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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Owens Corning Roof Replacement in Ventura: What to Know First
An Owens Corning roof replacement in Ventura typically runs $11,500 to $24,000 depending on the shingle line you choose and the condition of your roof deck. Most full replacements take 2 to 4 working days once materials land, though tear-off on older Ventura homes near the pier can add a day when we find decking that’s been soaking in coastal moisture for decades. We’re an independent Owens Corning service provider, which means we can recommend the right Owens Corning system for your house without a corporate script. Call (559) 249-4917 and we’ll give you a written price before a single shingle comes off.
This page is for Ventura homeowners who already have Owens Corning shingles and need a straight answer on replacement: what fails, what it costs, what to watch for, and how we do the job differently. Dylan Pace and the Crestview Roofing Co Ventura crew have replaced Owens Corning roofs across Midtown, the Avenues, east end, and the hills above Ventura College. We know which Owens Corning lines hold up in this climate and which ones fight you the whole way.
How Owens Corning Products Fail – and How We Fix Them
- Duration Series granule loss and balding. The Duration line (and older Duration Premium Cool) uses SureNail fabric, but after 15 to 20 years in Ventura’s UV, we see the granule layer wear unevenly on southern exposures. The shingle loses its ceramic coating, the asphalt underneath bakes, and the mat starts telegraphing through. The fix isn’t a patch: it’s a full replacement with a new Owens Corning system rated for coastal sun, or a switch to a comparable GAF or CertainTeed line if your priorities shifted. We’ll tell you exactly what’s failing before you spend a dollar.
- Oakridge series curling at the eaves. Oakridge shingles curl first at the drip edge because that’s where attic heat and moisture push hardest in Ventura’s marine layer mornings. Once the tabs lift, wind-driven rain gets under them and the underlayment starts doing the roof’s job. By the time most homeowners call us, the underlayment is saturated and the first row of decking is soft. We replace the affected decking, reflash the eave, and re-roof with a line that breathes properly.
- Supreme and Classic series sealant failure along the coast. We see older 3-tab Supreme and Classic shingles lose their adhesive bond within a mile of the water. Salt air, constant temperature swings, and wind push the self-seal strip past its life. One good Santa Ana and the tabs start flapping. On those homes, replacement is almost always the smarter play than resealing: once sealant fails on a coastal roof, it fails everywhere.
- Flashings that were never re-engineered when the roof was. This isn’t Owens Corning’s fault, but it shows up on Owens Corning replacements all over Ventura. A previous roofer installed quality shingles but reused the old chimney flashing or step flashing. The shingles finally age out and the flashings are already gone. We cut out and replace all metal transitions during a re-roof, and we photograph every penetration before we cover it. If it’s not in writing, it’s not a promise.
- Improper venting that cooks Owens Corning shingles from underneath. In older Ventura tract homes with low-slope additions or enclosed soffits, we find Owens Corning shingles that look 10 years older than their age on the north slope. The cause is trapped attic heat from inadequate ridge and soffit venting. Before we lay a new Owens Corning roof, we calculate ventilation requirements for your actual attic volume and fix the airflow. That’s the difference between a roof that makes it 20 years and one that gives up at 12.
Styles & brands we work with






Our Owens Corning Roof Replacement Process
- 1
You call, a person answers. No voicemail loop. A live person takes your information 24/7 and books a site visit. You’ll get a trackable arrival time for Dylan or a lead tech.
- 2
We inspect the roof and the deck. We walk the entire surface, document granule loss, flashing condition, decking integrity, and attic ventilation. Photos are part of the record, not an upsell. We look for the failure modes above by name so you know what we’re seeing.
- 3
We write the price before work starts. You get a written scope of work with the exact Owens Corning line specified, the ventilation plan, the decking repair allowance, the dumpster and haul-away, and the final number. No verbal estimate. No “we’ll figure it out on the job.”
- 4
We tear off, repair, and reflash. The old Owens Corning roof comes off to the deck. We replace any rotted decking, install new underlayment per Owens Corning specs, reflash every penetration with new metal, and correct ventilation before the shingles go down.
- 5
We install the new system and document everything. Before-and-after photos of the deck, the flashings, the underlayment, and the finished roof are sent to you by text. You see exactly what was done under the shingles.
- 6
We walk the job with you and hand you the guarantee. You get a written 365-Day Done Right Promise covering the workmanship for a full year. If anything fails, we come back at no charge. The invoice comes by text. The number on the invoice matches the number on the written price.
See the difference
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AfterWhat Owens Corning Roof Replacement Costs in Ventura
Here’s what we see across Ventura for full Owens Corning roof replacements:
- 1,200 to 1,600 sq ft home, Oakridge series: $11,500 to $16,000
- 1,600 to 2,200 sq ft home, Duration series: $14,000 to $20,000
- 2,200 to 3,000 sq ft home, Duration Designer or Cool series: $18,500 to $26,000
- Major decking replacement (more than 30% of the deck): add $2,500 to $6,000 depending on how deep the rot goes
- Flat or low-slope section needing Owens Corning modified bitumen or a hybrid system: add $3,000 to $8,000
What moves the number: number of roof planes, pitch (steep means safety equipment and slower work), decking condition, chimney and skylight count, and whether you’re in a hillside area where material handling costs are higher. A 1940s pier-adjacent bungalow with three layers of old roof and a termite-eaten deck is a different job than a 2010 tract home in east Ventura. Call (559) 249-4917 and we’ll give you a written price for your actual house. Estimates are free.
Why Ventura Homeowners Call Crestview Roofing Co Ventura for Owens Corning Work
We put every Owens Corning replacement in writing before a single shingle is ordered. The price you see is the price you pay, no change orders hiding in the contract. Our techs are background-checked and uniformed, so the person at your door on Ventura’s east end or up in the hills is the person we told you was coming, with a trackable arrival time. We’ve been doing this since 2000, and we carry the full 365-Day Done Right Promise on every Owens Corning job: if our workmanship fails within a year, we fix it free, including a free second visit. And if Owens Corning turns out not to be the right line for your roof’s pitch or your budget, we also install GAF and CertainTeed systems, so you’re not locked into one brand because that’s all the roofer stocks. Dylan Pace has been working Ventura County roofs for years, from flat re-roofs in Midtown to full tear-offs near the pier, and his crew knows which Owens Corning lines earn their price here.
FAQs
No. Owens Corning shingle warranties cover manufacturing defects in the materials, and a properly installed replacement roof by a licensed contractor does not void that material warranty. What it can affect is any separate workmanship warranty from the previous installer, which typically ends the moment that roofer’s work is removed. We document every step of our replacement so you have a clear chain of evidence if you ever need to file a material claim. Call (559) 249-4917 and we’ll walk through your specific warranty situation.
You need replacement when the granule loss is widespread across multiple slopes, when shingles are curling or cracking in more than a few isolated spots, or when you’re seeing water stains on ceilings and the underlayment is compromised. A repair makes sense when the damage is localized to one flashing point or a small impact zone. We won’t sell you a roof if a repair does the job. We also won’t patch a failing roof and call it fixed. Call (559) 249-4917 for an honest inspection and a written quote either way.
Most full replacements take 2 to 4 working days once materials are delivered. Coastal homes with significant decking rot or steep hillside access can add a day or two. We give you a written timeline before work begins, and you get before-and-after photos by text so you can see exactly what got done each day. Call (559) 249-4917 and we’ll give you a realistic schedule for your specific roof.
For most Ventura homes, Duration with SureNail fabric is the strongest balance of wind resistance and granule retention in our coastal climate. If your HOA or design preference calls for a heavier architectural look, Duration Designer or Woodcrest gives you the thicker profile. For tighter budgets on flatter suburban lots, Oakridge performs well when ventilation is corrected at the same time. We’ll show you three options at three price points and explain the trade-off of each before you choose. Call (559) 249-4917 for a free estimate and a written comparison.
Yes. We pull the permit as part of the written scope of work, and we schedule the inspection after the job is complete. Permits are always line-items in our written price, never a surprise on the back end. If the inspector flags something, we correct it and handle the re-inspection at no charge. Call (559) 249-4917 to schedule your free estimate.
Have questions about your Owens Corning roof? Call (559) 249-4917 and a live person will answer. We’ll get you a written price, a straight timeline, and a roof that’s done right, documented, and guaranteed.
Written by Dylan Pace, Owner, Crestview Roofing Co Ventura at Crestview Roofing Co Ventura, serving Ventura and nearby areas.