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 Roofing Company Across Westchester
If you own a home in Westchester, you already know the drill: the marine layer rolls in most mornings, the Santa Anas whip through in the fall, and a roof that was installed when Eisenhower was president is now facing its third or fourth decade of service. That combination is exactly why older Westchester homes need a roofer who understands the local housing stock, not a generic crew that treats every roof the same. Mercer Roofing Co Torrance serves Westchester with roof repair, roof replacement, roof inspection, metal roofing, tile roofing, and flat roofing. Every job starts with a written price before any work begins, and every repair includes a written guarantee. Call (424) 435-5428 to schedule a free estimate.
Why Mercer Roofing Co Torrance Is Westchester’s Preferred Roofing Company Company
Westchester homeowners tend to be specific about what they want. The neighborhood has real architectural character: Kentwood’s mid-century ranches, the Spanish Colonial Revival homes near LMU, the low-slope flat roofs throughout the 1940s and 50s tracts. When we send a crew to Westchester, the technicians already know what they’re walking into before the ladder goes up. Homeowners here have told us the same thing for years: they want to know who’s coming to the door, what the work will cost, and whether the repair will actually hold. That’s why every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard, arriving in a clean, marked uniform with a photo ID badge at the door. We send the technician’s name and photo before they arrive. And every repair includes a 365-Day Done Right Promise: if the work isn’t right within one year, we make it right. The phone is answered by a live person, 24/7, not a voicemail. Westchester homeowners call us because they want certainty as much as craftsmanship. Call (424) 435-5428 and you’ll reach a human being.
Our Roofing Company team works on Westchester roofs every week. We know where the tile supply houses are, which shingle profiles match the existing rooflines, and what the city’s building department expects on a reroof permit. Dispatch and scheduling are coordinated from the brand’s Los Angeles office; crews serve Westchester locally. You’re not getting a rotating cast of subs. You get the same standard every time, backed in writing.
Styles & brands we work with
Metal Roof Installation in Westchester
Metal Roof Installation in Westchester is a specific decision for a specific kind of home. The marine layer keeps things damp for months at a time, and standard asphalt shingles on a low-slope roof can hold that moisture longer than they should. Standing seam metal sheds water fast, handles Santa Ana wind uplift far better than 3-tab, and frankly looks right on a lot of mid-century modern Westchester homes. A typical metal roof installation in Westchester runs $18,000 to $38,000 depending on roof size, pitch, and whether we’re tearing off the old system or installing over an existing roof (which we generally don’t recommend on older Westchester homes because of the hidden decking issues we’ll get to below). Metal roofs here also need proper underlayment. We install high-temperature ice and water shield at the eaves, not felt paper, because the coastal air carries enough moisture to rot out the decking over a 20-year span.
Standing Seam on Low-Slope Westchester Roofs
Westchester has a lot of low-slope roofs from the 1940s and 50s. Standing seam panels work on slopes as low as 1/4:12 if the panel profile and seam height are engineered correctly. We also see homeowners choose metal when the existing tile is too brittle to walk on without breaking – metal gives you a walkable, clean surface that doesn’t require the constant tile replacement cycle.
When Metal Beats Replacing Tile
If your Westchester clay tile roof has failed decking underneath, the tile itself may not be worth salvaging. Replacing decking and reinstalling old tile can cost more than a new standing seam system. We walk every homeowner through both numbers in writing before any decision is made.
Residential Roofing in Westchester
Residential Roofing in Westchester means working on homes that were built between the 1940s and the 1960s, which presents a very different set of conditions than a new-build in Torrance or a 1980s stucco box in Carson. The older the house, the more likely the decking has taken on moisture from years of marine-layer exposure. We open up the roof and inspect what’s underneath before we quote anything beyond the surface work. A full residential roof replacement on a typical 1,400 to 2,000 square foot Westchester home runs $11,000 to $24,000 depending on material, pitch, decking replacement, and whether the home needs new flashing at chimneys, skylights, and plumbing penetrations. A repair – say, replacing a section of failed underlayment or a handful of cracked tiles – typically runs $650 to $2,400. Every price is written. No work starts without it.
Decking and Underlayment on Older Westchester Homes
The single biggest reason a Westchester reroof quote moves is the decking. The original 1×6 or plywood sheathing on a 1950s Kentwood home has spent 70 years under the marine layer. If the underlayment has failed, the wood may be soft, delaminated, or rotted. We write a per-sheet allowance into the contract so you know exactly what replacement decking costs if we find it. No mystery change order.
Tile Roof Replacement with Matching Patina
Westchester clay tile roofs develop a dark patina from the marine layer. You can’t just slap a bright terracotta replacement tile on and call it matched. We work with local suppliers who custom-fabricate tiles to match existing color, texture, and weathering. This is the kind of detail generic crews skip, and it’s why Kentwood homeowners specifically call us.
Trusted Brands We Service in Westchester
We install and repair roofing systems using manufacturer-recognized brands including GAF, Atlas, and Boral. If your Westchester home has a Spanish-style tile roof, Boral’s clay and concrete tile profiles match the original 1950s profiles better than most. For asphalt shingle replacement on gable or hip roofs, GAF architectural shingles and Atlas shingles both hold up well against wind uplift. Because we service Westchester regularly, we stock common flashing profiles, tile colors, and underlayment locally, which shortens the time from estimate to completed work. The goal is simple: get the right material on your roof, the first time, with a written guarantee you never have to fight for. Call (424) 435-5428 for a free estimate on any brand repair or replacement.
See the difference
Before
After
Before
After
Before
AfterCommon Roofing Company Problems We See in Westchester Homes
- Marine-layer moss and algae breaking down underlayment: The persistent morning marine layer in Westchester keeps north-facing roof slopes damp for months. Moss holds that moisture against the underlayment, accelerating rot that hides under what looks like a perfectly good tile or shingle surface.
- Improper flat roof repairs with generic asphalt shingles: Westchester’s low-slope flat roofs need modified bitumen, TPO, or a properly flashed built-up system, not three-tab shingles. We regularly see handyman patches that fail at the first winter storm because the slope was too low for shingle drainage.
- Clay tile replacement without decking inspection: Replacing individual cracked tiles on a 1950s Westchester home without checking the decking underneath is a temporary fix. The next Santa Ana wind event lifts the repaired section and you’re back where you started.
- Original 1940s flashing at chimneys and skylights: Homes near LMU and in the older tracts still have original galvanized flashing that’s rusted through. Water travels along the flashing and drips into the attic far from the visible leak. We replace all penetration flashing during any reroof, not just the obvious spots.
Pricing for Roofing Company in Westchester, CA
Here are the real numbers, because you deserve to know what to expect before you call. A minor roof repair in Westchester runs $450 to $1,200. A tile or shingle section replacement runs $1,500 to $4,000. A full asphalt shingle roof replacement on an average Westchester home runs $11,000 to $18,000. A standing seam metal roof runs $18,000 to $38,000. A full clay tile roof replacement with custom-matched patina runs $28,000 to $60,000, largely because the tile itself is expensive and the labor is detail-intensive. The biggest wildcard on older Westchester homes is decking replacement, which runs $65 to $95 per sheet when we find rot. We write that allowance into your contract up front, so the price doesn’t change on you mid-project without a written, signed approval. Free estimates are exactly that: free. A live person answers when you call (424) 435-5428.
We Also Serve Cities Near Westchester
While Westchester is home to a large share of our tile and flat roof work, we also serve homeowners in Torrance, Inglewood, Carson, and Hawthorne. The roofing issues are similar near the coast, but the housing stock and local building requirements do differ, and we adjust our approach accordingly. If you’re in a neighboring city and want the same written-price, photo-badged, guaranteed standard, call us. The number is the same: (424) 435-5428.
Serving Westchester, CA - Our Local Coverage Area
We’re based in the Westchester 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 Westchester
Yes, and this matters more in Westchester than almost anywhere else in the South Bay. The Kentwood neighborhood and the Spanish Colonial Revival pockets have architectural guidelines that effectively require matching the original roofing material and profile. Beyond the guidelines, the visual difference between a mismatched replacement tile and the surrounding patina is obvious. We custom-fabricate replacement tiles to match the existing weathering, and we document the match in writing before installation. Call (424) 435-5428 for expert tile matching.
Every three to five years, and more often if you’re near the coast side of Westchester where the marine layer sits longest. The tile surface can look fine while the wood underneath fails. We perform roof inspections in Westchester with a focus on moisture intrusion at the eaves, valleys, and around penetrations, because that’s where the rot starts. The inspection price is credited toward any repair: call (424) 435-5428 to book one.
Decking replacement. On a Kentwood home off 83rd Street, our crew opened up an original 1950s clay tile roof and found the decking underneath had rotted from years of marine-layer moisture trapped under failed underlayment. We replaced the decking, installed new ice and water shield at the eaves, and custom-fabricated replacement tiles to match the existing patina before reinstalling with new flashing at every penetration. The decking allowance was already written into the contract, so the price didn’t surprise anyone. We recommend that every Westchester homeowner ask their roofer what the per-sheet decking price is before signing anything. Mercer includes it, written, every time. Call (424) 435-5428 for a quote that accounts for this up front.
Yes. Reroofing in Westchester requires a city building permit, and the work must be inspected and approved. Mercer pulls the permit on your behalf, schedules the inspection, and fixes anything the inspector flags before we call the job done. No work starts until the permit is active and the written price is signed. That’s standard for us, not an upsell. Call (424) 435-5428 and we’ll walk you through the permit process for your specific home.
You need a different system. Architectural shingles are rated for slopes of 2:12 or steeper. Many Westchester flat and low-slope roofs are below that, so we install modified bitumen, TPO, or a properly flashed built-up system instead. On mid-century Westchester homes with flat roofs, the right membrane with sealed seams is what stops the winter storm leaks. We’ll inspect your roof’s actual slope and show you the options that will pass permit and hold up. Call (424) 435-5428 for a free estimate.
Written by Grant Whitlock, Owner at Mercer Roofing Co Torrance, part of the Threshold Group family, serving Westchester with roof repair, replacement, and inspection since 2000.