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Owens Corning Roof Inspection in San Jose: What to Know First
An Owens Corning roof inspection in San Jose costs $195 to $450 for a full assessment, and most inspections are completed in 90 minutes to two hours with a written report in hand the same day. We’re an independent Owens Corning service provider, not a manufacturer affiliate, which means our findings are driven by what’s actually on your roof rather than a sales script. The inspection covers every Owens Corning layer: shingle condition, underlayment, flashing, ventilation, and the specific wear patterns these roofs develop in the South Bay climate.
This page is written for Owens Corning owners in San Jose who want a straight answer about what’s happening above their ceiling. If you’re seeing granules in your gutters, curling shingle edges, or dark streaks spreading across the roof plane, call (669) 238-2101 and we’ll schedule the inspection.
Key Takeaways
- Inspection cost: $195 – $450 depending on roof size, pitch, and accessibility
- Most common Owens Corning issue in San Jose: accelerated granule loss on Duration shingles from intense UV exposure and hot, dry summers
- Warranty-safe approach: we document everything photographically, which supports a manufacturer claim if one applies
- Parts policy: OEM Owens Corning components when available; quality aftermarket for discontinued lines
- Every inspection ends with a written price for any recommended work, before anything starts
Styles & brands we work with






How Owens Corning Products Fail – and How We Fix Them
Owens Corning shingles fail differently than other brands. Knowing the difference is exactly why you hire an inspector who has spent years looking at these specific products. Here are the failure modes we see most often on San Jose roofs.
- Duration Series granule shedding. Duration shingles use a thicker granule layer than many competitors, but San Jose’s long dry season bakes the asphalt and loosens the bond. Homeowners notice granules collecting in gutters or staining walkways. We fix this by identifying whether the shedding is cosmetic or structural. If the shingle mat is intact, cleaning and resealing works. If the asphalt is exposed in patches, section replacement is the honest answer.
- Oakridge Series curling at the eaves. Oakridge shingles, common on homes built in the 1990s and early 2000s across Willow Glen and Campbell, tend to curl at the roof edges first. This happens when attic ventilation is inadequate and heat backs up under the decking. We inspect the intake and exhaust balance, not just the shingles. Fixing the curl without fixing the ventilation means it returns in two years.
- Berkshire and Woodmoor ridgeline cracking. The heavier architectural lines hold up well on flat planes but crack along ridgelines because that’s where the shingle is bent over the peak and exposed to the most direct sun. We inspect ridge caps separately from the field and replace cracked caps before water finds the nail line underneath.
- Supreme 3-tab sealant strip failure. On older homes with Supreme or Supreme AR shingles, the adhesive strip loses grip after 15 to 20 years. Wind lifting is the symptom. We test sealant adhesion at multiple points across the roof, not just the easy-to-reach spots. If sections are lifting but the shingle itself is sound, re-sealing is the fix. If the mat is crumbling, it’s time to talk replacement.
- VentSure and edge flashing incompatibility. We regularly find Owens Corning roofing where the shingles are fine but the non-Owens flashing at valleys, chimneys, and skylights is failing. Flashing aluminum breaks down at different rates than shingle, especially with San Jose’s wet-dry seasonal swings. We replace flashing with materials matched to the remaining shingle life so you’re not paying for a 30-year metal piece on a roof with 8 years left.
Our Owens Corning Roof Inspection Process
Every Owens Corning inspection follows the same sequence, which we call The Garrison Code internally. It’s written, it’s repeatable, and it doesn’t change based on how busy we are.
- 1
Call and schedule. You talk to a live person at (669) 238-2101, not a voicemail. We give you a two-hour arrival window and the tech shows up inside it, in uniform, with identification.
- 2
Walk-around and interior check. Before anyone touches the roof, we walk the perimeter and check the attic if accessible. Water stains, decking condition, and vent placement tell us where to focus on the roof itself.
- 3
On-roof inspection. We inspect shingle condition section by section, test sealant bonds, check flashing, drip edge, and underlayment exposure, and photograph everything. Owens Corning warranty claims succeed or fail on documentation, so we document thoroughly.
- 4
Parts and repair decision. If repairs are needed, we calculate the real options: OEM Owens Corning components where they’re available, and quality aftermarket parts where a line has been discontinued. You get both options in writing.
- 5
Repair or replacement work. If you approve, the work is done on the spot when possible, with the written price already in your hand before anything starts. No price moves at the door.
- 6
Post-repair test and report. Every repair is water-tested where applicable, photographed again, and documented. You get a written report of what we found, what we did, and what the guarantee covers.
See the difference
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AfterWhat Owens Corning Roof Inspection Costs in San Jose
Inspection pricing is straightforward because we believe you should know the number before you commit. A standard single-story Owens Corning roof inspection in San Jose with a written report runs $195 to $295. Two-story homes and steep-pitch roofs run $250 to $450 because access takes longer and safe setup matters more. If your roof has known issues like active leaks or storm damage, we may recommend a more involved diagnostic, and we’ll tell you that before we begin.
What moves the price: roof size, pitch, story count, and whether you’re asking for a warranty-claim documentation package. If we find repair work that we recommend, you get the price on paper before anything starts. The inspection itself converts to a free estimate on any resulting work. Call (669) 238-2101 to schedule and we’ll confirm an exact number for your roof.
Why San Jose Homeowners Call Brennan Roofing Co San Jose for Owens Corning Work
Travis Oakley learned roofing at Los Angeles Trade-Technical College before deciding roofs were going to be his livelihood, not just a summer job. He and the crew have been working the South Bay for years, handling everything from straightforward re-roofs to full tear-offs on older Craftsman homes near The Alameda. Owens Corning roofs are a regular part of that work, but so are GAF and CertainTeed and a half dozen other lines. That breadth matters because it means we’re not married to one manufacturer’s answer.
Every Brennan Roofing Co San Jose inspection runs on the same standard. Written price before any work starts. Background-checked, uniformed technicians on every call. A one-year written guarantee on every repair we do, with a free return visit if something fails. Phones answered by a live person around the clock. We operate under The Garrison Standard because it’s the only way we know to make letting a stranger onto your roof feel like a decision you don’t have to second-guess. Tell me what you’re seeing and I’ll tell you what it actually means.
FAQs
No. An inspection by any qualified roofer does not void an Owens Corning warranty. We document everything photographically and provide written findings, which actually strengthens a warranty claim if you need to file one with the manufacturer.
We typically schedule inspections within three to five business days, and the inspection itself takes 90 minutes to two hours. If you’re seeing active water intrusion, tell the dispatcher when you call (669) 238-2101 and we’ll prioritize your address.
When the product line is still manufactured, yes, we source OEM Owens Corning components. For discontinued lines like older Supreme colors, we source quality aftermarket materials and tell you exactly what we’re using and why before any work starts.
The honest answer depends on shingle age, decking condition, and how much of the roof is failing. If repairs will cost more than 50 percent of a section replacement and the shingles are past 20 years old, we’ll tell you replacement is the smarter money. You get both numbers in writing and the decision stays yours.
Yes. We provide photographic documentation, written findings, and a condition report you can submit directly to Owens Corning. Some manufacturers ask for specific inspection formatting, and we’ll match that format so your claim isn’t bounced for paperwork reasons.
Schedule Your Owens Corning Roof Inspection in San Jose
You don’t need to guess what’s happening on your roof. One inspection gives you a written condition report, a clear repair plan if repairs are needed, and a price on paper before anything starts. Call (669) 238-2101 and talk to a live person who can schedule your Owens Corning roof inspection in San Jose today.
Written by Travis Oakley, Owner, Brennan Roofing Co – San Jose, CA at Brennan Roofing Co San Jose, serving San Jose and nearby areas.