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 San Pedro
Roofing work in San Pedro runs $2,800 to $14,200 for a full replacement and $340 to $1,150 for most repairs, and a live person answers our phone at (424) 435-5428 around the clock. If your roof sits on a hillside above Western Avenue or within a few blocks of the waterfront, the salt air and morning marine layer are already working against your flashing, your ridge caps, and your fasteners. We scope every San Pedro job for coastal corrosion before we quote it, because a roof that would be fine in Torrance can fail here within a couple of years if the wrong materials go on. Grant Whitlock leads our Roofing Company team, and every estimate starts with a written price before any work begins.
Why Mercer Roofing Co Torrance Is San Pedro’s Preferred Roofing Company Company
Our San Pedro customers don’t want a stranger at the door. They want a name, a photo, and a badge. That’s why every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard, which each independently owned location is contractually held to. Before your appointment, we send the technician’s name and photo to your phone. When they arrive in a clean, marked uniform, they present a photo ID badge at the door. No mystery. No “someone’s on the way.” You know exactly who is stepping onto your San Pedro property, and that’s the point.
We’re part of the Threshold Group family, founded in 2000, and our crews serve San Pedro homes from the waterfront up through the terraced hillsides. The 365-Day Done Right Promise applies to every repair we perform: if it’s not right within a year, we make it right. That guarantee is written, not implied, and it’s included with every job. If a repair fails, the second visit is free.
Homeowners in San Pedro’s older neighborhoods – the Craftsman bungalows near Pacific Avenue, the Spanish Colonial Revival homes along the coastal terraces, the mid-century ranch houses above Gaffey Street – tell us the same thing: they’d rather pay a fair price once than risk a cheap fix twice. Our written line-item quotes, fixed pricing with no change orders, and permits pulled and inspections passed mean the number we write down is the number you pay.
Styles & brands we work with






Roof Coating in San Pedro
Roof coating in San Pedro is a protective sealant system applied over an existing roof to extend its life, reflect sun, and – critically here – form a barrier against the salt-laden moisture that the marine layer deposits nearly every morning. Homeowners near Point Fermin, along 25th Street, or anywhere within a mile of the bluffs deal with coastal corrosion that inland neighborhoods never see. A roof coating in San Pedro typically runs $1,900 to $4,800 depending on square footage and how much surface prep the existing roof needs, and it can buy five to ten extra years before a full replacement becomes necessary.
When Coating Makes Sense for Coastal Homes
If your asphalt shingle roof is five to twelve years old and you’re noticing granule loss on north-facing planes, a coating may be the right call before the decking underneath starts to rot. San Pedro’s persistent moss and algae growth on shaded roof planes traps moisture against the shingles, and a coating seals those granules in place while reflecting UV heat. We’re careful to specify coatings rated for marine exposure, because a standard product applied near the coast can peel within eighteen months.
What a Coating Will Not Fix
A coating is not a repair for rotted decking, failed flashing, or structural sag. On hillside homes above Western Avenue, where ocean wind pounds ridge caps and starter strips, we always inspect the underlying fastening before recommending a coating. If the corrosion has already reached the underlayment, coating over it just hides the problem and delays the inevitable – and more expensive – tear-off.
Free Roof Estimate in San Pedro
A free roof estimate in San Pedro gives you a written, line-item price before any work starts, and the quote includes a count of squares, the nailing pattern we’ll use for architectural shingles, and a specific note on any flashing or fastener corrosion we find during the walk. Because San Pedro’s coastal exposure changes what a roof needs, our estimate includes the materials we’d specify for your exact location: marine-grade stainless fasteners, polyurethane sealant rated for salt air, and ice and water shield at the eaves. Expect the estimate to take forty-five minutes to an hour, and expect it in writing.
What We Look For on a San Pedro Walk
Up on the roof, we’re looking for the failure modes this city is known for: galvanized flashing rusted at the valleys, moss colonizing north-facing planes, and ridge caps lifting along the windward side of hillside exposures. We photograph what we find, show it to you, and explain what needs to happen now versus what can wait a season. You decide. We don’t push – we present.
Why the Written Price Matters
Every Mercer Roofing estimate is a fixed number, not a range we can revise once the project starts. No change orders unless you approve a scope change in writing first. We pull permits where the county requires them, and we pass every inspection. If the repair fails within 365 days, we return at no charge and make it right. That’s the written guarantee that comes with every job.
Trusted Brands We Service in San Pedro
We install and repair roofs using manufacturer-recognized shingle brands, including Owens Corning, IKO, and Atlas, and we’re equipped to order the specific product lines those manufacturers rate for coastal exposure. Because San Pedro’s salt air shortens the life of standard flashing and fasteners, we keep marine-grade stainless steel and polyurethane sealants stocked for local jobs, which means less waiting on parts and fewer return trips. Grant Whitlock’s team can match most existing roof profiles in San Pedro’s older neighborhoods, whether that’s a composition shingle on a 1940s bungalow or an architectural shingle on a mid-century ranch above Western.
See the difference
Before
After
Before
After
Before
AfterCommon Roofing Company Problems We See in San Pedro Homes
- Salt-driven flashing corrosion: Galvanized flashing and fasteners corrode within a couple of years in San Pedro’s salt air, leading to leaks around valleys and pipe penetrations. Standard materials that work ten miles inland fail early here, and we specify stainless steel and coastal-rated sealant because of it.
- Marine-layer moss on north planes: The persistent morning fog deposits moisture on shaded roof slopes, and moss and algae take hold fast. That growth holds water against the shingles, accelerating granule loss and eventually rotting the decking underneath.
- Hillside wind at ridge caps: Homes above Western Avenue get the brunt of ocean wind, and ridge caps there often need extra sealing because the constant salt spray eats through standard caulk. When the sealing fails, wind gets under the ridge caps and starts lifting them.
- Aging low-slope roofs on older homes: Many of San Pedro’s pre-1950 Craftsman and Spanish Revival homes were built with low-slope or composition shingle roofs that are now well past their intended service life. Flashing details and underlayment on these roofs are often original, and they fail quietly until water reaches the interior.
Pricing for Roofing Company in San Pedro, CA
A roof repair in San Pedro typically costs $340 to $1,150. A full roof replacement runs $2,800 to $14,200, and the spread comes down to square footage, roof pitch, decking condition, and how much flashing replacement the salt air has made necessary. Roof coatings fall between $1,900 and $4,800. What pushes a San Pedro quote higher than an inland quote: stainless steel fasteners and marine-grade sealants, extra sealing at ridge caps and valleys on windward exposures, and moss treatment on shaded planes. Call (424) 435-5428 and we’ll give you a written price before any work starts. The estimate is free.
We Also Serve Cities Near San Pedro
Our crews work throughout the South Bay and beyond, including Rancho Palos Verdes, Carson, Torrance, and Signal Hill. If your home sits just outside San Pedro, call us at (424) 435-5428 – we’ll let you know quickly whether we cover your street and get you on the schedule. Scheduling and dispatch are coordinated from our Los Angeles office, and crews serve each neighborhood locally.
Serving San Pedro, CA - Our Local Coverage Area
We’re based in the San Pedro 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 San Pedro
San Pedro’s marine layer means higher surface moisture for more hours per day, so we recommend a synthetic underlayment that resists mold and doesn’t absorb water the way old felt does. On low-slope sections and at the eaves, we add ice and water shield as a secondary barrier, because coastal humidity keeps seams damp long after the fog lifts. Call (424) 435-5428 for an exact specification on your roof – estimates are free.
Ridge caps above Western Avenue face direct ocean wind and salt spray, which eats through standard caulk within about two years. Once the caulk fails, wind gets under the ridge cap and starts lifting shingles or the cap itself. We use a polyurethane sealant rated for coastal exposure and stainless steel fasteners on these homes, and we re-seal as part of the job, not as an afterthought.
Yes, roof replacements in unincorporated San Pedro and larger acreage parcels typically require a county permit, and we pull it for you as part of the job. We schedule inspections and stay on site until the roof passes. Written into every estimate is the permit line item, so there’s no surprise fee later. Call (424) 435-5428 and we’ll walk you through what your specific property needs.
Yes. Moss and algae on north-facing San Pedro slopes hold moisture against the shingle surface, which accelerates granule loss and keeps the shingle mat wet long past the morning fog. Over time, the decking under those shingles rots. We treat the affected planes and recommend a coating or replacement depending on how far the damage has gone. A free estimate from (424) 435-5428 will tell you exactly which one your roof needs.
Yes. Every free roof estimate in San Pedro includes a count of squares, the nailing pattern we’ll use for architectural shingles (typically six nails per shingle on coastal windward exposures), plus a line-item breakdown of flashing, underlayment, decking repair, and permits. You get all of it in writing before you decide anything. Call (424) 435-5428 to schedule yours.
Call Mercer Roofing Co Torrance at (424) 435-5428 for a free, written estimate from Grant Whitlock’s team. A live person answers, day or night.
Written by Grant Whitlock, Owner at Mercer Roofing Co Torrance, serving San Pedro since 2000.