Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roofing Company Across Alhambra
Roofing in Alhambra comes with a set of problems most roofing companies don’t talk about until they’re already on your roof. The big one: those beautiful 1920s and 1930s Spanish Colonial Revival homes with original clay tile look solid from the street, but the felt underlayment beneath the tile has been disintegrating for decades. When winter atmospheric river storms hit, water pours straight through and tile that looks fine starts leaking into bedrooms. We’re Mercer Roofing, and our Roofing Company team works on these older Alhambra homes every week. If you’re seeing water stains, missing tiles, or granules in your gutters, call (743) 200-8347 and we’ll send a background-checked technician with a written price before any work starts.
Why Mercer Roofing Is Alhambra’s Preferred Roofing Company Company
Alhambra homeowners call us because we show up the way a roofing company should: a real person answers the phone 24/7, and before our technician arrives, you get their name and photo sent to you. When they reach your door, they’re in a clean marked uniform with a photo ID badge. That’s our Threshold Verified standard, and every Mercer location is held to it. We’re part of the Threshold Group family, founded in 2000, with each location independently owned and operated.
Grant Whitlock leads our team, and he’s built the business around one idea: a homeowner should never wonder who’s on their roof. The 365-Day Done Right Promise backs every repair. If the work isn’t right within a year, we make it right. Written price before work starts. Written guarantee on every repair, with a free second visit if a repair fails. No fine print, no surprises on the invoice.
We know Alhambra’s blocks. We know the difference between a 1928 Spanish Colonial in Emery Park and a postwar stucco tract home off Garfield. That local knowledge means we quote the real scope of work, not just the tile that fell off.
Commercial Roofing in Alhambra
Commercial Roofing in Alhambra covers the flat and low-slope roofs you see on the storefronts along Valley Boulevard, the medical offices near Alhambra Hospital, and the apartment buildings that went up across the city between the 1960s and 1990s. These roofs fail differently than shingle roofs. Water ponds, seams open, and older built-up roofing delaminates under the San Gabriel Valley sun. A typical commercial roofing repair in Alhambra runs $850 – $2,400 depending on the membrane type and damage extent, while full commercial re-roofs generally fall between $6 and $14 per square foot.
Built-Up and Modified Bitumen Repairs
Most of Alhambra’s older commercial buildings still have built-up asphalt and gravel roofs, or modified bitumen over foam. Blisters and alligator cracking are the common failure modes here, especially after years of high inland heat loading. We patch, strip, and re-seam these systems, and we’ll tell you honestly if a roof has reached the point where patching it again doesn’t make sense.
Flat and Low-Slope Re-Roofs
When a commercial roof in Alhambra has multiple active leaks and the membrane has failed across its field, we recommend a full tear-off and replacement. We quote written line-item pricing so you know exactly what the membrane, insulation, and edge metal cost before we order materials. No allowances that balloon later. No vague verbal estimates.
Metal Roof Installation in Alhambra
Metal Roof Installation in Alhambra is growing fast, and for good reason: the city’s inland summer heat bakes asphalt shingles to death years earlier than manufacturers expect, while metal reflects that heat instead of absorbing it. For Alhambra homeowners planning to stay in their home for 20-plus years, metal often makes more long-term sense than shingles. Standing seam metal roof installation in Alhambra typically runs $14 – $22 per square foot installed, while corrugated or ribbed metal panels run $9 – $14 per square foot. That’s more upfront than shingles, but the lifespan and heat performance are different products entirely.
Standing Seam Panels on Older Alhambra Homes
We install standing seam over solid decking, and on Alhambra’s older homes that often means replacing rotted decking boards before the metal goes down. We’ll show you photos of what’s beneath the old roof before we order anything. You approve the decking scope in writing, at a fixed price, before we cut a single board.
Retrofit Metal Over Low-Slope Sections
Many Alhambra bungalows have flat rear additions with old built-up roofs that hold water and leak. Metal retrofit panels can solve persistent ponding where patching never does, but only if the substrate is sound. We inspect, we test, and we give you a written recommendation with prices attached.
Trusted Brands We Service in Alhambra
We install and repair roofing using manufacturer-recognized brands that hold up to Alhambra’s heat: GAF, Owens Corning, and CertainTeed for composition shingles, plus Atlas and Tamko when the project calls for them. Because we work with these brands regularly, we can match discontinued colors and profiles more often than you’d expect on Alhambra’s older homes. We don’t stock out-of-market oddballs, but we keep local inventory of the common profiles and colors used across the city, which means faster repair turnarounds, especially during the October-to-December Santa Ana season when tile roofs across Alhambra lose pieces all at once.
Common Roofing Company Problems We See in Alhambra Homes
- Crumbled felt under original clay tile. On pre-war Spanish Colonial Revival blocks throughout Alhambra, the clay tile overhead looks permanent, but the felt underlayment beneath it was installed with a 15-to-20-year lifespan. After 80 or 90 years, it’s dust. Water gets through, and the first sign is often a ceiling stain with no missing tile in sight.
- Santa Ana wind damage on tile fields. Alhambra sits in the wind path that funnels through the San Gabriel Valley passes during fall and early winter. Individual clay tiles lift and break, and if they land on a neighboring roof or car, the homeowner has a bigger problem than a roof repair. October through December is our busiest tile-repair season for exactly this reason.
- Flat rear addition leaks. Craftsman bungalows and early California homes in Alhambra often have flat or low-slope rear additions with old built-up roofing. When these leak, the water travels inward and shows up on interior walls far from the actual source. We trace the leak to its true entry point before we touch anything.
- Piecemeal patching over decades. Because Alhambra has seen sustained renovation investment since the 1980s, many roofs are patchworks: new shingles next to old, mismatched flashing, drip edge that’s been bent and re-bent. The assembly no longer functions as a system. We fix the system, not just the visible hole.
Pricing for Roofing Company in Alhambra, CA
Alhambra roof repair pricing breaks down roughly like this: a basic tile reset on a pre-war Spanish Revival runs $200 – $500; a roof leak diagnosis and localized repair runs $350 – $900 depending on access; a section of rotted decking replacement with re-shingling runs $1,500 – $3,000; and a full underlayment replacement beneath original clay tile on a typical 20-square Alhambra roof runs $8,000 – $14,000. The underlayment number surprises people, but it’s the real fix for Alhambra’s most common roof failure. Every quote we write is a fixed, line-item written price. You approve it before we start. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Alhambra
Our crews work throughout the West San Gabriel Valley. If you’re in South Pasadena, San Marino, Monterey Park, or San Gabriel, we cover those neighborhoods too. Our Roofing Company in Alhambra service area is built around the city and its immediate neighbors, so we’re never far when a leak needs attention. Same Threshold Verified standard on every visit, in every city we serve.
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 Roofing Company in Alhambra
The tiles are fine, but the felt underlayment beneath them is not. Alhambra’s pre-war Spanish Colonial Revival homes were built with original clay tile laid over felt that was never designed to last this long. After 80-plus years of inland heat and occasional rain, that felt crumbles to dust, and water passes straight through the tile gaps into your decking. The fix is an underlayment replacement, where we lift the tile, replace the felt with modern synthetic underlayment or ice and water shield in valleys, and re-set the original tile. Call (743) 200-8347 and we’ll inspect before we recommend anything.
More than the homeowner expects, almost every time. On a 1928 Spanish Colonial Revival in Emery Park, our crew answered a call about three tiles knocked loose off the front slope. When we lifted the surrounding field, the original felt crumbled to dust in our hands and the decking boards beneath were soft at the penetrations. We wrote the underlayment replacement into the contract as a defined allowance with the square count spelled out, replaced 20 squares of felt with ice and water shield in the valleys and synthetic underlayment across the field, re-set the original clay tile, and priced two sistered rafter repairs with written approval before we cut anything. That’s how we handle surprises: they get priced and approved in writing, not sprung on you mid-job.
Yes, we quote by the square, but we define the square count after an inspection, not from a satellite photo. On Alhambra’s older homes, the real scope is often hidden beneath the visible surface. A roofer quoting a missing-tile fix without probing the surrounding field is quoting the wrong job. We probe, we measure, and we write allowances into the contract for discovered scope like rotted decking or failed flashing. You see the square count before you sign, and you approve changes in writing before we proceed.
Alhambra gets significantly higher summer UV loading than coastal LA because it sits inland in the San Gabriel Valley, shielded from the marine layer. That accelerates granule loss on asphalt shingles, so we lean toward heavier architectural shingles from GAF, Owens Corning, or CertainTeed for most Alhambra homes. For the Santa Ana wind season, high-wind-rated installation with proper nailing patterns matters more than the shingle brand itself. We’ll explain the trade-off between price and lifespan for your specific roof before you choose.
When a roofing project on an older Alhambra home pulls a permit, the inspector typically checks framing, attic wiring, and waterproofing at any adjoining flat sections. That inspection often turns up undersized rafter spans or outdated electrical that must be brought to current code before the roof can close. We build those upgrades into the contract as defined allowances with written pricing so the inspection never surprises you. The permit is pulled, the inspection is passed, and you get documentation for your records. Call (743) 200-8347 for a free estimate and we’ll walk you through the process for your specific home.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Alhambra. Mercer Roofing is part of the Threshold Group family, founded in 2000.