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 Installation Across San Pedro
A new roof in San Pedro typically runs $11,500 to $28,000 for a standard composition shingle home, and $18,000 to $45,000 for standing seam metal or tile, depending on pitch, decking condition, and the coastal-spec materials this neighborhood genuinely requires. We’re Mercer Roofing Co Torrance, and our crews work on San Pedro rooftops every week, from the Craftsman bungalows near Pacific Avenue to the hillside homes above Western Avenue. The salt air here changes what belongs on your roof, and we’d rather tell you that before you sign an inland-spec quote that fails early. Call (424) 435-5428 for a free estimate that accounts for the real conditions on your street.
Why Mercer Roofing Co Torrance Is San Pedro’s Preferred Roof Installation Company
San Pedro homeowners call us because we explain the difference between a roof that survives here and one that doesn’t. The marine layer, the salt spray, the wind off the channel – these aren’t footnotes. They determine whether your flashing lasts eight years or twenty-five.
Our owner, Grant Whitlock, holds every project to the Threshold Verified standard: background-checked technicians, photo ID badges at the door, and a written price before any work begins. You’ll know the name and face of the person arriving before they ring the bell. If you’re home alone, or your kids are napping, or you’ve had one too many strangers knock unannounced, that matters.
We’re part of the Threshold Group family, founded in 2000. Each location is independently owned and operated, and our San Pedro customers get the same written guarantee on every repair and the same Roof Installation standards we’d put on our own homes. No voicemail. A live person answers 24/7.
Styles & brands we work with
Standing Seam Metal Roof in San Pedro
Standing seam metal roof installation in San Pedro is the most durable answer to salt air, and it’s the system we recommend first for hillside homes that catch the brunt of ocean wind. The panels interlock vertically with concealed fasteners, which means the metal that holds your roof down never sits exposed to corrosion. A standing seam job here typically runs $22,000 to $45,000 based on roof size, pitch, and whether we’re tearing off old layers or installing over a clean deck.
For San Pedro specifically, we specify Kynar 500 or Hylar 5000 coated steel or aluminum, not standard Galvalume that pits after a decade of salt exposure. The difference in material cost is real, roughly $1.50 to $3.00 more per square foot, but the coastal-spec panel lasts two to three times longer here.
Marine-Grade Fasteners and Clips
Standard roofing screws with zinc heads will show rust streaks within three years on a San Pedro metal roof. We use stainless steel clips and fasteners rated for continuous salt exposure. Every clip is tested for wind uplift because the gusts coming up the Palos Verdes slope hit harder than anything in Torrance or Carson.
Ridge and Hip Details Near the Ocean
The ridge caps on metal roofs above Western Avenue take a punishing amount of salt spray. We seal those joints with a marine-grade polyurethane, never standard silicone, and we add extra closure strips at the eaves to keep wind-driven rain from crawling under the panels.
Tile Roof in San Pedro
Tile roof installation in San Pedro gives you the classic Spanish Colonial look that matches so many homes in the older central neighborhoods, and it handles salt air better than composition shingle. A tile roof here costs $18,000 to $38,000 including underlayment replacement, but the underlayment choice matters more than the tile itself. We install a two-ply modified bitumen or synthetic underlayment rated for high humidity and salt exposure, because the tile sheds water while the underlayment does the real waterproofing.
Tile is heavy. Some of the 1920s and 1930s homes near Point Fermin and the Arts District need a structural check before tile goes on, and we’ll tell you that honestly instead of finding out mid-project.
Flashing and Valley Work on Tile
The valleys on a tile roof in San Pedro need hot-dip galvanized or stainless steel valley metal, never standard galvanized. Salt spray concentrates in the valleys, and we’ve pulled out valley metal from local homes that crumbled in our hands after eight years. We install the heavier gauge, and we seal every tile-to-flashing transition with marine-grade sealant.
Underlayment Under Ocean Fog
The marine layer sits on San Pedro roofs for hours each morning, especially in the summer. Standard felt underlayment absorbs that moisture and degrades. We use synthetic underlayments that don’t wick water, plus extra ice and water shield at eaves and valleys on north-facing planes where moss growth is worst.
Trusted Brands We Service in San Pedro
We install and repair roofs using manufacturer-recognized shingle brands including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For San Pedro homes, we lean on Owens Corning Duration and IKO Dynasty lines for their algae resistance, which matters on north-facing planes that stay damp under the fog. We stock local parts for San Pedro jobs and can get specialty coastal-spec materials within days, not weeks. If you’re comparing quotes, ask your roofer which brand and which specific product line they’re specifying, not just which brand they’ve heard of.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Installation Problems We See in San Pedro Homes
- Corroded flashing at chimneys and skylights. Standard galvanized flashing lasts about 6-10 years within a mile of the water before the salt eats pinholes through it. We replace it with hot-dip galvanized or stainless steel during every roof installation we do in San Pedro.
- Ridge caps losing their sealant. Acrylic and silicone caulk break down in a couple of years under constant salt spray. We use marine-grade polyurethane on all ridge and hip caps because that’s what actually holds up here.
- Moss and lichen on north-facing planes. The fog keeps those shingles damp for hours every morning, and the moss holds water against the roof deck. We add algae-resistant shingles and improve attic ventilation so the deck dries out from below.
- Wind-driven rain at the eaves. Homes on the terraced hillsides and bluffs get vertical rain that finds its way under standard drip edge. We extend ice and water shield past the exterior wall line at the eaves and valleys on every coastal job.
Pricing for Roof Installation in San Pedro, CA
A full composition shingle replacement on a typical San Pedro home runs $11,500 to $20,000 depending on square footage and decking repairs. Standing seam metal runs $22,000 to $45,000, and tile runs $18,000 to $38,000. The coastal-spec materials we use, stainless nails, hot-dip flashing, marine-grade sealant, upgraded underlayment, typically add $800 to $2,500 to a job versus an inland-spec quote. That’s the price gap you should be asking about. The cheap spec costs more within a decade, because you’ll be replacing rusted flashing and lifting shingles long before the roof itself wears out. Call (424) 435-5428 for a written line-item quote. Every estimate is free, and no work starts without a written price first.
We Also Serve Cities Near San Pedro
Our crews cover San Pedro and the surrounding communities, including Rancho Palos Verdes, Carson, Torrance, and Signal Hill. The coastal-spec details change from one city to the next, and we price each job based on the actual conditions at your address, not a regional map. If you’re in any of these cities, the same Threshold Verified standard applies.
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 Roof Installation in San Pedro
San Pedro’s salt-laden ocean air corrodes standard electroplated galvanized roofing nails within 5 to 10 years, causing nail heads to rust off and shingles to slide. We specify stainless steel ring-shank nails or hot-dip galvanized fasteners on every roof installation in San Pedro because the extra $300 to $800 in materials prevents a full re-nail later. Call (424) 435-5428 to get an exact quote for your roof.
We install algae-resistant shingles like Owens Corning Duration or IKO Dynasty, improve attic ventilation so the deck dries from below, and add zinc or copper strips at the ridge where growth is worst. We also specify a synthetic underlayment that won’t wick moisture like felt does. This is a standard part of our San Pedro roof installations, not an add-on.
We use a marine-grade polyurethane caulk, not standard silicone or acrylic. The salt spray along San Pedro’s coast breaks down ordinary sealants within two years, letting wind-driven rain get under the ridge caps. Marine-grade polyurethane holds up for a decade or more in the same conditions.
Yes. The homes above Western Avenue catch the strongest ocean wind and the heaviest salt spray, so we add extra closures at the eaves, use stainless hardware throughout, and often spec a heavier shingle with a higher wind rating. We also extend ice and water shield further up the eaves because rain there comes in horizontally.
The marine layer keeps roof decks damp for hours every morning, especially on north-facing planes. That moisture degrades standard felt underlayment faster and accelerates rot. We install synthetic underlayment that doesn’t absorb water, plus self-adhered ice and water shield at eaves, valleys, and around penetrations on every San Pedro job. Call (424) 435-5428 and we’ll walk you through exactly what your roof needs.
Written by Grant Whitlock, Owner at Mercer Roofing Co Torrance, serving San Pedro and the surrounding coastal communities.