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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
CertainTeed Roofing in Westminster, CA | Orange County Roofing Co
CertainTeed repair in Huntington Beach and our Westminster service both mean one thing most of the time: full tear-off and replacement on aging ranch homes, and we handle that work from first inspection to final permit sign-off. We’re Orange County Roofing Co, an independent CertainTeed service provider, not an authorized or manufacturer-affiliated dealer, which means we recommend the right CertainTeed product for your Westminster home because it fits the roof, not because a brand contract says we have to. The defining step on nearly every CertainTeed re-roof in Westminster is reconciling decades of room additions, patio enclosures, and layered shingles before any new shingle goes down. Call (866) 942-4187 for a free estimate on your Westminster roof.
Why Westminster Residents Choose Us for CertainTeed Service
We’ve torn off and replaced CertainTeed shingle, tile, and low-slope systems across Westminster’s 1950s through 1970s tracts long enough to know how Landmark and Presidential assemblies actually behave under coastal-adjacent UV and Santa Ana wind. That’s different from knowing how they look in a catalog. Kurt Hensley, our owner, grew up in the Serrano Heights area of Orange and spent his summers watching crews work the tile roofs on the hillside homes before he ever picked up a nail gun. That early exposure turned into two decades of roofing across Orange County, and the takeaway is simple: a roof shouldn’t be a mystery, so let’s just look at what you’ve got and go from there.
When we show up at a Westminster home, we’re looking at the roof the way a CertainTeed specialist should, which means understanding which shingle line was originally installed, how the sealant strips have aged, and whether that flat section over the rear addition is tied into the field correctly. We stock CertainTeed-branded shingles, ridge caps, and underlayment for fast turnaround across 92683, 92684, and 92685, and when an OEM part isn’t the best piece for the job, we’ll say so and use a quality aftermarket flashing or vent boot that outperforms it. That’s the kind of straight answer that keeps Westminster homeowners calling us back.
You also get the whole roofing lifecycle from one team: CertainTeed sales & service, inspection, repair, and full replacement. You don’t have to vet one company for a leak patch and a different one for a tear-off. If you’re comparing options across brands, we carry seven major manufacturers, including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, so a material recommendation from us isn’t a one-brand pitch. The right product wins, not the one with the highest contractor margin.
Styles & brands we work with






Common CertainTeed Roofing Problems We Solve in Westminster
- Layered re-roofs baked brittle by Westminster sun. Many 1950s and 1960s ranch homes in Westminster still carry second and third shingle layers from prior re-roofs done over old CertainTeed three-tab. Decades of coastal UV beat those layers into granule loss and edge curl, and when Santa Ana winds hit, the exposed underlayer starts shedding. We tear down to deck and start clean rather than adding a fourth layer that the City of Westminster building department won’t allow anyway.
- Ridge cap and starter-strip lift on aged Landmark and three-tab roofs. The sealant strip on older CertainTeed shingles fails long before the field shingles move, so ridge caps and starter strips begin fluttering and tearing off in wind events that leave the rest of the roof looking fine. On Westminster homes we see this most often on the windward side facing the Santa Ana pattern, and the fix is replacing the ridge and starter assemblies before they peel further.
- Flashing failures at tied-in additions and patio enclosures. Westminster’s older Little Saigon tracts are full of room additions and enclosed patios built over the decades, which creates irregular roof planes and mismatched shingle layers where the original CertainTeed field meets a flat or low-slope section. Water finds those transitions at the first winter rain, which is how a small leak becomes a soft deck and dry rot in the ceiling below.
- Cooked-out underlayment and dry rot at valleys and penetrations. On a 50-plus-year-old Westminster roof, the original felt underlayment has long exceeded its life, and the decking beneath valleys, plumbing vents, and chimneys has often softened. We see this on virtually every tear-off we do in Westminster, and it’s why we re-sheet decks and replace underlayment rather than shingling over what’s already failed.
- Flat and low-slope sections over patios and garages. Many Westminster ranch homes have a flat or low-slope section over a patio addition or attached garage, often finished years ago with the wrong product. CertainTeed Flintlastic rolled and modified-bitumen systems are the right fix for those sections when they’re tied in correctly to the shingle field, and we handle that transition with new flashing so the winter rain stops getting in.
CertainTeed Service in Westminster: What Local Conditions Mean for Your Roof
If you own a home in the older tracts around Little Saigon, the odds are good that your roof isn’t a simple single-plane surface anymore. Westminster’s housing stock from the 1950s through the 1970s includes a lot of single-story and split-level stucco ranch homes that have had room additions and patio enclosures built on over the years. Before any CertainTeed re-roof on one of these homes, we have to reconcile irregular roof planes, tied-in flat sections, and mismatched shingle layers, and we have to pull permits through the City of Westminster building department, not the county. That reconcile-then-permit sequence is the defining step on almost every CertainTeed roof here, just as it is for our CertainTeed in Stanton projects, and it’s a step a lot of roofers skip until the inspector flags it mid-job. Our team doesn’t skip it. We walk the roof with you, identify every transition point, and build the scope so the new CertainTeed field ties into those sections correctly from day one, with the permit pulled before the first shingle comes off.
We had this exact situation on a 1960s single-story ranch off Bolsa Avenue in the Little Saigon core. The roof carried three layers of brittle certainTeed three-tab down to skip-conditioned decking. We re-sheeted it solid, laid a new CertainTeed Landmark architectural shingle field with fresh ridge caps and vent boots, and tied the rear patio addition’s flat section into the shingle field with new flashing so the winter-rain transition stopped leaking. The homeowner’s adult children sat in on the walkthrough, and we provided a bilingual English/Vietnamese estimate and scope, so the multi-generational decision got made in one conversation instead of three. That’s Westminster roofing – families deciding together, and a roof that needs its additions reconciled before it’s re-roofed.
CertainTeed Models & Products We Service in Westminster
We install and repair the full CertainTeed residential line that makes sense for Westminster’s housing stock. The CertainTeed Landmark architectural asphalt shingle is the workhorse replacement on Westminster ranch homes, and it’s the shingle we most often recommend when a homeowner wants a balance of lifespan, weight, and cost. For budget-conscious repairs and matching on older homes, we still service and install CertainTeed XT 25 and XT 30 three-tab shingles where the existing roof calls for them. CertainTeed Presidential Shake and Presidential TL lines give Westminster homeowners who want a heavier, high-definition look an upgrade path that still sits right on the same decking. And for the flat and low-slope sections over patios, additions, and garages we see all over Westminster, we use CertainTeed Flintlastic rolled and modified-bitumen systems tied into the shingle field with new flashing.
On parts, we use CertainTeed-branded shingles, ridge caps, and underlayment where the assembly calls for them, and we switch to quality aftermarket flashing and vent boots where those pieces outperform or outlast the OEM version. We’ll tell you which is which and why, because that’s the kind of transparency a Westminster homeowner should expect from a roofer.
See the difference
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AfterCertainTeed Service Pricing in Westminster
CertainTeed roofing service in Westminster is driven by the size of the roof, the number of layers we’re tearing off, and how much decking and flashing work the specific roof needs. A full CertainTeed tear-off and replacement on a typical Westminster ranch home most often falls in the $15,000 to $45,000 range depending on the shingle line you choose and the condition of the deck beneath. A targeted repair like a ridge cap replacement or flashing fix around a patio addition usually lands between $450 and $1,500. A flat section re-roof using CertainTeed Flintlastic over a patio or garage typically runs $2,500 to $8,000 depending on square footage and deck condition. Your free estimate includes a full walk-through of what we find, a line-item scope, and a material recommendation that fits the home, not a brand quota. Call (866) 942-4187 and we’ll schedule a time to get on your Westminster roof and give you an exact number.
Serving Westminster, CA — Our Local Coverage Area
We’re based in the Westminster area and know this community well, with our Garden Grove CertainTeed service and coverage throughout the region. Use the map below to see our full service coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Westminster
Yes. Re-roofing in Westminster requires a permit through the City of Westminster building department, not the county, and we pull that permit for you as part of the job. That includes the inspection passes at the required stages, so when we finish, your new CertainTeed roof is signed off and on record with the city. Call (866) 942-4187 if you want to talk through what the permit process looks like for your specific home.
We won’t. A third layer of shingles on top of two older layers is bad roofing practice, and in Westminster the building department won’t approve it anyway. The right move is a full tear-off to deck, because that lets us inspect the decking underneath, replace any dry-rotted sections, and install the Landmark field on a clean, solid surface rather than on top of an assembly that’s already failing. If you’re not sure what’s under your current shingles, schedule a free estimate and we’ll tell you what we find.
Yes. We serve a large Vietnamese-American homeowner base across Westminster, and many of our customers prefer to review estimates and scopes in both English and Vietnamese, especially when adult children are involved in the decision alongside their parents. We’ll provide a bilingual estimate at your request, so the whole family can review the scope in the language each person is most comfortable with. Call (866) 942-4187 to schedule the estimate and let us know how you’d like the paperwork.
We treat the transition between the flat section and the shingle field as one of the most important details on the roof. We’ll inspect how the original addition was tied in, replace any failed flashing, and use CertainTeed Flintlastic on the flat section while the shingle field gets Landmark or another CertainTeed line. The key is the flashing at the transition, which is where most leaks on Westminster additions originate. We’ll show you exactly how we plan to tie the two sections together before any work starts. Call (866) 942-4187 and we’ll get on the roof and map it out.
CertainTeed’s Landmark architectural shingles are designed for UV exposure and wind resistance appropriate for coastal Southern California, and they’re the line we recommend most often for Westminster ranch homes due to that balance. Presidential Shake and Presidential TL lines add heavier construction for those who want still more mass in wind-prone areas. The failure mode we see in Westminster most often isn’t the shingle itself, it’s the sealant strip aging out on old three-tab layers and allowing ridge caps and tabs to flutter in Santa Ana wind, which is a tear-off and re-install situation, not something a better shingle alone fixes. Call (866) 942-4187 for an exact recommendation on your home.
Service Areas Near Westminster
While we’re on roofs across the Westminster service area, we also serve neighboring communities across the region. If you’re nearby in Corona, Home Gardens, El Cerrito Corona, Norco, Eastvale, or Jurupa Valley, give us a call. We also provide CertainTeed service in Avocado Heights and CertainTeed service in Baldwin Park for homeowners in those areas.
Book Your CertainTeed Service in Westminster Today
If your Westminster roof is showing its age, or you just want a straight answer about what it needs, call (866) 942-4187 to schedule your free estimate, or ask about our Midway City CertainTeed service if you’re in that area. We’ll get on the roof, walk it with you, and give you a line-item scope and a material recommendation that fits the home. Same-week scheduling is available across 92683, 92684, and 92685.
Written by Kurt Hensley, Owner at Orange County Roofing Co, serving Westminster since day one of our operation.