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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 Willowbrook, CA | Van Nuys Roofing Co
We provide independent CertainTeed roofing service across Willowbrook, from Landmark shingle replacement on the main house to Flintlastic membrane repair on low-slope rear additions. The thing that makes our CertainTeed work different here is simple: almost every job in the 90059 grid involves two roof systems tied together decades ago with tar, and we know how both of them fail. Call (866) 321-6172 for a free estimate.
Why Willowbrook Residents Choose Us for CertainTeed Service
Most roofers in Willowbrook know one brand. Maybe two. We work with seven: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That matters when you own a CertainTeed roof, because we’re not stretching a limited product line to fit your house. We’re matching the right CertainTeed shingle, underlayment, and flashing to how your specific roof was built and how it has aged. Rick Dominguez learned the trade at Los Angeles Valley College and spent the better part of two decades on Valley rooftops before starting this operation. His rule is simple: “If it doesn’t need replacing, I’m not going to tell you it does.” We inspect first, recommend second. That means an honest assessment of your CertainTeed roof before any repair or replacement spend. If you’re weighing options in Willowbrook, CertainTeed sales & service is what we do every week. No brand steering, no supplier incentives. Your roof, your material choice.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Willowbrook
- Granule loss and curling on Landmark shingles. West-facing slopes in Willowbrook catch intense afternoon sun for years on end. We regularly see CertainTeed Landmark shingles with bare asphalt showing and edges curling upward after 15 to 20 years, especially where attic ventilation is weak. That Granule loss isn’t cosmetic. It means the shingle’s UV protection is gone.
- Cracked XT 25 three-tab shingles on rear additions. The low-slope additions behind many Willowbrook homes were tied into the main roof with tar instead of proper underlayment. CertainTeed XT 25 shingles on those pitches crack at the sealant strips and along the eaves because water sits longer and heat concentrates there.
- Nail pops and shingle distortion over original skip sheathing. 1940s through 1960s stucco homes in Willowbrook often still have their original skip sheathing. Decades of heat cycling cupped and delaminated those boards. Patriot shingles installed over them show nail pops and distortion that you can’t fix by re-nailing alone.
- Flintlastic membrane failures at seams and flashings. Flat rear-addition roofs that were originally tar-and-gravel and later covered with CertainTeed Flintlastic fail where the membrane meets the main house wall. Those seam failures leak into the same interior spaces as main-roof problems, which sends homeowners looking at the wrong roof.
- Flashing deterioration at the main-roof-to-addition tie-in. The point where a flat addition roof meets the pitched main roof is the weakest joint on most Willowbrook homes. Original flashing there corroded or separated years ago, and tar patches over it buy a season or two at best.
CertainTeed Service in Willowbrook: What Local Conditions Mean for Your Equipment
Most roofs on the 90059 grid are original to mid-century stucco-and-gable homes, and the rear additions added later often tie low-slope roofs into the main house with tar alone. That single fact shapes every CertainTeed leak call in Willowbrook. We’re never looking at one roof. We’re looking at two systems that were never designed to work together. On a 1950s stucco-and-gable home near Willowbrook Avenue and 120th Street, we found CertainTeed Landmark shingles on the main roof curled and missing granules, while the rear addition’s flat roof had failed seams patched with tar. The homeowner had been chasing the leak for two rainy seasons. We replaced the Landmark field shingles with new CertainTeed Landmark in a matching color, installed a proper Flintlastic membrane on the addition, and rebuilt the tie-in flashing. That leak hasn’t returned. The lesson holds across Willowbrook: if you have a CertainTeed shingle roof on the main house and a low-slope or flat roof on the back, every leak assessment has to account for both. Most roofers won’t tell you that. We will.
CertainTeed Models & Products We Service in Willowbrook
We service the CertainTeed product lines most common on Willowbrook homes: Landmark architectural shingles, XT 25 three-tab shingles, Patriot shingles, and Flintlastic low-slope membrane. For repairs, we source genuine CertainTeed shingles and accessories when available to match your existing color and profile. We won’t hesitate to use aftermarket underlayments and flashings that meet or exceed OEM specs when they perform better for the climate. We stock common Landmark colors and Flintlastic repair materials locally for faster turnaround in Willowbrook. If your CertainTeed roof is under 15 years old with isolated damage, we’ll repair it. If granule loss or curling covers more than 30% of the roof surface, we’ll tell you replacement is the smarter spend. That’s the straight answer, every time. Our team also handles CertainTeed work across the wider region, including Willowbrook service area calls that come from surrounding blocks. For a full picture of what we cover, see CertainTeed service in East Pasadena and CertainTeed service in Cudahy.
See the difference
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AfterCertainTeed Service Pricing in Willowbrook
CertainTeed work in Willowbrook is costed by the job, not by a price sheet. Here’s what drives the number:
- Shingle replacement (isolated damage): $350 to $900 per repair area, depending on slope access and how many shingles need matching.
- Flashing repair or replacement at a single penetration: $250 to $600, including sealant and new metal where needed.
- Flat roof patch (Flintlastic membrane repair): $400 to $1,100 for seam and flashing repairs on a typical rear addition, based on square footage and how far the damage runs.
- Full CertainTeed Landmark replacement on a standard Willowbrook home: $9,500 to $18,000, shaped by roof complexity, tear-off disposal, decking condition, and whether the addition’s low-slope membrane gets repaired at the same time.
Every estimate includes a written line-item quote before work starts. No change orders mid-job. If you’re weighing repair versus replacement, call (866) 321-6172 and we’ll walk the roof with you.
Serving Willowbrook, CA — Our Local Coverage Area
We’re based in the Willowbrook 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 – CertainTeed Roofing in Willowbrook
Yes. We source genuine CertainTeed Landmark shingles in the color and profile your roof already has, and we check for lot-run variations before installing. Over time, UV exposure shifts shingle color slightly, but a proper match is almost always achievable on Willowbrook homes. Call (866) 321-6172 and we’ll check your existing shingle against current supplier stock.
The patch is usually addressing the visible crack, not the seam failure or flashing separation at the main-house tie-in. On Willowbrook homes, the original tar-and-gravel roof under the Flintlastic was often never properly secured at that transition, so water keeps finding the same path in. A lasting fix means stripping back to the failing seam, installing new membrane lapped correctly, and rebuilding the perimeter flashing. For an exact assessment of your addition roof, call (866) 321-6172.
If you see cracks at the sealant strips or along the eaves on multiple shingles, and the surface feels brittle to the touch, the shingles are past the repair window. By the time XT 25 three-tabs on a low-slope Willowbrook rear addition show visible cracking, the asphalt’s plasticizers have broken down. Replacing individual shingles at that stage just shifts the failure point. We’ll tell you plainly whether repair still makes sense.
We repair them when the pitch and condition allow it, but on many Willowbrook rear additions the slope is too shallow for shingles to perform long-term, especially with the heat buildup they get. In those cases we recommend transitioning the addition roof to a Flintlastic membrane or another low-slope system rather than re-shingling. We’ll show you the numbers both ways and let you decide.
Fifteen to twenty years is realistic for CertainTeed Landmark in Willowbrook. Intense inland South LA sun on west-facing slopes, combined with weak attic ventilation on most mid-century homes, accelerates granule loss and curling beyond what cooler coastal areas see. Well-ventilated roofs with lighter shingle colors can push past twenty years. We can assess where your roof sits on that timeline during an inspection.
Service Areas Near Willowbrook
We serve Willowbrook and the surrounding South LA communities, plus our home base in Van Nuys and the wider San Fernando Valley. That includes Van Nuys, Valley Glen, Sherman Oaks, Encino, Studio City, and North Hills. If you’re near the 90059 grid and need CertainTeed work, we’ll send a crew that knows the local housing stock.
Book Your CertainTeed Service in Willowbrook Today
If your CertainTeed roof is showing its age, or you have a rear addition roof that won’t stop leaking, we’ll give you a straight answer about what it needs. Call (866) 321-6172 to schedule a free estimate. We inspect first, recommend second, and never sell you a roof you don’t need.
Written by Rick Dominguez, Owner at Van Nuys Roofing Co, serving Willowbrook and the San Fernando Valley.