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 Northridge, CA | Van Nuys Roofing Co
We provide independent CertainTeed roofing service across Northridge, from leak repairs on Landmark shingles to full underlayment replacement under original concrete tile. The one thing that separates our CertainTeed work here from anywhere else is simple: we know why roofs in Northridge fail at the underlayment layer 25 to 30 years after the 1994 earthquake, and we fix it without selling you new tile you don’t need. If you own a CertainTeed roof in 91324, 91325, 91327, or 91330, call (866) 321-6172 for a straight assessment.
Why Northridge Residents Choose Us for CertainTeed Service
Our crews have spent years tearing into CertainTeed systems across the San Fernando Valley, not just installing them but diagnosing how their shingles, tile underlayments, and accessory components fail under real Northridge conditions. We work on CertainTeed roofs every week and know their product lines well enough to tell you honestly when a repair makes sense and when the setup itself is the problem. Rick Dominguez, our owner, grew up off Sepulveda Boulevard and learned the trade through the construction technology program at Los Angeles Valley College over in Valley Glen. He’s been on San Fernando Valley rooftops for the better part of two decades, and he built this company around one rule: if it doesn’t need replacing, we’re not going to tell you it does. That’s not a slogan. That’s how we quote jobs in Northridge.
We’re not a CertainTeed dealer pushing one brand. We’re a material-neutral shop that works across seven major manufacturers, GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, so our CertainTeed recommendations are driven by what your roof actually needs, not by supplier incentives. For Northridge homeowners weighing repair versus replacement, that matters. We inspect first, recommend second, and the answer is always yours to make. See our CertainTeed sales & service coverage for the full picture.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Northridge
CertainTeed makes solid products, but Northridge has a way of finding their weak points. Here’s what we see most:
- Baked-out Landmark and Xton shingles. On west- and south-facing slopes in Northridge, valley sun beats on asphalt shingles until the sealant strips re-adhere and the granule layer wears thin years ahead of the nominal warranty. We see 15-year-old Landmark roofs on Devonshire Street-adjacent tracts that look 25. When the granule loss is surface-level, we repair. When the shingles are bald on the sun slopes, replacement is the honest answer.
- Brittle underlayment under intact tile. This is the big one in Northridge. Concrete tile roofs re-laid after the 1994 earthquake often reused the original tile over fresh CertainTeed underlayment. Thirty years later, the tile still looks fine and the membrane underneath has turned brittle and cracked. We replace the underlayment run by run and re-lay the original tile, which saves thousands versus a full re-roof.
- Flashing failures around chimneys and valleys. Northridge’s hot-day, cool-night temperature swings work fasteners and sealant loose over time. On CertainTeed shingle roofs, the flashing details at chimneys, valleys, and wall transitions are usually the first thing to go. We see it constantly in the 1950s and 1960s ranch tracts throughout 91325.
- Seam leaks at quake-patched sections. Where CertainTeed underlayment met older material after the 1994 re-lay, the transitions create seams and laps that pond or tear during winter rain. These leaks are notoriously hard to trace because they only show after heavy rain and the water travels far from the actual breach.
- Granule-clogged valleys and gutters. CertainTeed shingles shedding granules on sun-exposed slopes pile up in valley channels. In Northridge’s dry season, that grit bakes into a crust. When the first winter rain hits, water backs up under the shingle course above the valley. Regular valley cleaning is cheap insurance, especially on homes built in the 1960s with original valley metal.
CertainTeed Service in Northridge: What Local Conditions Mean for Your Equipment
Northridge is the epicenter of the 1994 earthquake, and its roofing trade is still shaped by that event. Thousands of tile roofs were re-laid or repaired after the quake, and many of those repairs are now 30 years old. So roofers here routinely deal with a second generation of seismic-related failures, slipped tiles and deteriorated underlayment from patched areas, that don’t exist in neighboring cities like Granada Hills, CertainTeed in North Hills, or Reseda that saw less intense shaking. Here’s the specific CertainTeed problem: after 1994, contractors stripped the tile, inspected it, and re-laid the good pieces over new CertainTeed underlayment, Rapid Ridge, DiamondDeck, or RoofRunner depending on the job. Today, in 91324 and 91325, we routinely find that original tile still intact while the CertainTeed membrane beneath it has gone brittle and cracked along the old re-lay seams. In a 1960s ranch tract off Reseda Boulevard in 91325, a homeowner called about a ceiling stain that only showed after winter rain. Our tech pulled a section of original concrete tile and found it perfect, but the CertainTeed underlayment beneath had gone brittle and cracked along a seam from the 1994 re-lay. We replaced the failed underlayment run, re-laid the original tile, and the leak stopped. No new tile needed. That pattern is uniquely common in Northridge precisely because of the quake repair boom.
CertainTeed Models & Products We Service in Northridge
We work on the full CertainTeed residential lineup. That includes Landmark architectural shingles, the Xton line, Presidential Shake and Presidential TL, and the concrete tile underlayment systems we mentioned: Rapid Ridge, DiamondDeck, and RoofRunner. For accessory components, ridge vent, starter strip, hip-and-ridge, and matching underlayments, we match the CertainTeed field product already on the roof whenever it still makes sense to do so. Where a genuine CertainTeed part adds nothing but cost, we’ll tell you that too and use a quality aftermarket equivalent. We stock common CertainTeed-compatible accessories for fast turnaround on Northridge repairs, but the honest answer is that most jobs need a quick material run, and we price that in from the start.
See the difference
Before
After
Before
After
Before
AfterCertainTeed Service Pricing in Northridge
CertainTeed repair pricing in Northridge varies by what’s actually wrong, but here’s a straight breakdown of what drives the cost:
- Tile underlayment replacement: $4.50 – $8.00 per square foot, depending on roof pitch, accessibility, and how much tile needs to be re-laid.
- Shingle leak repair: $250 – $600 for typical flashing or sealant work on Landmark and Xton roofs.
- Valley and flashing repair: $350 – $900 when we need to pull and re-set shingles around a failed detail.
- Full architectural shingle replacement: $5.50 – $9.00 per square foot for CertainTeed Landmark, installed and permitted.
What drives the cost in Northridge specifically is the condition of what’s underneath. A 1960s tract home that still has its original 1994-era underlayment will cost more to fix properly than a roof that was fully re-done in the last decade because the brittle membrane tears the moment you lift tile off it. That’s the honest variable. Every estimate we give in Northridge includes a written, line-item quote for free, so you’ll see exactly where the money goes before any work starts. Call (866) 321-6172 to schedule yours.
Serving Northridge, CA — Our Local Coverage Area
We’re based in the Northridge 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 Northridge
The tile is probably fine. The underlayment beneath it is the problem. On post-1994 re-lay roofs in Northridge, the original concrete tile was reused over new CertainTeed underlayment, and that membrane is now 25 to 30 years old, brittle, and cracked at the seams. The tile sheds most of the water, but once the underlayment fails, winter rain finds its way through. Call (866) 321-6172 and we’ll pull a few tiles to confirm before recommending anything.
Landmark is a solid shingle, but no asphalt shingle loves a southwest-facing roof in Northridge. The valley sun bakes shingles on those exposures hard, and we see Landmark lose granules and sealant faster there than on north slopes. We’ll recommend Landmark if the budget fits and the roof has proper ventilation, but we’ll also tell you honestly if another CertainTeed line or a different material altogether makes more sense for your specific exposure. That’s the benefit of being brand-agnostic. Call (866) 321-6172 for a straight answer.
Yes, and that’s exactly what we do in most of Northridge. We lift the tile, remove the failed CertainTeed underlayment, install new membrane, and re-lay the original tile. If the tile is intact and only the underlayment has failed, which is the common post-1994 pattern here, there’s no reason to buy a new roof. Call (866) 321-6172 for an estimate on underlayment replacement.
We handle both, and we’ll tell you which one your roof actually needs. In 91324, we regularly repair CertainTeed shingle leaks around chimneys, valleys, and wall flashing, especially on homes where the hot-day, cool-night cycle has worked the sealant loose. If the shingle field itself is gone, granule-bald on the sun slopes, we’ll tell you replacement is the honest answer. But we won’t sell you a roof you don’t need. Call (866) 321-6172 and we’ll inspect first.
Because Northridge was the epicenter of the 1994 earthquake. Thousands of tile roofs here were re-laid after the quake, which meant new underlayment, often CertainTeed, went down under reused original tile. Those membranes are now 30 years old and failing. CertainTeed in Encino, Granada Hills and Reseda saw less intense shaking, so far fewer roofs got that same post-quake re-lay treatment. The failure pattern is a quake-repair signature unique to Northridge. Call (866) 321-6172 and we’ll come take a look at yours.
Service Areas Near Northridge
Our CertainTeed service covers all of Northridge, 91330, 91324, 91325, and 91327, and reaches into the surrounding San Fernando Valley. We also serve Van Nuys, Valley Glen, Sherman Oaks, Encino, Studio City, and North Hills. If you’re next door in CertainTeed service in Universal City or CertainTeed service in San Fernando, we likely cover your address too. Full details are on our Northridge service area page.
Book Your CertainTeed Service in Northridge Today
If your CertainTeed roof is leaking, losing granules, or just aging past the point of trust, call (866) 321-6172. We’ll inspect it first, tell you what’s actually wrong, and give you a free written estimate. Repair or replace, we’ll tell you which one makes sense.
Written by Rick Dominguez, Owner at Van Nuys Roofing Co, serving CertainTeed in Valley Glen, Northridge and the San Fernando Valley.