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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
GAF Ridge Vent Installation: The Woodland Hills Owner’s Guide
We install GAF-compatible ridge vents throughout Woodland Hills, and most jobs run between $650 and $1,100 installed, depending on the linear footage and how much old vent material needs to come off first. We stock GAF Snow Country and Cobra ridge vent on our trucks, so in most cases we can complete the swap in a single visit. You typically discover this problem two ways: either you’re in the attic on a hot afternoon and realize it feels like a sauna, or you’re up on a ladder cleaning gutters and notice the vent material is cracked, sun-baked, or peeling away from the ridge line.
Which GAF Models This Applies To
GAF’s ridge vent lineup includes the Cobra series (Cobra, Cobra Snow Country, Cobra Exhaust Vent for tile) and the more rigid high-flow options sold through their commercial and architectural lines. The most common unit we replace in Woodland Hills is Cobra Snow Country, which homeowners often choose because it handles the occasional heavy downpour better than the standard Cobra. GAF also manufactures a metal ridge vent under their Master Flow brand, which some local homes have. Here’s the compatibility gotcha most people don’t know: GAF changed the end-cap profile on Cobra Snow Country around 2019, so if half your ridge is the older profile and half is new, you’ll get a visible seam and a weak point where heat escapes unevenly. We check that before anything gets nailed down. As an independent contractor, we’re not affiliated with GAF, but we’ve installed their vent products for years and stock genuine GAF parts alongside quality equivalents from Owens Corning and CertainTeed when a specific profile has been discontinued.
Styles & brands we work with






Signs Your GAF Ridge Vent Installation Is Failing
- Attic temperatures rising noticeably. Ridge vents work by letting hot air escape at the peak. When the vent material degrades or the internal baffle collapses, attic heat climbs. In Woodland Hills summers, that means your air conditioner runs longer and your upstairs rooms never quite cool down.
- Visible cracking or brittleness along the vent material. UV exposure does this over time. The plastic or foam matrix dries out, the surface cracks, and then water gets into places it shouldn’t. We see this regularly on homes in the Warner Center corridor where ridge lines get direct afternoon sun.
- Water staining on ceiling drywall near exterior walls. A failed ridge vent lets rain in at the roof’s highest point. The water travels down rafters and shows up as stains that are nowhere near any plumbing. That’s a telltale sign it’s a roof vent issue, not a pipe issue.
- Shingle granules collecting in gutters near the ridge. When the vent shifts or the nails backing out, it tugs on surrounding shingles. Granule loss accelerates and you find dark grit in the gutter downspouts even though the shingles are mid-life.
- You can see daylight through the vent from inside the attic. If you’re in the attic during the day and see gaps or pinpoints of light where the vent meets the ridge opening, the vent has pulled away from the decking. That means it’s no longer sealing out weather.
Replacement Cost & What’s Included
In Woodland Hills, GAF ridge vent replacement typically falls between $650 and $1,100 for a standard single-family home with 30 to 50 linear feet of ridge. The range depends on three things: how much of the old vent and nails need to be removed, whether the roof decking at the ridge is sound or needs patching, and whether we’re installing standard Cobra or Snow Country (Snow Country runs slightly higher). Every quote is a written line-item price before work starts: vent material, nails, sealant, debris haul-off, and labor. There are no change orders unless we find decking rot that genuinely requires attention, and we’ll show you photos before anything extra is approved. The work is covered by our written 365-day guarantee, and if the repair fails within that year, the second visit is free.
See the difference
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AfterDIY or Call Us?
You can safely inspect your ridge vent from a ladder or from inside the attic without risking much. Look for cracks, gaps, or shifted vent sections. What you shouldn’t do is attempt the replacement yourself while standing on a sloped roof. Ridge vent work means working at the highest point of the roof, pulling nails along the ridge line, and handling sealant and flashing at height. Falls from ridge height are serious, and a bad seal at the peak means water damage you won’t notice until it’s expensive. The ridge is also where wind uplift pressure is strongest, so a poorly fastened vent can peel off and take shingles with it. If you see signs of failure, call us at (341) 217-2677 and we’ll give you a written price before any work begins.
FAQs
Most GAF ridge vents last 15 to 20 years in our climate before UV damage and heat cycling start breaking down the material, though we’ve replaced vents on south-facing Woodland Hills roofs that failed in under a decade due to intense sun exposure. If your roof is older than 15 years and the vent is original, budget for replacement soon. Call (341) 217-2677 and we’ll inspect it during a free estimate.
Small problems like a lifted end cap or a few backed-out nails can sometimes be repaired, but once the vent material is cracked, brittle, or collapsed, patching is temporary at best and the heat and moisture issues continue. We’ll tell you honestly which situation you have and put that recommendation in writing before anything is done. Call (341) 217-2677 for a straight answer and a free estimate.
For most Woodland Hills homes, we complete GAF ridge vent replacement in four to six hours. That includes removing the old vent, inspecting the ridge opening, installing the new vent and sealant, and cleaning up debris. Larger homes or vents with decking rot at the ridge can extend the job to a full day. Call (341) 217-2677 and we’ll give you a written time estimate with your quote.
We stock GAF Cobra and Snow Country ridge vent on our trucks, along with the nails, sealant, and flashing needed for a complete install. You won’t need to order anything or wait for parts to ship. If your home has an older or less common GAF vent profile, we source the correct match before we schedule the work. Call (341) 217-2677 to confirm what’s on the truck for your job.
Scheduling Your Ridge Vent Replacement in Woodland Hills
A roof should be the last thing you worry about. Let’s make sure it is. When you call Mercer Roofing Co Woodland Hills, you get a live person on the phone, not a voicemail. We’ll schedule a time for a technician to come out, and before they arrive, you’ll get their name and photo sent to you. When they knock, they’ll show a photo ID badge at the door, and that’s the same person whose name you already have. Every ridge vent replacement starts with a written price. No surprises, no vague handshake deals. Call (341) 217-2677 today to schedule your free estimate and get your GAF ridge vent replaced right.
Written by Grant Whitlock, Owner, Mercer Roofing Co Woodland Hills at Mercer Roofing Co Woodland Hills, serving Woodland Hills and nearby areas.