover it as part of our regional service area.

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(City)

Harbor City

Harbor City is near the port, about 50 miles southwest. We serve it for commercial and residential roofing.

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(City)

Los Angeles

Los Angeles is west of Ontario, roughly 35 miles. We handle roofing across the metro area from our Ontario base.

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FAQs About Roofing in Ontario

Real answers from our team for the questions we hear most often before a job starts.

Talk to a real pro: (877) 409-4846

How much does a roof replacement cost in Ontario, CA?

Most asphalt shingle replacements in Ontario run $9,000 to $15,000 for a typical 1,500-square-foot home in 2026. Tile and metal roofs cost more. The final price depends on roof size, pitch, material, and whether we find damaged decking. We give you a written estimate with line items before we start.

How long does a roof replacement take in Ontario?

A standard asphalt shingle replacement on an average Ontario home takes two to three days. Larger homes or complex roofs can take four to five days. We start early in summer to avoid the heat. We also clean up all debris and haul it away before we leave.

Do I need a permit to replace my roof in Ontario?

Yes, most roof replacements in Ontario require a permit from the city. The permit ensures the work meets California Building Code and Title 24 energy standards. We handle the permit process for you and schedule the inspection. If a contractor tells you a permit is not needed, be cautious.

What are the signs I need roof repair in Ontario?

Common signs include ceiling stains, missing shingles, cracked flashing, and granules in your gutters. In Ontario, heat and wind damage are the leading causes. If you see any of these, call for an inspection. Small repairs now can prevent a full replacement later.

How often should I get my roof inspected in Ontario?

We recommend an inspection every year, ideally in spring after the rainy season. Ontario's heat and wind are hard on roofs, so annual checks catch problems early. If your roof is over 15 years old, consider an inspection every six months. We offer maintenance plans that include regular visits.

Get a Free Roofing Estimate in Ontario

If your roof is showing its age or you have a leak, do not wait. We offer free estimates for roofing in Ontario and can usually schedule an inspection within 24 hours. Our team is licensed, insured, and local. We will give you a straight answer and a fair price. Call us today at (877) 409-4846 or fill out our online form.

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Get Your Free Roof Estimate

Call (877) 409-4846 or send us a message and we will schedule a free inspection at your property. Same-day estimates are common if you reach us before noon. Emergency leak calls are answered 24 hours a day, every day of the year.

Call (877) 409-4846

RoofPros California

Phone
(877) 409-4846
Address

California
Hours

Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available