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 Valley Glen, CA | Gable Roof Repair
We provide independent CertainTeed roofing service across Valley Glen, from full tear-offs to targeted repairs on Landmark, Presidential Shake, and clay tile systems. What makes our CertainTeed work different here is straightforward: we know this housing stock. Valley Glen’s 1920s-1950s bungalows and Spanish Colonials sit next to flat-roof additions and detached garages, and the way CertainTeed materials age on those mixed planes is something you only learn by working on them year after year. If your CertainTeed roof is leaking, lifting, or just looking tired, call (866) 650-8319 and we’ll tell you honestly whether it needs a repair or a replacement.
Why Valley Glen Residents Choose Us for CertainTeed Service
We’ve torn off, installed, and repaired CertainTeed shingles, tile, and metal across the San Fernando Valley — including CertainTeed repair in Sherman Oaks — long enough to know how their products actually behave under Valley Glen’s extreme heat, Santa Ana wind exposure, and mixed-material roof plains. We’re an independent CertainTeed service provider, not authorized or affiliated with the manufacturer. That independence matters. It means we’re not obligated to sell you a CertainTeed product if a different material makes more sense for your roof. It also means our recommendation is based on what we see on the roof deck, not a brand rep’s talking points.
Neil Drummond, owner of Gable Roof Repair, grew up watching older Southern California houses show their age – peeling fascia, sagging soffits, shingles that had clearly given up. He learned roofing fundamentals alongside framing and waterproofing at Saddleback College’s construction technology program, and he’s spent the better part of three decades finding the real source of leaks rather than patching the obvious spot and moving on. The roof doesn’t lie – the materials tell you exactly what went wrong and when.
We carry genuine CertainTeed accessories – underlayments, starter strips, ridge caps – for system-integrity repairs, but we’ll also tell you plainly when a comparable synthetic underlayment performs just as well for less money. That’s the repair-first approach our name promises.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Valley Glen
- Premature seal-strip failure on Landmark shingles. Valley Glen summers regularly push past 100°F, and that heat bakes the adhesive strips on CertainTeed Landmark shingles until they’re brittle. When the first Santa Ana wind event hits in September or October, shingles lift and peel off the deck. We see this on south- and west-facing slopes most often, and it usually appears within 10-12 years – well before the warranty period runs out. The fix is replacing the affected shingle courses and re-sealing the field, though if the failure is widespread, a partial reroof makes more sense.
- Dried-out underlayment beneath clay tile. Your tile roof may look perfectly intact from the ground while the felt underlayment beneath it has torn and failed. On 1920s-1950s Spanish Colonial Revival homes – which make up a large share of Valley Glen’s original housing – the underlayment beneath CertainTeed-spec tile dries out from decades of heat. The result is a ceiling stain with no visible roof damage. We lift the tile, replace the underlayment, and re-lay the salvageable tile.
- Granule loss and surface cracking on architectural shingles. Intense UV exposure on south- and west-facing slopes in Valley Glen accelerates shingle wear. CertainTeed architectural shingles lose granules, exposing asphalt that then cracks. Beyond the leak risk, granule loss reduces fire resistance – a real concern in a valley with a defined fire season each fall.
- Fastener corrosion at mixed-material transitions. Where CertainTeed shingles meet flat-roof additions or detached garages – a common configuration in Valley Glen, where pergolas and patio additions are attached to nearly every original home – the flashings pit and fail. Galvanized and aluminum flashing corrodes at these junctions, and water gets in at exactly the point where two roof systems meet. We replace the flashing, re-secure the transition, and re-lay shingles as needed.
- Skip-sheathing complications under old shingles. Many Valley Glen homes still have original skip sheathing or plank decking under their shingles. CertainTeed shingles need a solid, flat deck to perform correctly. When we tear off old layers and find skip sheathing, we re-deck the roof before installing new shingles – installing over gaps voids the material warranty and causes premature failure.
CertainTeed Service in Valley Glen: What Local Conditions Mean for Your Equipment
Valley Glen sits on the former Van Nuys and Los Angeles farming-and-development footprint along Van Nuys Blvd and Hazeltine Ave, and that history shows up on nearly every roof we walk — just as it does for the CertainTeed repair in Van Nuys homes we also service. Original homes from the 1920s through 1950s were built with clay tile or wood shingles, then expanded over the decades with flat-roof patio additions and detached garages. Those low-slope sections are almost always the last to be re-roofed and the first to leak. Why? Their CertainTeed underlayment and flashing sit in direct sun all day, with poor ventilation underneath. Heat doesn’t rise off a flat roof the way it does off a pitched one – it gets trapped at the membrane. The material deteriorates faster than the manufacturer’s rating suggests, and the first winter rain sends water into the addition or garage ceiling. If you own one of these older Valley Glen homes with an attached flat section, the smartest thing you can do is get that low-slope area inspected before every rainy season. It’s not the pretty part of the roof, but it’s where the failures start.
CertainTeed Models & Products We Service in Valley Glen
We work on the full CertainTeed residential line. That includes Landmark architectural shingles, Presidential Shake luxury shingles, Xact shingles, and CertainTeed clay and concrete tile underlayment systems. For repairs, we use genuine CertainTeed accessories – underlayments, starter strips, ridge caps, and hip-and-ridge components – to maintain system integrity. When an aftermarket component makes more sense for performance or budget, we’ll say so and explain why. The goal is a roof that holds up under Valley Glen’s heat, not a parts list that matches a catalog.
See the difference
Before
After
Before
After
Before
AfterCertainTeed Service Pricing in Valley Glen
CertainTeed roof repair in Valley Glen typically runs between $350 and $900 for targeted fixes like flashing replacement, seal-strip repair, or a shingle course replacement. Full underlayment replacement beneath clay tile runs higher, usually $1,800-$4,500 depending on the roof’s size and accessibility. Here’s what drives those numbers:
- Roof access and pitch. Steep Spanish Colonial roofs with tile require more setup time and safety equipment than a low-pitch bungalow.
- Material type. Replacing CertainTeed underlayment under tile costs more than patching shingles because tile has to be lifted and re-laid piece by piece.
- Deck condition. If we find rotted skip sheathing or plank decking, that gets repaired before any shingle goes down.
- Transition work. Mixed-material junctions – shingles meeting flat roofs or garage additions – take more labor than a uniform field.
Every estimate we write is line-itemed and free. Call (866) 650-8319 to schedule yours – we’ll walk the roof with you and show you exactly what we’re seeing.
Serving Valley Glen, CA — Our Local Coverage Area
We’re based in the Valley Glen area and know this community well, with Encino CertainTeed service also available nearby. Use the map below to see our full service coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Valley Glen
Valley Glen’s summer highs regularly exceed 100°F, and that heat bakes the adhesive strips on Landmark shingles until they’re brittle and lose their bond. The shingles lift during the first Santa Ana wind event, often within 10-12 years of installation. The fix depends on how widespread the failure is. Isolated shingles can be re-sealed and replaced; a broad failure usually means a partial or full reroof. Call (866) 650-8319 for a free assessment and we’ll tell you which camp you’re in.
Yes. Flat roofs over detached garages are the most common CertainTeed leakage point we see in Valley Glen and in our North Hills CertainTeed service area. The underlayment and flashing on these low-slope sections deteriorate faster because heat gets trapped at the membrane and ventilation is poor. We replace the failed membrane, re-secure flashings, and in many cases re-slope the surface slightly to improve drainage. We’ll always check the transition where the garage roof meets the house before quoting the work.
In nearly every case we see like this in Valley Glen, the tile itself is fine and the underlayment beneath it has failed. On 1920s-1950s Spanish Colonial Revival homes, the felt under CertainTeed-spec tile dries out, tears, and lets water through to the skip sheathing. The damage shows up inside as a ceiling stain with no visible roof problem from the street. We lift the tile, replace the underlayment with a synthetic membrane, and re-lay the salvageable tile. Call (866) 650-8319 if you’re seeing stains – this one gets worse fast.
No. Skip sheathing was standard on many Valley Glen roofs built before 1960, but CertainTeed shingles require a solid, flat deck to perform correctly and meet warranty standards. Installing over skip sheathing creates gaps the shingles can’t bridge, leading to premature failure and voided warranties. When we tear off and find skip sheathing, we re-deck the roof with plywood or OSB before laying underlayment and shingles.
For Valley Glen’s Santa Ana wind exposure, we often recommend CertainTeed Landmark shingles with their standard wind warranty, but for homes on open streets or with large gable ends, the Presidential Shake line offers heavier weight and a higher wind resistance rating. The right answer depends on your roof’s pitch, orientation, and surrounding tree cover. We’ll assess all three during the estimate and give you the honest recommendation. Call (866) 650-8319 to schedule a free walk-through.
Service Areas Near Valley Glen
We service Valley Glen and the surrounding San Fernando Valley communities, including Sherman Oaks, Van Nuys, North Hollywood, Studio City, and Valley Village. For CertainTeed work in the foothills, see our CertainTeed service in Shadow Hills. For work further east, we also cover CertainTeed service in Yucaipa. Not sure if you’re in our area? Call and ask – we’ll tell you straight. Learn more about our Valley Glen service area or our CertainTeed sales & service capabilities.
Book Your CertainTeed Service in Valley Glen Today
If your CertainTeed roof is showing signs of wear – lifted shingles, granule buildup in gutters, stains on ceilings – don’t wait for the next rain. Call (866) 650-8319 to schedule a free estimate. We’ll inspect, explain what we find, and give you a line-itemed price. Repair when it makes sense, replace when it’s right.
Written by Neil Drummond, Owner at Gable Roof Repair, serving Valley Glen and the San Fernando Valley.