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 West Los Angeles
Roof repair and replacement in West Los Angeles comes down to one thing most homeowners don’t see until it’s too late: the salt air. A flat roof seam that held fine in Sherman Oaks will split open in West LA within a few seasons because the marine layer eats standard galvanized fasteners and flashing faster than inland suppliers expect. We know this because we work on 1920s Spanish Colonials off Westwood Boulevard and postwar bungalows near Sawtelle every week. If you need a straight answer on what your roof needs and what it will cost, call (213) 521-8272. We’ll send a real person, with a name and a photo, before any work starts.
Why Mercer Roofing Co Los Angeles Is West Los Angeles’s Preferred Roofing Company Company
We’re part of the Threshold Group family, founded in 2000, and every technician who arrives at a West Los Angeles home is background-checked, identity-verified, and badged. You get their name and photo before they knock. That matters when you’re home alone with young kids or an older parent, and it’s the reason homeowners in neighborhoods from Cheviot Hills to Rancho Park keep calling us back.
Our Roofing Company team works on the roofs this city actually has: original clay tile on Spanish Colonial homes, composition shingles on 1940s Tudors, built-up and modified bitumen on the flat roofs that dominate apartment buildings along Santa Monica Boulevard and Pico. We don’t just patch what is visible. We inspect underneath, because that is where West LA roofs fail first.
Every job starts with a written price. Not a ballpark. Not a verbal estimate. A line-item quote you can hold us to. And every repair carries a 365-Day Done Right Promise: if the work is not right within a year, we make it right, with a free second visit included if a repair fails. When you call (213) 521-8272, a live person answers. Not a voicemail, not a call-back form. A human being, 24/7.
Scheduling and dispatch are coordinated from our brand’s Los Angeles office, with crews serving West Los Angeles locally. Led by Grant Whitlock, our team stocks coastal-spec fasteners, underlayment, and flashing so we don’t have to special-order parts that inland suppliers don’t carry.
Styles & brands we work with






Roof Inspection in West Los Angeles
Roof Inspection in West Los Angeles means lifting tiles and looking underneath, not just walking the surface with a clipboard. In this city’s older Spanish and Tudor neighborhoods, the underlayment beneath 1920s clay tile often degrades to dust while the tiles above look perfectly intact from the curb. A visual surface check misses it. Our inspections cost between $250 and $450, depending on roof size and whether we’re inspecting clay tile, flat membrane, or a mix of both.
Hidden Underlayment Rot
Our crew recently repaired a 1920s Spanish Colonial on a street in Westwood’s Little Holmby area where the clay tile looked pristine from the curb. Our inspection found the original felt underlayment had turned to dust under the tiles. We lifted the tiles, replaced the decking where the marine air had corroded old nails, and installed a modern synthetic underlayment rated for salt exposure before resetting every tile. The homeowner had lived with intermittent ceiling stains for years because other roofers only inspected the surface.
Flat Roof Seam and Flashing Check
On flat and low-slope roofs common along Pico Boulevard and south of Olympic, we check seam integrity, flashing tightness, and ponding patterns. Salt air doesn’t just sit on top of a flat roof; it works into open seams and eats at the metal drip edges and scuppers. Catching that early is a $300 inspection, not a $12,000 membrane replacement.
Commercial Roofing in West Los Angeles
Commercial Roofing in West Los Angeles means flat built-up roofs, modified bitumen, and the occasional metal parapet cap, all of which get hammered by this city’s coastal conditions. Multi-unit buildings along Sawtelle Boulevard and mixed-use properties near Westwood Village need a contractor who specifies marine-grade materials from the first bid, not the second repair. Typical commercial flat roof coating or seam repair in West Los Angeles runs $1,800 to $9,500 depending on square footage and membrane type. Full commercial re-roofs start around $14,000 and go up from there.
Coastal-Spec Fasteners and Flashing
Standard galvanized fasteners corrode within 5 to 7 years of West LA salt air. We specify hot-dip galvanized or stainless steel on every commercial job. The price difference is real, usually 8 to 12 percent on the hardware line item, but replacing rusted fasteners in year six costs five times that.
Thermal Expansion on Flat Roofs
Long dry spells bake flat roof membranes. UV exposure here is relentless. When winter rain hits, any crack opened by thermal expansion lets water pond and seep. We see this on older commercial properties near Sepulveda and Pico every December. Our written quotes include a seam-reinforcement line item for exactly this reason.
Trusted Brands We Service in West Los Angeles
We install and repair GAF, CertainTeed, and Owens Corning systems, and we stock coastal-spec accessories for all three. That means no two-week wait for a stainless drip edge or marine-rated underlayment while your exposed decking sits through a fog cycle. When a West LA homeowner calls with a leaking flat roof near Overland Avenue, we can start next day because the materials are already on our truck, not on a supplier’s order sheet.
See the difference
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After
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Before
AfterCommon Roofing Company Problems We See in West Los Angeles Homes
- Salt-corroded galvanized fasteners and flashing. The marine layer eats standard hardware in 5 to 7 years, loosening tiles and opening leaks around chimneys, vents, and skylights. We replace with stainless or hot-dip galvanized, every time.
- Flat roof seams splitting from thermal expansion. Months of UV dry spells open hairline cracks that winter rain turns into ponding water. The fix is seam reinforcement with marine-rated membrane, not a bucket of coating.
- Hidden underlayment rot beneath intact clay tile. This is the West LA signature failure. Original 1920s felt underlayment turns to dust while the tile above looks perfect. Only a lift-and-inspect catches it.
- Santa Ana wind damage on ridge vents and drip edges. Inland-spec vents warp and pull away under gusting wind, letting wind-driven rain into soffits and fascia. We anchor with coastal-rated fastening patterns.
Pricing for Roofing Company in West Los Angeles, CA
A typical roof repair in West Los Angeles runs $350 to $1,200 for targeted work like flashing replacement or tile reset. A coastal-spec roof inspection is $250 to $450. Full roof replacement on a 1,200 to 1,800 square foot single-family home here runs $12,000 to $24,000, depending on whether you have clay tile to reset or flat membrane to tear off. That’s higher than inland quotes, and for a reason: marine-grade underlayment, stainless fasteners, and lifted-tile inspection all cost real money. The cheap spec will leak within a decade. Call (213) 521-8272 for a written, line-item estimate. It’s always free, and it’s always in writing before any work starts.
We Also Serve Cities Near West Los Angeles
While this page is built for homeowners in West Los Angeles, our crews also take calls from Los Angeles, Burbank, South Gate, and Lynwood. The coastal-spec material notes above apply to most of those cities too, especially anywhere within five miles of the marine layer.
Serving West Los Angeles, CA - Our Local Coverage Area
We’re based in the West Los Angeles 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 West Los Angeles
Salt air corrodes the galvanized nails, fasteners, and flashing that hold clay tile in place, causing tiles to loosen and leak far faster than inland roofs. Inland galvanized hardware can last 20 years or more; on a West LA Spanish Colonial within a mile of the coast, we routinely see failure in 5 to 7. That’s why coastal-spec roofs use stainless or hot-dip galvanized hardware. Call (213) 521-8272 for an inspection that checks what’s holding your tile on, not just how the tile looks.
Expect to pay 8 to 15 percent more for a coastal-spec roof in West Los Angeles. On a $18,000 full replacement, that’s roughly $1,400 to $2,700 extra for marine-grade underlayment, stainless fasteners, and sealed flashing joints. The alternative, an inland-spec roof, typically leaks within a decade and costs far more to repair than the upfront savings. We’ll show you both numbers in writing before you decide. Call (213) 521-8272 for a free quote.
Because the underlayment beneath the tile has failed. Original 1920s felt underlayment, hidden under intact-looking clay tiles on West LA’s Spanish and Tudor homes, degrades from age and salt air until it turns to dust. The tiles still shed water, but once the underlayment is gone, water reaches the decking and leaks into the house. Surface inspections miss this every time. We lift tiles to check. Call (213) 521-8272 to schedule a lift-and-inspect.
Santa Ana gusts warp and peel inland-spec ridge vents and drip edges, opening gaps that let wind-driven rain into soffits, fascia, and the roof deck. Flat roofs are especially vulnerable because any uplift at the edge pulls the membrane seam apart. Coastal-rated anchoring and heavier-gauge edge metal prevent this. If your flat roof has loose drip edge after the Santa Anas, call (213) 521-8272 for a repair quote.
Look for three line items: marine-grade or synthetic underlayment, stainless or hot-dip galvanized fasteners, and sealed flashing joints. If a quote just says “underlayment,” “nails,” and “flashing” without a spec, it’s likely priced for inland conditions. A West LA roof needs the coastal spec. We include it by default on every job. Call (213) 521-8272 and we’ll walk through the line items on the phone.
Written by Grant Whitlock, Owner at Mercer Roofing Co Los Angeles, serving West Los Angeles since our founding in 2000.
Ready for a straight answer in writing? Call (213) 521-8272 now. A live person answers, and your estimate is free.