Metal roofing
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Roof Replacement in Irwindale: What It Costs and What the Job Actually Entails
Roof replacement in Irwindale typically runs $12,000 – $28,000 for a full tear-off on a mid-century single-family home, with flat and low-slope commercial work scaling significantly higher based on square footage and membrane system. Most residential jobs in the 91722 zip code take 3 – 7 days once materials land. The bigger variable in Irwindale isn’t shingle choice; it’s whether the existing roof was ever built to handle the Santa Ana wind exposure and the quarry grit that packs into every drainage path.
Irwindale sits in a strange spot for roofing. The residential streets off Irwindale Avenue and Arrow Highway are mostly older mid-century homes with pitched shingle roofs. But drive two blocks toward the gravel pits or the MillerCoors facility and you’re looking at thousands of square feet of flat commercial membrane. We do both. Our Roof Replacement crew handles residential tear-offs, new decking, and shingle systems on those older streets, and we quote flat and low-slope commercial work with the same documentation standards. If you’re in Irwindale and not sure whether your roof needs replacement or has another five years, call (866) 942-4187 and we’ll tell you straight.
Why Homeowners and Building Owners in Irwindale Call Us
Kurt Hensley started Orange County Roofing Co with a simple rule: stock enough competing brands that nobody has to lie about which shingle is “best.” We carry GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That’s seven major manufacturers. It means when we recommend a product for your Irwindale roof, the recommendation comes from your wind zone, your roof pitch, your budget, and your warranty preference. Not from a distributor incentive.
Irwindale is a small city. Reputation travels fast here, especially among the warehouse managers and building owners who talk to each other about which contractor actually showed up when the winter rain exposed a scupper failure. We’ve earned repeat work in this city by documenting what we install. Nailing patterns. Underlayment schedule. Decking condition before we cover it. That paper trail matters when an insurance adjuster asks whether the roof met wind-load spec. We also inspect roofs as a standalone service. If you’re buying or selling a property in 91722 and the roof’s condition is an open question, our inspection tells you exactly what the roof needs. Nothing more.
Styles & brands we work with
Asphalt Shingle Roof Replacement in Irwindale
Asphalt shingle roof replacement in Irwindale is the standard residential job on the mid-century homes that line the older streets off Arrow Highway and Irwindale Avenue. These homes were built when three-tab shingles were the default, and most now carry a second layer or an aging architectural profile that’s lost granule coverage. A full tear-off on a typical 1,200 – 1,600 square foot home in 91722 runs $12,000 – $20,000 depending on decking condition and whether we’re reconfiguring ventilation.
The job starts with stripping everything to the decking. We don’t nail new shingles over old ones, and we don’t cover decking we haven’t inspected. Rot and delamination at the sheathing are common on these older Irwindale homes, especially where clogged valleys held moisture against the fascia for years.
Decking and Underlayment First
We replace any compromised decking before anything else goes down. Then we lay a full underlayment schedule. In Irwindale’s wind exposure, we use ice and water shield through valleys, around penetrations, and along the eaves. That’s not an upsell. It’s the difference between a roof that survives a Santa Ana event and one that leaks at the first winter storm because wind-driven rain got under the shingle laps.
Ventilation and Ridge Work
Most of the mid-century homes in this city are under-ventilated. We often replace passive box vents with a continuous ridge vent while we’re up there. Better airflow extends the life of the new shingles, and it’s cheaper to do during a replacement than to retrofit later.
New Roof Installation in Irwindale
New roof installation in Irwindale applies to two situations: new construction on the rare residential lot being developed, and full recladding of the flat and low-slope commercial buildings that dominate the city’s industrial core. For new residential construction, a new roof installation on a typical home in 91722 runs $18,000 – $28,000 including decking, underlayment, shingles, flashing, and ventilation. Commercial membrane work is quoted per square and depends heavily on the membrane system specified.
If you’re building new, you have one chance to get the roof assembly right. Retrofitting ventilation or adding proper eave flashing after the fact is expensive and never as clean. We’d rather spend an hour reviewing your plans than have you pay for corrections later.
New Construction Documentation
We photograph the decking before underlayment, document the nailing pattern against the shingle manufacturer’s wind-rating spec, and hand you the full record at closeout. That file is what your insurer wants to see, and it’s what a future buyer’s inspector will ask for.
Flat and Low-Slope Systems
Irwindale’s warehouse and quarry economy means much of the new roof installation work here is flat commercial. We quote TPO, PVC, and modified bitumen systems, and we pay special attention to drains, scuppers, and parapet flashing. A flat roof in this city fails at the drainage points first, not the field.
Trusted Brands We Service in Irwindale
We install Owens Corning, IKO, Atlas, and Tamko roof systems in Irwindale, alongside GAF, CertainTeed, and Boral. Because we carry all seven, we don’t have to steer you toward whichever brand gives us the best margin. Need a high wind-rated architectural shingle? We’ll quote Atlas or Owens Corning with the documentation to match. Want a specific color to match your mid-century exterior? Tamko and IKO both run lines that work well on Irvine-era homes. We keep local stock profiles for common Irwindale jobs, which shortens wait times when you decide to move on a quote.
See the difference
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After
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After
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AfterCommon Roof Replacement Problems We See in Irwindale Homes
- Quarry grit in the valleys. Windblown dust from the gravel pits settles into roof valleys and behind flashing. On the older homes off Irwindale Avenue, we regularly find valleys packed solid with grit. That grit holds water against shingles and fascia, and it’s why so many replacements here already have rot at the eaves before we even lift a shingle.
- Santa Ana wind damage at the rake edges. The wind-exposed slopes catch gusts that pull three-tab shingles loose. If the original install used four nails instead of six, the whole roof is compromised. We see this constantly on homes that got a cheap reroof in the 1990s.
- Flat-roof ponding on warehouse and commercial buildings. The big industrial roofs in Irwindale fail because drains and scuppers clog with quarry dust and debris. Ponding water sits on the membrane, accelerates UV degradation, and finds every seam. A replacement that doesn’t address drainage slope simply ponders again.
- Hidden decking rot under old shingles. A quote that promises “shingles only” without inspecting the decking is a red flag. We’ve pulled shingles off Irwindale homes and found sheathing so rotted you could push a screwdriver through it. Cover that with new shingles and you’ve voided the manufacturer’s wind warranty.
Pricing for Roof Replacement in Irwindale, CA
A residential asphalt shingle replacement in Irwindale runs $12,000 – $20,000 for a standard mid-century single-family home. Larger homes or those requiring full decking replacement can reach $28,000. New residential construction typically lands between $18,000 and $28,000. Flat commercial work in 91722 varies by membrane type and square footage; a 5,000 square foot TPO job commonly runs $35,000 – $55,000 depending on insulation, parapet work, and drainage reconfiguration.
What changes the number: decking condition, roof pitch, the number of penetrations, whether we’re replacing ventilation, and whether the job needs full documentation for an insurance claim or resale. We give written line-item quotes. No change orders on work we scoped correctly. Call (866) 942-4187 for a free estimate, and we’ll walk the roof with you.
We Also Serve Cities Near Irwindale
Our crews work throughout the San Gabriel Valley and into the Inland Empire. If you’re in Covina, Azusa, Citrus, or West Covina, we handle roof replacement with the same documentation standards and multi-brand material access. The same Kurt Hensley-led team covers all of these cities. Call (866) 942-4187 and tell us where you are.
Serving Irwindale, CA — Our Local Coverage Area
We’re based in the Irwindale 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 Irwindale
Most of Irwindale falls under a California exposure category that expects shingles to handle 90 – 110 mph uplift ratings, depending on the exact location and roof height. What actually earns that rating is not just the shingle. It’s the full assembly: six nails per shingle installed to the manufacturer’s pattern, a proper underlayment schedule, ice and water shield in valleys and at eaves, and decking that’s sound enough to hold fasteners. A cheap quote that skips the documented nailing pattern technically installs a wind-rated shingle without meeting the wind-rated standard. We document everything so the rating is real, not just advertised. Call (866) 942-4187 if you want to see what a compliant quote looks like line by line.
Quarry dust from Irwindale’s gravel pits blows onto roofs and packs into valleys, against fascia boards, and behind flashing. Over years, it traps moisture against wood and shingle edges, accelerating rot and creating drainage blockages that cause leaks the first time it rains. A replacement that ignores that debris history just covers the problem. We strip to decking, clear the drainage paths, and rebuild flashing so the new roof has a clean start. If you’re not sure whether your roof has grit damage, our inspection service will tell you exactly what’s happening.
A compliant Irwindale quote includes decking inspection and replacement as needed, full underlayment with ice and water shield at all critical points, manufacturer-spec nailing patterns, new flashing at every penetration, proper ventilation, and a documentation packet for warranty and insurance. A cheap quote usually covers shingles, basic felt, and labor, and it quietly assumes your decking is fine without looking. If a price seems too good, ask what’s been left out. Then call (866) 942-4187 and we’ll show you the difference.
We price residential and commercial jobs separately because they’re entirely different assemblies. Residential shingle work in 91722 is priced per square with line items for decking, underlayment, ventilation, and flashing. Flat commercial work is priced per square foot based on membrane type, insulation, parapet condition, and drainage reconfiguration. The one thing both share is that we document what we install. If you own or manage a warehouse or industrial building in Irwindale, call (866) 942-4187 and we’ll quote it properly, drains and all.
Yes, in most cases it helps. Insurers care whether the roof was installed to code and to the manufacturer’s wind-rating spec. When we document the nailing pattern, underlayment schedule, and decking replacement, you have the paper trail an adjuster requests after a wind event. Without it, you’re arguing a claim with no evidence. In Irwindale specifically, where Santa Ana winds are a known exposure, that documentation can make the difference between a claim being paid or denied. It’s one of the reasons we document every replacement we do. For more detail, call (866) 942-4187.
Written by Kurt Hensley, Owner at Orange County Roofing Co, serving Irwindale and the San Gabriel Valley with documented, multi-brand roof replacement since day one.