Metal roofing
Architectural shingles
Tile roofing
GAF
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Owens Corning Roofing in Thousand Oaks, CA | Mercer Roofing Co Thousand Oaks
We’re Mercer Roofing Co Thousand Oaks, and we provide independent Owens Corning roofing service across Thousand Oaks, CA. If you need Owens Corning shingle replacement, flashing repair, or tile underlayment work, call (805) 309-3314. What makes our Owens Corning work different here is straightforward: we know how Santa Ana wind corridors and HOA tile mandates in Thousand Oaks put specific stress on Owens Corning roofs, and we plan every repair around that reality. For Owens Corning sales & service expertise paired with local knowledge, you’re in the right place.
Why Thousand Oaks Residents Choose Us for Owens Corning Service
Most roofing crews in Ventura County can nail down a shingle. Far fewer understand how an Owens Corning TruDefinition Duration roof behaves on a south-facing Thousand Oaks slope after fifteen summers of UV exposure. That’s the difference. Grant Whitlock, owner at our Roofing Company - Thousand Oaks, trained through the construction technology program at Los Angeles Trade-Technical College, where he learned to read a roof deck the way a doctor reads an X-ray, slowly and without guessing. He’s been on Thousand Oaks roofs long enough to know which Owens Corning failure modes show up on which streets, and he shows homeowners exactly what he found before anything gets touched.
We send every technician’s name and photo before the visit. They arrive in a clean, marked uniform and present a photo ID badge at the door. Every repair gets a written price before work starts, and every repair includes a written 365-Day Done Right Promise. If it’s not right within a year, we make it right.
Styles & brands we work with
Common Owens Corning Roofing Problems We Solve in Thousand Oaks
- Granule loss on Oakridge shingles. South-facing slopes in Thousand Oaks take relentless summer sun, and Oakridge shingles from the 2000s often shed granules faster than expected. Bare patches mean the asphalt is exposed, which accelerates cracking and leak risk. We inspect the full slope and recommend either targeted patching or full slope replacement depending on how far the degradation has gone.
- Wind uplift on Duration shingles with SureNail strip. In Newbury Park, Santa Ana winds funnel through the canyons and hit certain streets hard. Duration shingles rely on that SureNail fabric strip to hold the nail line under load, but if the original installer sailed nails too high or too deep, the tabs lift and tear. We fix the nail pattern, not just the shingle.
- Cracked sealant strips leading to shingle blow-off. Where winds whip through Lang Ranch ridgelines, the thermal cycling breaks down the sealant bond between shingle courses. Once a tab lets go, the next gust peels shingles and exposes underlayment. We re-secure the affected area and check adjacent courses so the next wind event doesn’t repeat the damage.
- Improperly installed hip and ridge caps. A lot of Thousand Oaks roofs have non-Owens Corning caps on Owens Corning field shingles, a shortcut from the original build. Ridge caps take the most wind abuse, and when they fail, moisture creeps along the roofline. We replace with correct Owens Corning ridge product and proper fastening.
- Tile-to-shingle conversion mistakes. We see this often in Thousand Oaks: someone replaces a concrete tile roof with Owens Corning composition shingles but skips the transition flashing at walls, chimneys, or tile valleys that stay in place. Those transitions leak first. We correct them properly.
Owens Corning Service in Thousand Oaks: What Local Conditions Mean for Your Equipment
Thousand Oaks has a high concentration of HOAs that mandate exact concrete tile profiles, especially in gated communities like Lang Ranch and Woodridge. So when an Owens Corning composition roof is allowed, it’s often a retrofit on an older home where the original tile underlayment has already been replaced. We frequently correct misguided tile-to-shingle conversions by reinstalling proper flashing and decking as part of our Roof Repair - Thousand Oaks service. Here’s what that means in practice: the original tile profile dictated the flashing height at walls and chimneys. When the tile comes off and composition shingles go down, that flashing is suddenly too short or too tall, and water finds the gap within a year or two. We see this on specific streets in Thousand Oaks where the 1980s tract homes have cycled through multiple roofing systems. If you’ve got an Owens Corning roof that was installed over a retired tile system, call us. The transition points are where we spend most of our correction work.
Owens Corning Models & Products We Service in Thousand Oaks
We work on the full Owens Corning shingle lineup: Oakridge, TruDefinition Duration, Duration Flex, and Berkshire. For replacements and patches, we use genuine Owens Corning shingles and accessories when matching existing product lines. For underlayment, flashing, and ventilation, we select top-tier aftermarket components that meet or exceed code for Ventura County’s climate. That’s not a shortcut, it’s a deliberate choice: the best underlayment for a Thousand Oaks roof isn’t always the one with the same label on the wrapper. We stock common Owens Corning colors locally so a wind-damage repair doesn’t wait on a distributor delivery from Los Angeles.
See the difference
Before
After
Before
After
Before
AfterOwens Corning Service Pricing in Thousand Oaks
Repair pricing on Owens Corning roofs in Thousand Oaks depends on what actually failed. Small shingle patches run $350 to $800 depending on slope height and the number of shingles. Flashing repairs at chimneys or walls typically run $450 to $1,200. Tile underlayment replacement on a Thousand Oaks home runs $4.50 to $7.50 per square foot depending on the tile profile, decking condition, and whether we’re replacing a valley or a full slope. Full Owens Corning shingle replacement on a typical Thousand Oaks single-story runs $14,000 to $22,000; two-story homes run higher. Every project starts with a written estimate that doesn’t change on install day. Call (805) 309-3314 and we’ll schedule a free estimate with a specific price, not a range.
Serving Thousand Oaks, CA - Our Local Coverage Area
We’re based in the Thousand Oaks 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 – Owens Corning Roofing in Thousand Oaks
Yes, you can replace individual broken tiles over an Owens Corning underlayment. We re-secure the replacement tiles to match the surrounding profile and fastening pattern. But if the underlayment itself is near the end of its service life, patch repairs buy time, not permanence. On many Thousand Oaks homes, the original felt is now 25-plus years old and is the real leak source, not the tiles above it. Call (805) 309-3314 for a free inspection and we’ll tell you which situation you’re in.
It’s usually slope orientation and shade. South-facing and west-facing slopes in Thousand Oaks absorb far more UV than north-facing slopes, and that breaks down the asphalt binder holding the granules. Your neighbor’s roof may face the same direction but get afternoon shade from a mature oak. Once granule loss reaches the point where bare asphalt shows in patches, the shingle is degrading and should be replaced before it cracks through. We’ll tell you honestly whether you need a patch or a full slope.
Not always. Many Lang Ranch HOAs mandate exact concrete tile profiles, and a composition shingle roof may not be approved unless the original roofing was shingle or the HOA has granted a variance. Before you commit to Owens Corning shingles, get the HOA’s current roofing policy in writing. We’ve worked on Lang Ranch homes where shingle conversions were approved for rear slopes only, with tile retained on street-facing elevations. We’ll work with your HOA’s specs once they’re confirmed.
We can patch Terra Cotta Owens Corning shingles, and the color will blend closely but not invisibly. Owens Corning runs batch variations even within the same color name, and sun exposure fades the roof at a different rate than a newly manufactured shingle. We work from your existing shingles’ actual color, not just the color name, and we can pull shingles from less visible slopes to make the repair area blend better. Call (805) 309-3314 for an exact quote on the patch.
Duration Flex is designed for steep pitches and high-wind areas, which is why it’s common on Thousand Oaks homes in windy corridors. But the same flexibility that helps it hug a steep deck can work against it during sustained Santa Ana gusts if the nail placement is off by even half an inch. The shingle flexes more under load, which stresses the sealant strip and the nails. On Newbury Park canyon streets, we see Duration Flex tabs peeled upward in a way standard Duration shingles don’t fail. The fix is often a corrected fastening pattern, not a weaker shingle. If you’re seeing lifted tabs after a wind event, call (805) 309-3314 before the next one.
Service Areas Near Thousand Oaks
We provide Thousand Oaks service area coverage across neighborhoods including Newbury Park, Lang Ranch, Woodridge, and the Conejo Valley. We also serve Owens Corning service in Camarillo and Owens Corning service in Moorpark, plus parts of Westlake Village, Oak Park, and Malibu for larger Owens Corning projects.
Book Your Owens Corning Service in Thousand Oaks Today
A roof should protect you quietly, if you’re thinking about it, something’s wrong. Call (805) 309-3314 and we’ll schedule your free Owens Corning estimate. We answer with a live person, 24/7.
Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Thousand Oaks since 2000.