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
Fast, Reliable Roof Replacement Across Alhambra
Roof replacement in Alhambra typically costs between $14,500 and $32,000 for a standard single-family home, with most tear-off and re-roof jobs landing in the $17,000 to $24,000 range depending on what’s underneath the old shingles. Homes built before 1960 often run higher because hidden wood-shake layers and skip-sheathing force full redecking before new underlayment can go down. We’ve worked on roofs throughout 91801, 91803, and the surrounding tracts long enough to know the difference between a quick cover-over and a job that needs to go down to the rafters. Call (855) 597-2817 for a free estimate that accounts for what your roof actually is, not what a generic bid assumes.
Our crews know Alhambra’s streets: the Spanish Colonial Revival bungalows off Main Street, the postwar ranch tracts near Alhambra Park, the hillside streets where drainage and access change how we stage a tear-off. We scope every replacement with a material-level inspection first. That means we open the roof’s history before we quote it.
Why Seacrest Roofing Is Alhambra’s Preferred Roof Replacement Company
We’re not a single-brand shingle dealer. Seacrest Roofing stocks and installs across seven major shingle manufacturers, which matters more in Alhambra than most homeowners realize. When your 1920s Spanish Colonial has hidden wood shingles under two layers of asphalt, and the city’s Title 24 enforcement requires a cool-roof product, you need more than one material option. You need the full catalog and someone who can tell you which products actually meet the energy code while matching your home’s original look.
Noel Chambers, our owner, built Seacrest Roofing around diagnostic integrity: inspect first, then recommend. That’s why we offer roof inspection as a standalone service. If your roof in Alhambra has another five years in it, we’ll tell you that. If it needs replacement, we’ll show you every brand that fits, from GAF and CertainTeed to Owens Corning and IKO, with warranty tiers that match your investment level. We don’t steer you to one product family because we have no reason to. Seven brands, one honest recommendation.
From tear-off to final inspection, our replacement team handles the entire job in-house. No subcontracted crews, no handoff between the inspector who found the problem and a different contractor who fixes it. The same people who diagnose your Alhambra roof are the ones who replace it.
Styles & brands we work with
Flat Roof Replacement in Alhambra
Flat Roof Replacement on an Alhambra home usually means a built-up roof or modified bitumen system on a bungalow addition, a detached garage, or a mid-century ranch with a low-slope main deck. These roofs fail differently than steep shingle roofs. Water ponds, seams separate at parapet walls, and the constant San Gabriel Valley sun bakes the top membrane until it cracks. A flat roof replacement in Alhambra typically runs $9 to $15 per square foot installed, so a standard 800-square-foot garage roof lands between $7,200 and $12,000.
Tear-Off and Membrane Options
Most Alhambra flat roofs need full tear-off because the existing layers are often old torch-down or gravel-topped systems that hide saturated insulation underneath. We strip to the deck, check for rot at the edges, and rebuild with a new cover board before laying the membrane. Product choice matters here: some reflective single-ply membranes help with Title 24 cool-roof requirements, while modified bitumen gives you a tougher top surface for a roof that sees foot traffic.
Drainage and Parapet Detailing
Flat roofs in Alhambra’s older neighborhoods often fail at the drains first. Scuppers clog, crickets weren’t framed in the original build, and water sits against stucco parapet walls until it finds its way inside. A proper flat roof replacement includes regrading the existing slope or installing tapered insulation to move water to the drains. That’s part of the quote, not a change order we hit you with halfway through.
Roof Installation in Alhambra
Roof Installation on new construction or additions in Alhambra runs $16,000 to $38,000 for a full single-family home, depending on framing complexity, roof pitch, and the product you choose. This is different from a replacement: the deck is new, there’s no hidden layer to discover, and the work moves faster. But Alhambra still has its local wrinkles. City inspectors enforce Title 24 energy code on new roof assemblies, which means your contractor needs to spec the right underlayment, ventilation, and reflective surfacing from the start.
New Construction and Additions
We work with Alhambra homeowners and their architects on new builds, ADUs, and room additions. Roof installation on a detached ADU in the rear yard runs $8,000 to $18,000, including framing, underlayment, and shingles or standing seam. Because we carry multiple brands, we can match the main house’s roof or spec a product that fits the ADU’s budget without downgrading the warranty.
Skip-Sheathing and Deck Code
One thing that catches homeowners off guard in Alhambra: older homes built with skip-sheathing don’t meet current deck requirements for a new roof installation on an addition. Gaps between the boards can’t support modern shingle fastening patterns. We recommend solid sheathing for any new roof plane, and we’ll tell you before the quote, not after the framing inspection.
Trusted Brands We Service in Alhambra
We’re an authorized installer for GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That’s the broadest material selection a residential roofer can reasonably offer, and it means something concrete for Alhambra homeowners. If your HOA or the city’s historic review asks for a specific look, we can match it with a tile or shingle from a different manufacturer than the one your neighbor’s contractor pushed. We keep local stock for Alhambra jobs, which means quicker turnaround on common products and no two-week waits when a roof gets torn off and the weather turns. Your roof, your material choice. We carry the full lineup.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Alhambra Homes
- Hidden wood shingles under asphalt layers. Original 1920s shake roofs were often covered over with one or two layers of asphalt instead of being torn off. You won’t know until we strip the top layers, and neither will a contractor who bids without accounting for the possibility. We scope for it up front.
- Skip-sheathing that flexes and fails. Bungalows built between 1920 and 1945 often have skip-sheathing instead of solid decking. Once the old shingle load comes off, the gaps between boards can’t hold new fasteners properly, and the whole plane needs redecking.
- Minimal attic ventilation. Many Alhambra homes from the 1950s and 60s have undersized or blocked attic vents. San Gabriel Valley heat cooks the shingles from below, and winter rain finds the flashing failures that heat stress created. We address ventilation on every replacement we quote.
- Flashing failures at valleys and penetrations. Homes near Alhambra Park and along the older streets off Main Street have complex rooflines with valleys, chimneys, and vent penetrations that gather water. Old flashing corrodes, and the underlayment beneath it rots. That’s a replacement detail, not a repair detail.
Pricing for Roof Replacement in Alhambra, CA
A full tear-off and re-roof on a standard single-family Alhambra home runs $14,500 to $32,000. Architectural asphalt shingles on a simple ranch from the 1960s typically land at $16,000 to $21,000. A Spanish Colonial Revival with hidden wood shingles, skip-sheathing replacement, and a reflective clay tile roof to meet Title 24 runs $28,000 to $38,000 or more. Flat roof replacement on a garage or low-slope addition is $9 to $15 per square foot. The single biggest variable in Alhambra isn’t the product you choose, it’s what’s under the existing roof. We scope for hidden layers and redecking before we quote, so the number we give you is the number the job costs. Call (855) 597-2817 to schedule a free estimate, and we’ll walk the roof with you.
We Also Serve Cities Near Alhambra
Seacrest Roofing handles Roof Replacement for homeowners throughout the western San Gabriel Valley. From Alhambra, our crews regularly work in East San Gabriel, San Gabriel, South Pasadena, and San Marino. Each of those cities has its own permit quirks and housing stock, but the same inspection and material-neutral approach applies. If you’re a few blocks outside Alhambra’s city limits, we’re still your local crew.
Serving Alhambra, CA — Our Local Coverage Area
We’re based in the Alhambra 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 Alhambra
An honest Alhambra roof quote breaks out tear-off, decking assessment, underlayment, shingle or tile product, flashing replacement, ventilation upgrades, permits, and disposal separately. If a bid bundles everything into a single number and doesn’t mention what happens if hidden wood shingles or skip-sheathing show up once the old roof comes off, that’s a quote built on assumptions, not inspection. Ours includes line items for potential redecking and reflects Title 24 product requirements in the product price itself. Call (855) 597-2817 for a quote you can actually compare line by line.
Because it was standard practice from the 1940s through the 1980s to nail new asphalt shingles directly over the original wood shake roof instead of tearing it off first. The old shake was considered a stable nailing surface, and it saved disposal costs. In Alhambra’s neighborhoods near Alhambra Park and the tracts off Main Street, we find original 1920s wood shingles under later asphalt layers on a substantial share of replacement jobs. That hidden layer has to come off, and the skip-sheathing beneath it usually needs redecking before the new roof can go on.
Yes, but not as much as you might think. Title 24 requires reflective surfacing on most steep-slope roof replacements in Alhambra, which pushes you toward certain shingle colors and tile profiles with higher solar reflectance values. Some asphalt shingle colors don’t qualify. Boral and certain other tile lines do, and we carry them. The constraint is real, but with seven manufacturers in our lineup, we can usually find you a product that meets code and keeps the look you want.
Skip-sheathing means the original roof deck was built with gaps between the wood boards, sometimes four to six inches wide. It was fine for wood shingles, which needed airflow underneath. It won’t pass inspection for modern shingle installation because the fasteners need continuous nailing surface. When we strip an Alhambra home with skip-sheathing, we pull the old boards and lay solid plywood or OSB decking before the first piece of underlayment goes down. It adds about $2.50 to $4 per square foot, and we scope for it before the quote, not after the tear-off uncovers it.
We calculate the attic’s net free vent area against the square footage of the attic floor and compare it to current building code. Most 1950s and 60s ranch homes in Alhambra were built with gable vents and nothing else, which doesn’t move enough air for a 100-degree San Gabriel Valley summer. We typically add continuous ridge vent matched with soffit intake vents, which gives you balanced airflow from eave to peak. On older homes with no soffits, we’ll spec alternative intake. Ventilation is part of every replacement quote we write in Alhambra because it directly affects how long your new roof lasts.
Written by Noel Chambers, Owner at Seacrest Roofing, serving Alhambra and the San Gabriel Valley with material-level roof inspections and replacements.
If you’re weighing replacement options for your home in Alhambra, start with a roof you can trust. Call (855) 597-2817 to schedule a free estimate. We’ll inspect the roof, explain what’s actually going on, and show you every material option that fits your home and your budget.