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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 Northridge, CA | Marquis Roof Repair
We provide independent CertainTeed roofing service across Northridge, CA, specializing in Landmark architectural shingles, Presidential series, and tile underlayment systems. What makes our CertainTeed work different here is simple: Northridge sits on the 1994 earthquake epicenter, and we know how those post-quake repairs are failing now, decades later. Call (866) 705-2978 for a free estimate on any CertainTeed roof, whether it needs a targeted repair or a full replacement.
Why Northridge Residents Choose Us for CertainTeed Service
We work on CertainTeed service in Van Nuys and across the San Fernando Valley weekly, from Landmark architectural shingles to tile underlayment assemblies. That hands-on familiarity means we know how these products actually age under Northridge heat and seismic movement, not just how they look in a brochure. Ron Thibodeau, our owner, grew up in Magnolia Park and has spent more than two decades roofing across the Valley. He built Marquis Roof Repair on a simple principle: investigate before you recommend. If your CertainTeed roof can be repaired with the right parts, that’s what we’ll do. If the underlayment is shot, we’ll tell you straight instead of patching over a failing membrane.
We’re an independent CertainTeed service provider. Not authorized, sponsored, or endorsed by CertainTeed, and we say so plainly. What we bring is deeper: access to seven manufacturer lines, including CertainTeed, Owens Corning, GAF, IKO, Atlas, Tamko, and Boral. That breadth means our recommendation is driven by your roof, your climate, and your budget, never by which brand we happen to stock that week. For a full look at how we handle the brand, see our CertainTeed sales & service page.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Northridge
- Granule loss and thermal cracking on 1990s Landmark shingles. Northridge summers regularly top 100°F, and that heat bakes asphalt shingles hard. Landmark-series shingles installed during post-quake rebuilds are now 25 to 30 years old. The seal strips have failed, the granules are washing into gutters, and the shingles crack when walked on. This is end-of-life wear, and it shows up across whole neighborhoods at once.
- Brittle CertainTeed underlayment under re-laid tile. After the 1994 earthquake, many Northridge tile roofs were re-laid over their original underlayment rather than re-decked. CertainTeed RoofRunner or DiamondDeck membrane that was installed during those 1990s repairs is now brittle. It tears at tile re-lay instead of surviving it, which means a roof that looks fine from the curb is actually leaking underneath.
- Flashing and vent-boot failures from seismic settling. The earthquake shifted roof penetrations. Flashing around chimneys, vents, and valleys pulled open, and many repairs were quick patches rather than proper rebuilds. Water tracks under the shingle field and shows up as ceiling stains the following winter. We rebuild those flashing details so water stays out.
- Wind-lifted ridge and hip shingles. Santa Ana winds hit exposed Northridge ridgelines hard. CertainTeed shingles that were high-nailed pop their seal and curl at the rake long before the field shows wear. We replace lifted ridge and hip shingles with the correct OEM product and set the nails at the right depth.
- Valley flashing separation on tile roofs. On tile roofs near the epicenter, seismic settling pulled valley flashing apart. Water follows the gap under the tile and into the deck. We rebuild valley flashing with proper CertainTeed-compatible underlayment and new metal, then re-set the tile so the assembly holds.
CertainTeed Service in Northridge: What Local Conditions Mean for Your Roof
Northridge is the 1994 earthquake epicenter. That single fact shapes roofing work here more than any other variable. A large share of local tile roofs were re-laid over their original 1960s and 70s underlayment rather than re-decked after the quake. The CertainTeed membrane under those tiles is often original or 1990s vintage, and the roof reads newer from the street than it actually is. We see this constantly in the post-1994 neighborhoods around the epicenter. On a 1960s ranch house near the epicenter, our crew pulled a lifted barrel tile course and found CertainTeed RoofRunner underlayment laid during a 1990s post-quake repair, brittle and split straight across the valley. We replaced the underlayment across the affected slopes with new CertainTeed membrane, re-set the original barrel tile, and rebuilt the valley flashing that seismic settling had pulled open. The next round of winter rain stayed out of the living room ceiling. That’s the difference between a patch and a repair, and it’s exactly the kind of work Northridge roofs need right now.
CertainTeed Models & Products We Service in Northridge
We service the full CertainTeed residential lineup, including Landmark architectural shingles, Landmark Pro, Landmark Solaris, Presidential and Presidential Shake architectural shingles, and the Xtreme and WinterGuard waterproofing underlayment lines. We also replace CertainTeed tile underlayment systems like RoofRunner and DiamondDeck under clay and concrete tile. Our approach to parts is straightforward: we match CertainTeed OEM shingles, underlayment, and accessory flashing wherever the assembly is still serviceable. When an aftermarket underlayment genuinely outperforms on the actual deck, we use that instead and explain why. We stock the common CertainTeed profiles locally so CertainTeed in Valley Glen and Northridge repairs don’t wait on a warehouse order. That means faster turnaround when a ridge needs re-capping or a valley needs new membrane.
See the difference
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AfterCertainTeed Service Pricing in Northridge
CertainTeed service pricing in Northridge depends on what’s failing. Here’s what homeowners can expect for common jobs:
- A single ridge or hip shingle replacement runs $250 to $450, including material and labor.
- Flashing rebuild around a chimney or vent boot typically lands between $400 and $800, depending on how far the seismic settling opened things up.
- Tile underlayment replacement under an existing tile roof starts around $4 to $7 per square foot, which covers removing and re-setting the tile over new CertainTeed membrane.
- Full Landmark architectural shingle replacement on a standard Northridge ranch sits between $12,000 and $18,000, with Presidential lines running higher due to the heavier shingle. We provide written line-item quotes and fixed pricing. No change orders.
- Roof inspection with a written condition report is free.
A free estimate includes a full roof check, photos of what we find, and a straight answer on whether repair or replacement makes sense. Call (866) 705-2978 to schedule yours.
Serving Northridge, CA — Our Local Coverage Area
We’re based in the Northridge area and provide CertainTeed in North Hills and nearby communities. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Northridge
Because after the 1994 earthquake, many Northridge tile roofs were re-laid over their original underlayment instead of being re-decked. The tiles may have been re-set or replaced, but the membrane underneath stayed original or was patched with 1990s material. From the curb the roof looks fresh. Under the tile, the CertainTeed RoofRunner or DiamondDeck membrane is brittle and split. The only way to know is to pull a tile course and look. Call (866) 705-2978 and we’ll check yours for free.
Landmark shingles are rated for high-heat climates, but Northridge’s sustained triple-digit days accelerate thermal cracking on any asphalt shingle. The real issue is age. Landmark shingles installed during the 1990s post-quake rebuilds are now past their rated life. Newer Landmark and Landmark Pro shingles hold up well, provided the attic ventilation is adequate. We check ventilation as part of every inspection because a hot roof deck kills shingles from below.
Santa Ana winds hit Northridge ridgelines from a consistent angle, and they work ridge and hip shingles loose over time. If the shingles were high-nailed during installation, the seal strip never fully engaged, and wind lift pops them free. The fix is to re-cap the ridge with new CertainTeed shingles nailed at the correct depth, not to keep re-sealing the old ones. Call (866) 705-2978 for an exact quote.
Yes. We look for the specific failure patterns that show up in post-quake Northridge repairs: flashing that was patched instead of rebuilt, underlayment that was re-used when it should have been replaced, and valley details that were caulked rather than re-flashed. We document everything with photos and give you a straight assessment. The inspection is free, and if the repair is holding, we’ll tell you that too.
No. We are an independent CertainTeed service provider. We are not authorized, sponsored, or endorsed by CertainTeed. What we offer is hands-on experience: we work on CertainTeed in Encino and across the San Fernando Valley every week, and we install materials from seven manufacturers, not just one. That independence means our recommendation is based on what’s right for your roof, not on a brand contract.
Service Areas Near Northridge
In addition to Northridge, our crew works throughout the surrounding San Fernando Valley and nearby areas. If you’re in CertainTeed service in Ladera Heights, CertainTeed service in Burbank, Universal City, North Hollywood, or Studio City, we cover those communities too. For a full breakdown, see our Northridge service area page.
Book Your CertainTeed Service in Northridge Today
A roof done right the first time is the only version worth doing. If your CertainTeed roof is showing signs of age or you suspect the post-quake repairs are failing, call (866) 705-2978 to schedule a free estimate. We’ll inspect, explain what we find in plain terms, and give you a fixed written quote for the repair or replacement.
Written by Ron Thibodeau, Owner at Marquis Roof Repair, serving Northridge and the San Fernando Valley. From first inspection to final shingle, built to the Marquis standard.