Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
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 $14,000 – $32,000 for a typical single-family home, with fire-rated Class A assemblies now driving most quotes after the 2025 Eaton Fire. If you’re off Lake Avenue or up near the foothills in 91001, the conversation has shifted: the question isn’t just what a new roof costs, it’s whether it will survive the next Santa Ana wind event. We’re Ridge Cap Roof Repair, and we’ve been working these streets since the rebuild began. Call (866) 361-0798 and we’ll walk your roof with you, no pressure, no upcharge for the truth.
The reality in Altadena right now is that roof replacement is not a commodity job. The wildland-urban interface, the FHSZ maps, the debris-flow concerns on the north end, the older Craftsman and Spanish Revival stock with skip sheathing – all of it demands a roofer who understands what the county will require before the first shingle comes off the pallet. We do. From the ridge cap down, every detail gets checked against current WUI code, not just what was standard five years ago.
Why Ridge Cap Roof Repair Is Altadena’s Roof Replacement Team
We’re not a sales crew that hands the work to a subcontractor. Our inspection team, repair crew, and Roof Replacement installers are the same people. That matters in Altadena because the homes here need a lot of up-front assessment: skip sheathing checks, party-wall flashing conditions, attic ventilation audits, and FHSZ compliance review. When the person who finds a problem is the person who fixes it, nothing gets lost between notes and nail guns.
Noel Cardenas runs our crews with a simple rule: inspect before you recommend. That’s why we’ll tell you when a repair makes sense and when it doesn’t. We work with seven manufacturers – GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral – so the material spec comes from what your roof actually needs in this climate, not from what’s cheapest for us to stock. On a hot August afternoon in Altadena, a dark shingle isn’t just cosmetic; it’s a heat load decision. We factor that in.
We’ve worked projects off Marengo Avenue, up in the Meadows, and across the 91003 flats. We know which streets have the tightest setbacks and which HOAs require architectural shingle profiles to match the original roof character. That local knowledge shapes the quote so you’re not surprised when permit review asks for fire-rated underlayment documentation.
Styles & brands we work with
New Roof Installation in Altadena
New Roof Installation for an Altadena home typically runs $16,000 – $34,000 depending on square footage, pitch, and how much of the existing deck needs to come out. This is a full tear-off to the framing, a new solid deck where required, underlayment rated for the FHSZ, and a Class A shingle or tile system. Most post-fire rebuilds and full replacements on homes built before 1960 are landing in this range, especially when skip sheathing has to go.
Full Deck Replacement for Fire Code
Older Altadena homes often have skip sheathing – boards spaced with gaps that were fine under wood shake but are now ember funnels. Current WUI code in the FHSZ requires a solid deck before Class A underlayment goes down. That’s an added cost step some low bids quietly omit. We don’t. We install new OSB or plywood decking and document every layer for your permit file and insurance paperwork.
New Construction and Full Rebuilds
If your lot is a clean rebuild after the Eaton Fire, we handle new construction roofing from substrate to final inspection. That means coordinating with your framer, hitting shear and nailing schedules that meet current LA County code, and getting the assembly signed off the first time. A new roof in Altadena is not the place to cut corners on fastener patterns.
Reroofing in Altadena
Reroofing in Altadena – laying a new roofing system over the existing deck when it’s structurally sound – runs $12,000 – $26,000 for most single-story homes, and $18,000 – $32,000 when we’re removing multiple layers and replacing decking sections. The lower end applies when your current deck is solid plywood that passes inspection and we can go right over it with new underlayment and shingles. The upper end shows up when we find rotted boards, inadequate nailing, or vintage skip sheathing that has to come out to meet fire code.
Layer Count and Sheathing Condition
Some Altadena homes still carry two or three layers of old roofing because the house predates modern tear-off requirements. LA County generally limits total layers and will not sign off on a reroof over deteriorated substrate. We’ll check layer count and deck condition during the initial inspection – it changes the price materially, which is why we give written line-item quotes, not verbal ranges.
Flashing and Party-Wall Details
On tight Altadena lots, roofs often run straight into a neighbor’s wall or a shared parapet. Reroofing here is as much about metal work as shingles. We replace step flashing, counter-flashing at party walls, and crickets behind chimneys with the same care the ridge cap gets – because water doesn’t care whose wall it is when it finds a gap.
Trusted Brands We Service in Altadena
Our crews install and service Owens Corning, IKO, and Atlas systems regularly in Altadena, alongside GAF, CertainTeed, Tamko, and Boral. That range means we can match a Spanish Colonial’s clay tile profile, spec a high-wind architectural shingle for the foothill gusts, or go with a lighter Owens Corning color that drops attic temps in July without waiting on a special order. Seven manufacturers, one crew – and we keep common flashing, ridge cap, and underlayment stock staged for Altadena jobs so a materials delay doesn’t leave your home exposed for weeks.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Altadena Homes
- Skip sheathing left in place under a Class A assembly. If a roofer puts new shingles over gapped boards without a solid deck, embers can still reach the attic during a wind event. The assembly fails, insurance asks questions, and the inspection gets red-tagged. We replace the deck first, every time.
- Improper flashing at shared walls. Altadena’s tight setbacks mean many roofs terminate inches from a neighbor’s stucco or siding. Poor step flashing here leaks slowly, and by the time you see the stain inside, the sheathing is already soft. We inspect party-wall conditions before quoting so the number is honest.
- Non-ember-resistant vents in FHSZ zones. Standard off-the-shelf ridge and soffit vents can admit embers. LA County now requires ember-resistant venting in designated fire hazard zones, and older homes fail this often. We upgrade venting as part of the reroof, not as a change order later.
- Old roof layers hiding structural issues. A 1920s Craftsman off Altadena Drive might have original shakes over skip sheathing, a layer of 1970s asphalt, and a failed patch job from 2005. Tear-off reveals warped rafters or termite damage that changes the deck plan. Our quotes include a deck replacement allowance so you’re not blindsided mid-job.
Pricing for Roof Replacement in Altadena, CA
A straightforward architectural shingle roof replacement on a 1,200 – 1,600 sq ft Altadena home runs $14,000 – $22,000. Add solid deck replacement over skip sheathing and you’re at $18,000 – $28,000 with fire-rated underlayment. Larger foothill homes with tile or higher-pitch roof planes land between $26,000 and $38,000. What moves the number: deck condition, number of layers being removed, FHSZ requirements, access for staging, and whether we’re coordinating a party-wall notice with your neighbor. Call (866) 361-0798 for a written line-item quote. Estimates are free, and we’ll tell you outright if a repair holds you over for another five years instead.
We Also Serve Cities Near Altadena
Our crews work across the San Gabriel foothills and the adjacent flats, so if you’re in Pasadena, La Cañada Flintridge, East Pasadena, or San Marino, we cover those areas too. The same fire-code experience carries over directly – La Cañada and the northern end of Pasadena share Altadena’s wildland-urban interface conditions. See our Roof Replacement in Altadena page for the local specifics, or call us and we’ll route the right crew to your street.
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
Yes, every roof replacement in unincorporated Altadena requires a permit through LA County Building and Safety, and homes inside a Fire Hazard Severity Zone trigger additional review. The county will want documentation that your assembly meets Class A fire rating, that underlayment is the rated product, and that vents are ember-resistant. We handle the permit package and coordinate inspections. Call (866) 361-0798 and we’ll check your parcel’s FHSZ status before you commit to anything.
We stage materials in the driveway or street with a permit, never blocking a neighbor’s access unless we’ve agreed on a schedule in advance. On a tight lot off Marengo Avenue, we kept the shared driveway clear the entire job by staging tear-off debris in a street roll-off and walking materials in by hand. We’ll map access before the quote so you know exactly how the site will run.
We knock on doors and give written notice 48 hours before tear-off starts, and we coordinate directly with neighbors when flashing work touches a shared wall or parapet. For party-wall conditions, we document the existing condition with photos before we start so there’s no dispute later. It keeps the job moving and keeps everyone civil.
Yes, LA County limits construction noise to 7:00 a.m. to 8:00 p.m. on weekdays, and we typically start at 7:30 a.m. and wrap tearing by late afternoon. Weekend work is more restricted and generally reserved for weather emergencies or permit-driven deadlines. If you have a specific HOA or neighborhood covenant, we’ll follow the stricter standard.
The Eaton Fire changed what code, insurance, and common sense require. If you’re replacing a roof in Altadena now, expect a Class A assembly, solid decking over skip sheathing, ember-resistant vents, and underlayment rated for fire exposure. Insurance carriers are asking for documentation of these details before renewing coverage. We build and document to that standard, because a roof that doesn’t meet current WUI code in this community is not a roof you want to pay for twice.
Whether you’re in the 91001 foothills, the 91003 flats, or rebuilding a lot along the canyon edge, the right roof for Altadena has to answer to fire code, wind, and history. We inspect before we recommend, and we repair when it makes sense – replace when it doesn’t. Call (866) 361-0798 to schedule your free estimate, or walk your roof with us before the next Santa Ana season.
Written by Noel Cardenas, Owner at Ridge Cap Roof Repair, serving Altadena and the San Gabriel foothills.