Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
CertainTeed Roofing in Westmont, CA | Orange County Roofing Co
We service and repair CertainTeed roofs across Westmont, including Landmark architectural shingles, XT 25 and XT 30 3-tab fields, Presidential Shake, and Flintlastic low-slope membrane. What makes our CertainTeed work here different is straightforward: Westmont is unincorporated Los Angeles County territory, which means permits and inspections run through the county system, not the City of LA. That distinction trips up plenty of crews working the same block from the other side of Western Avenue. We’ve spent years on the shallow-pitch 1950s and 60s roofs here, tracing leaks back to the perimeters and penetrations rather than the shingle field. If your CertainTeed roof is giving you trouble, call (866) 942-4187 and we’ll take a look.
Why Westmont Residents Choose Us for CertainTeed Service
We’re an independent our CertainTeed services provider. No manufacturer badge, no authorization letter on the wall. Our credibility comes from knowing the specific mid-century roof assemblies found throughout Westmont: original 3-tab fields, hot-mopped built-up low-slope sections, and the flashing details that fail between them. We’ve been tearing into these roofs long enough to know that the shingle field usually isn’t the problem, even when the leak shows up inside the house. That’s why our inspections start at the perimeter and the penetrations, then work inward.
Kurt Hensley, our owner, grew up in Serrano Heights watching tile crews work the hillside homes, and he’s carried that same curiosity through two decades of roofing across Southern California. He’s the one who’ll walk your roof with you, point at a failed base flashing, and say, “A roof shouldn’t be a mystery, let’s just look at what you’ve got and go from there.” We carry full lines of CertainTeed-matched field shingles and accessories, but we’re also one of the few independent crews that’ll tell you when a perimeter repair will buy you years instead of selling you a tear-off you don’t need.
From leak repair to full replacement to standalone inspections, one call covers it. We service all of Westmont, 90047, and the surrounding county pockets, including CertainTeed service in View Park-Windsor Hills.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Westmont
These are the failure modes we see most often on CertainTeed roofs in Westmont. Notice a pattern: the shingle field is usually the last thing to fail.
- Failed base flashing at the perimeter on low-slope roofs. On the hot-mopped built-up sections so common to 1950s Westmont homes, the perimeter flashing deteriorates long before the shingle field over the main house. Ponding water and UV open the seams, then winter rain pushes in. The fix is rebuilding the flashing, not replacing shingles.
- Leaks around swamp cooler and vent penetrations. The original penetrations on these shallow-pitch roofs were flashed, patched, and re-patched over decades. The transitions fail first under chronic marine-layer moisture. We remove the old patchwork, rebuild the penetration with proper flashing, and tie it into the field cleanly.
- Granule loss and algae streaking on shaded north-facing shingle courses. Westmont’s coastal fog holds damp against the north slope. CertainTeed 3-tab and architectural shingles in shaded valleys lose granules and streak years before the sun-exposed south slope shows wear. This is a moisture problem, not a manufacturing defect.
- Wind-driven rain wicking under brittle, sealant-stripped tabs. Original low-pitch shingle fields laid over minimal underlayment start showing sealant failure by year 15 to 20. Once the tabs are brittle and stripped, wind-driven rain moves under courses that never fully sealed in the first place.
- Transition leaks where patched built-up sections tie into shingle fields. On Westmont’s small duplexes and tract homes, flat sections were patched repeatedly and tied into shingle fields where the original flashing was never stepped correctly. After the first real winter rain, that transition is exactly where we trace the leak.
CertainTeed Service in Westmont: What Local Conditions Mean for Your Roof
Here’s the thing about Westmont that no generic roofing page will tell you: the neighborhood is an unincorporated Los Angeles County island surrounded by the City of Los Angeles. That’s not a trivia point. It changes the entire permit and inspection path on a re-roof. A CertainTeed job on the Westmont side of Western Avenue pulls county permits and county inspectors. One block over, on the city side, the same job moves through the LA Department of Building and Safety. Crews used to the city counter get tripped up on the county path constantly, and a missed inspection reschedule can leave a torn-off roof exposed to weather for days. We know the county process, we schedule around it, and we don’t let the paperwork slow down the actual roofing.
Westmont’s housing was built out in the 1950s and 60s for workers drawn to the post-war industrial corridor. The typical home here is a single-story stucco tract house or a small duplex with a low-slope or very shallow gable roof. The original roofing was 3-tab asphalt shingles or built-up tar-and-gravel, and a lot of it is now at or past end of life. The South Bay’s marine layer and winter rain mean chronic moisture and UV are the real enemies, not snow load. Flat and low-pitch roofs pond water, and the seams and penetrations deteriorate long before any steep-slope roof would show wear. When we inspect a CertainTeed roof in Westmont, we’re looking at the low-slope sections first, because that’s where the next leak is already forming.
CertainTeed Models & Products We Service in Westmont
Our CertainTeed sales & service covers the full range homeowners actually have on their roofs in this area:
- CertainTeed Landmark architectural shingles: the most common residential line we see, sometimes original but often a re-roof from the 2000s or 2010s.
- CertainTeed XT 25 and XT 30 3-tab shingles: original to many 1950s and 60s Westmont tract homes. We match profile and color for repairs that blend.
- CertainTeed Presidential Shake luxury shingles: less common here but present on some upgraded homes.
- CertainTeed Flintlastic low-slope membrane: the right product for flat and shallow-pitch sections, including the transitions where built-up and shingle fields meet.
We stock common CertainTeed profiles and colors locally for fast turnaround, and we match field shingles and accessories to the existing roof so repairs stay coherent. When you need underlayment or flashing, we use quality roll goods rather than the cheapest stock on the shelf, because the failure points on Westmont roofs are exactly the places where cheap materials get exposed first.
See the difference
Before
After
Before
After
Before
AfterCertainTeed Service Pricing in Westmont
CertainTeed roofing service in Westmont lands in a predictable range. A leak repair or flashing rebuild typically runs $350 to $1,200 depending on how much perimeter work is needed. A low-slope Flintlastic patch on a ponding section, tied into the shingle field, runs $800 to $2,500. A full CertainTeed re-roof on a typical 1,100 to 1,500 square foot Westmont tract home runs $9,500 to $18,000 depending on the product line, deck condition, and how much low-slope membrane work is involved. We don’t quote over the phone without looking at the roof. The free estimate includes a written line-item breakdown, so you can see exactly where the money goes. Call (866) 942-4187 and we’ll put eyes on it.
Serving Westmont, CA — Our Local Coverage Area
We’re based in the Westmont area and know this community well, and we also handle CertainTeed in West Athens. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Westmont
You need a Los Angeles County permit for roofing work in Westmont because the community is unincorporated county territory, not part of the City of Los Angeles. The county building department handles permitting and inspection. One block over on the city side of Western Avenue the rules reverse, and that’s a distinction that matters for scheduling and code compliance.
Probably not. The shingle field usually outlasts the penetrations on these shallow-pitch Westmont roofs. The leaks you’re seeing after winter rain are almost certainly failed flashing around the vent or swamp cooler penetrations, where ponding and UV have opened the seams. We rebuild the penetration flashing rather than tearing off shingles that are still doing their job, just as we do with CertainTeed service in Inglewood. Call (866) 942-4187 if you want an inspection that focuses on the actual leak source before any work gets quoted.
Yes. This is one of the most common jobs we do in Westmont, especially on the 1950s homes with flat garage roofs or porch sections tied into a shallow gable. We rebuild the perimeter, tie Flintlastic membrane at the flat-to-shallow-gable transition, and step the flashing so water moves off the right way. The key is doing it under a county permit and making sure the transition flashing is actually correct, because that’s the spot where most patch jobs fail again within two seasons.
We look at the deck, the underlayment, and the condition of the sealant strips before making that call. If the tabs are brittle and stripped, the underlayment is shot, or the deck has begun delaminating from decades of marine-layer moisture, a patch won’t buy you much. If the field is sound and the problem is perimeter flashing or a penetration, a targeted repair is the right call. It comes down to what we find when we open the problem area. Call (866) 942-4187 and we’ll give you an honest read on repair versus replace.
Yes. Chronic moisture on the north-facing and shaded courses breaks down the granule adhesion faster than UV alone. The streaking and granule loss you’re seeing in the valleys is a moisture-driven failure, and it’s common on older CertainTeed 3-tab and architectural fields in Westmont where morning fog lingers. The fix depends on how far the granule loss has progressed. Give us a call at (866) 942-4187 and we’ll tell you what’s recoverable.
Service Areas Near Westmont
In addition to Westmont service area coverage, we handle CertainTeed work in nearby communities including Gardena, Hawthorne, Inglewood, Compton, and the unincorporated county pockets around Athens and Willowbrook. For homeowners just north of Westmont, see our CertainTeed service in Gardena page. For those east toward downtown, we also provide CertainTeed service in Silver Lake.
Book Your CertainTeed Service in Westmont Today
Call (866) 942-4187 to schedule your free estimate in Westmont. We’ll inspect the roof, explain what’s actually failing, and give you a written line-item quote for the repair or replacement. No pressure, no charge for the estimate.
Written by Kurt Hensley, Owner at Orange County Roofing Co, serving Westmont and greater Southern California.