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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Altadena
Roof replacement in Altadena runs $14,800 – $28,400 for a typical 1,800-square-foot home, depending on material choice, decking condition, and whether the house sits in a fire-rebuild zone. Most full replacements take 3 – 7 working days once materials land. If you’re in 91001 or 91003 and staring at a tired roof or fire-damaged decking, we can walk you through exactly what it will cost and what actually needs doing. Call (866) 321-6172 for a straight answer and a free inspection-based estimate.
Why Van Nuys Roofing Co Is Altadena’s Roof Replacement Team
We’ve worked enough Altadena roofs to know what’s under them before we even tear off the first shingle. This is not Sherman Oaks or even Pasadena. Altadena homes carry a specific set of conditions: original 1920s sheathing, decades of oak and pine litter, and now, post-Eaton Fire, a permitting and insurance environment that demands documentation most roofers never provide. Our crew has replaced roofs across 91001 and 91003, from the craftsman streets north of Mendocino Lane to the ranch tracts east of Lake Avenue. We know which houses still have wood shake, which ones need full redecking, and which ones can go straight to new underlayment and shingles.
Since the Eaton Fire, we’ve been on roofs in the burn zone and on homes two blocks outside it where the only damage was ember intrusion through old vents. That range of experience means we don’t panic when we find hidden rot or dry needles packed against sheathing. We document it, price it, and fix it. The work is handled in-house by our own crew, not subcontracted out. That’s how we keep quality consistent from Marengo Avenue to New York Drive.
We inspect first and recommend second. If your roof has five years left, we’ll tell you that. If it needs replacement now, we’ll show you pictures, explain why, and give you a written breakdown of what each material option costs. No pressure. No brand steering. You decide what goes on your house, and we install it correctly.
Styles & brands we work with
New Roof Installation in Altadena
New Roof Installation in Altadena means full tear-off of the existing roof, inspection of the decking underneath, installation of new underlayment, and a complete roofing system built to current code. On post-fire rebuilds and new construction along Altadena’s foothill streets, this also means meeting wildfire-resistant assembly standards that didn’t exist ten years ago. A new roof installation on an Altadena home typically runs $16,500 – $28,400 depending on square count, pitch, and material grade.
What We Find Under the Old Roof
On newer homes and rebuilds, the decking is usually clean. On original 1920s and 1950s houses, it’s a coin flip. We’ve opened roofs in Altadena and found rotted panels, termite trails, and compacted dry needles sitting directly against old wood sheathing. That’s why we never quote a new roof without either inspecting the decking or writing a decking allowance into the contract. If hidden damage shows up after tear-off, you approve the extra cost in writing before we cut a single sheet of plywood.
Wildfire-Resistant Assemblies
If you’re rebuilding after the Eaton Fire, your permit will almost certainly require a Class A roof assembly. That means fire-rated underlayment, specific shingle products, and proper ember-resistant venting. We install these assemblies regularly and know what the LA County inspectors in Altadena are looking for. We pull permits, schedule the inspection, and make sure the job passes the first time.
Reroofing in Altadena
Reroofing in Altadena means installing a new roof over the existing one without a full tear-off, and for most older Altadena homes we tell homeowners the same thing: don’t. Reroofing runs $9,800 – $16,200 when the existing decking is sound and code allows a second layer. The problem is that most Altadena houses from the early 1900s through the 1970s have decking that can’t handle another layer of shingles, and hiding what’s underneath doesn’t make it stop rotting.
When Reroofing Actually Makes Sense
Reroofing only makes sense when the substrate is verified clean and dry, which usually means a recently built home or a structure with a fully sheathed deck in good condition. Even then, Altadena’s Santa Ana winds and ember exposure make a second layer of shingles a worse bet than a full tear-off with new fire-rated underlayment. We’ll inspect and tell you honestly whether your house is a candidate. Most aren’t, and we’d rather lose a reroofing job than install one that fails in five years.
The Hidden Cost Nobody Quotes
If a roofer quotes reroofing over old wood shake or visible decking damage, they’re either not looking or not telling you the truth. In Altadena’s older housing stock, hidden dry rot and needle accumulation against original sheathing usually surface during the reroof, forcing an emergency redecking add-on the homeowner didn’t budget for. We write a decking allowance into every reroofing quote so you know the ceiling before we start.
Trusted Brands We Service in Altadena
We install and service GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral roofing systems. That’s seven manufacturers under one crew, which means when you sit down with us, we’re recommending based on your roof, your fire-zone requirements, and your budget. If you want GAF architectural shingles with a full system warranty, we’ll install them to spec. If CertainTeed’s fire-rated line fits your rebuild better, we’ll bring that instead. We’re not married to one brand, so you don’t get steered. For Altadena customers, we can order your chosen material and have it staged at your home before tear-off so the roof never sits exposed.
Common Roof Replacement Problems We See in Altadena Homes
- Concealed dry rot in original wood-shake decking. Homes built in the 1920s and 1930s often still have original wood sheathing under newer shingle layers. The rot doesn’t show until tear-off, and then it’s a redeck job before we can touch the new roof.
- Wind-driven ember intrusion through old soffit and fascia vents. Unprotected vents on older Altadena homes are exactly where embers entered during the Eaton Fire. A proper replacement means fire-rated venting, not just new shingles.
- Improper flashing at chimneys and penetrations. Altadena’s oak and pine canopy drops needles that pile up against chimneys and around skylights. Those spots become leak points and ember traps when the Santa Anas kick up.
- Dry-needle accumulation against roof decks. On tree-heavy streets in west Altadena, windblown litter packs into valleys and behind chimneys. We find needles compacted against sheathing that’s been holding moisture for a decade.
See the difference
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After
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AfterPricing for Roof Replacement in Altadena, CA
A straightforward architectural shingle roof on an 1,800-square-foot Altadena home runs $14,800 – $21,600. If your decking needs replacement, add $2,800 – $5,400. Full new roof installation with fire-rated assemblies, common in post-fire rebuilds, lands between $19,000 – $28,400. If you want Boral or high-end CertainTeed products, expect the upper end of those ranges. Reroofing over sound decking runs $9,800 – $16,200, but again, most older Altadena homes shouldn’t reroof at all. We give free written estimates with the decking allowance spelled out, so there’s no surprise change order. Call (866) 321-6172 to schedule yours.
Because the 2025 Eaton Fire burned through Altadena’s mature tree canopy, roof replacements here now routinely require removal of fire-damaged decking and dry-needle accumulation that techs find packed against original 1920s sheathing. That condition triggers full redecking and wildfire-resistant assembly upgrades not seen in neighboring cities like Pasadena or San Marino. If your home is two blocks outside the burn boundary, it still probably has ember damage to the vents and edge metal. We account for that on every quote.
What an Altadena Roof Replacement Actually Looks Like
On a 1920s Craftsman bungalow off Marengo Avenue, our crew pulled the original wood-shake roof and found three rotted sheathing panels plus dry oak needles compacted in the valleys. Debris the homeowner never saw. We replaced the decking, installed a Class A fire-rated underlayment and GAF architectural shingles with a starter strip and ice and water shield at the eaves, then added a ridge vent and new drip edge to close it out. That’s the job: tear off, expose, document, fix what’s underneath, and build a roof that handles wind, embers, and decades of falling oak litter.
We Also Serve Cities Near Altadena
Our crews cover Pasadena, La Cañada Flintridge, East Pasadena, and San Marino regularly. If you’re in one of those cities and want the same inspection-first approach from our Roof Replacement team, we’ll bring the same multi-brand expertise and honest decking assessment to your roof. For Altadena homeowners specifically, our Roof Replacement in Altadena page covers the full local scope.
Serving Altadena, CA — Our Local Coverage Area
We’re based in the Altadena 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 About Roof Replacement in Altadena
It means your roof replacement is now a fire-safety project as much as a weatherproofing one. Altadena homes in the burn zone and adjacent streets must meet wildfire-resistant assembly standards: Class A shingles, fire-rated underlayment, ember-resistant vents, and proper flashing at every penetration. Even if your house wasn’t directly burned, ember intrusion through old soffit vents was the single biggest failure mode in the fire, and any replacement should address that. Call (866) 321-6172 and we’ll inspect what you have and tell you what your permit will require.
Yes, and we handle it before it becomes a surprise line item. Every quote includes a decking allowance for exactly this reason. On older Altadena homes, we expect to find some combination of rotted sheathing, dry-needle accumulation, and compromised flashing once the old roof comes off. When we find it, we show you pictures, give you a written price for the additional work, and get your approval before we proceed. You never get a change order you didn’t sign off on.
No. Reroofing over original wood shakes is against code and would leave a rotting, ember-prone deck under your new roof. Wood shake means full tear-off, period. The good news is that a full replacement lets us inspect every inch of the decking, replace what’s compromised, and build a fire-rated system that will actually protect the house. Call (866) 321-6172 for a free inspection and a straight answer on what your roof needs.
We install fire-rated vents, close off unprotected openings, and use underlayments and edge details that meet Class A assembly standards. The venting is the critical part, because embers enter through soffit and fascia vents long before flames ever reach the roof surface. Older Altadena homes almost always need vent replacements as part of a roof job, and we build that into the quote rather than treating it as an optional add-on.
Most Altadena homes fall between 18 and 32 squares, with a “square” being 100 square feet of roof area. That number drives the entire cost: more squares means more shingles, more underlayment, more labor, more disposal. A small 1950s ranch on a flat lot might be 18 squares; a 1920s craftsman with complex gables and dormers can push past 30. We measure every roof by hand during the inspection so your quote reflects actual dimensions, not a guess from satellite imagery.
Written by Rick Dominguez, Owner at Van Nuys Roofing Co, serving Altadena and the surrounding foothill communities.