Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roof Installation Across Lomita
A full roof installation in Lomita typically runs $11,500 – $24,000 for a standard single-story ranch, with most jobs completed in 3 – 7 working days once materials land. That price range reflects two roof systems on one permit more often than not here, because the 1945 – 1965 ranch stock around Lomita frequently carries a pitched shingle field plus a low-slope or flat section over the garage or rear addition. We know this because we’ve torn off enough of them off Lomita Boulevard, 250th Street, and the blocks around Eshelman Avenue to see the pattern repeat. Call (743) 200-8347 for a written quote before any work starts.
Why Mercer Roofing Is Lomita’s Preferred Roof Installation Company
Lomita runs its own building department, separate from LA County and LA City. That single fact trips up roofing crews who work the wider South Bay and pull the county permit out of habit. We pull the City of Lomita permit, in the right sequence, every time. Homeowners here tell us the same thing: they want a roofer who knows the difference between a City of Lomita permit and an LA County one before the dumpster shows up, not after an inspection stalls.
We’re part of the Threshold Group family, founded in 2000, which means every technician we send to a Lomita home is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge. We send the technician’s name and photo to you before they ring the bell. That’s the Threshold Standard, and it’s non-negotiable on every visit. Grant Whitlock leads our team, and he reviews every Lomita roof installation quote before it goes out.
Lomita is small, roughly two square miles. We can get a crew to any address in the city quickly, from the neighborhoods near Lomita Park to the streets running up toward the Palos Verdes foothills. Small lots mean tight staging. We plan for that before the first nail is driven.
TPO Roofing Installation in Lomita
TPO Roofing Installation in Lomita is the fix we recommend for the flat and low-slope sections that so many 1945 – 1965 ranch homes carry over their attached garages and rear room additions. TPO, or thermoplastic polyolefin, is a white single-ply membrane that gets heat-welded at the seams. It reflects sun, sheds water, and handles the South Bay marine layer better than the old torch-down modified bitumen that was slapped on these sections in the 1980s. A TPO section over a typical Lomita two-car garage runs $5,500 – $9,500, depending on decking condition and transitions to the main roof.
Garage and Addition Transition Work
The weak point on almost every mixed roof in Lomita is the seam where a steep shingle plane meets a low-slope section. We install new flashing, drip edge, and ice and water shield at that transition, then run the TPO up the wall or under the shingle course so rain driving off the main roof can’t get behind the membrane. Most of the leak callbacks we see from other installers start right there.
Why a Shingle-Only Quote Misses It
None of this matters if the installer never looks at the flat section. On a 1958 ranch off 250th Street near Rolling Hills Estates, our tech tore off the original pitch field and found the attached-garage flat section had been torch-down modified bitumen from the 1980s, failing at the seam where it tied into the main roof. We installed GAF architectural shingles on the steep plane, transitioned to TPO on the flat, and pulled the City of Lomita permit before the dumpster ever landed. That’s how a Lomita roof installation should be scoped.
Shingle Roof in Lomita
Shingle Roof work in Lomita means re-covering the main pitched field on homes that were mostly built between 1945 and 1965, many on their second or third re-roof. A standard single-story ranch here runs $9,000 – $16,000 for a full tear-off and architectural shingle install, depending on square footage, decking replacement, and valley count. Some roofs have been overlaid once or twice already, and when they fail now, the decking underneath often needs repair from decades of marine-layer damp.
Shingle Selection for the Marine Layer
Lomita sits five to seven miles from the Pacific, deep enough inland to avoid raw salt spray but still under the marine layer for much of the year. That keeps shingle surfaces damp and cool, which accelerates algae streaking and granule loss faster than in drier cities to the east like Carson. We lean toward architectural shingles from GAF, CertainTeed, and Owens Corning with good granule adhesion and algae-resistance ratings. We stock the most common colors locally so a Lomita roof doesn’t wait on a warehouse order.
Decking and Code Requirements
City of Lomita inspectors check decking condition, underlayment, and nailing patterns. We don’t shortcut any of it. If the decking is soft from decades of moisture exposure, we price the replacement into the quote up front, in writing, so the number doesn’t move once the tear-off exposes what’s underneath.
Trusted Brands We Service in Lomita
We install and service shingle roofs from GAF, CertainTeed, Owens Corning, IKO, Atlas, and Tamko, and we carry local stock for the most common Lomita colorways so turnaround stays short. For flat and low-slope sections, we install TPO and other single-ply membranes, and we work with manufacturer warranty requirements so the coverage actually holds. If you have a warranty on an existing Atlas or GAF roof and need a re-roof, we’ll tell you what’s covered and what isn’t before you sign anything. Call (743) 200-8347 and a live person answers, day or night.
Common Roof Installation Problems We See in Lomita Homes
- Wrong permit type stalls the job. Lomita issues its own permits through the City of Lomita building department. A roofer who pulls an LA County or LA City permit gets flagged, and the inspection sequence stops until it’s corrected.
- The flat garage section gets skipped. Re-shingling only the main pitched field and leaving the 1980s modified bitumen over the garage untouched is the most common mistake we find. That flat section is where the leaks actually start.
- Missing ice and water shield at transitions. The low-slope-to-pitch transition and valleys on these ranch homes take the brunt of winter coastal-plain rain. Without ice and water shield there, water driven under the flashing migrates into the interior before anyone notices.
- Tight lots limit staging. Lomita’s small, closely packed lots leave little room for dumpsters and material drops. We plan the staging layout before day one so the crew isn’t working around a driveway full of shingles.
Pricing for Roof Installation in Lomita, CA
A complete roof installation on a typical Lomita ranch runs between $11,500 and $24,000. Shingle-only re-roofs start around $9,000. TPO or flat-section work adds $5,500 to $9,500 depending on size and decking condition. What moves the number: decking replacement, the amount of ice and water shield required at valleys and transitions, the number of roof planes, and whether the flat section over the garage or addition is included in the scope. We write every quote so you see the line items before work starts, and the number doesn’t change unless you approve a change order in writing. Call (743) 200-8347 for a free estimate.
| Scope | Typical Lomita Range |
|---|---|
| Shingle tear-off and re-roof, single-story ranch | $9,000 – $16,000 |
| Complete installation, pitched + flat sections | $11,500 – $24,000 |
| TPO flat section over garage or addition | $5,500 – $9,500 |
| Decking replacement (per sheet) | $75 – $120 |
We Also Serve Cities Near Lomita
Our Roof Installation crews cover Lomita and the surrounding South Bay, including Lakewood, Torrance, Carson, and Rancho Palos Verdes. If you’re in one of those cities, the same written-pricing and Threshold Verified standards apply. Call (743) 200-8347 to schedule.
Serving Lomita, CA - Our Local Coverage Area
We’re based in the Lomita 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 Lomita
We pull permits through the City of Lomita building department, never LA County or LA City. Lomita operates its own independent permitting and inspection process, and we sequence the permit so the inspection never stalls. Call (743) 200-8347 and we’ll walk you through what the city requires for your address.
Yes, it’s included in our quote, and we flag it explicitly in the line items. If the flat section has 1980s torch-down that’s failing at the seams, we price a TPO replacement rather than leaving the home’s most leak-prone area untouched. Any quote we write for a Lomita ranch covers the full roof, not just the pitched field. Call (743) 200-8347 for a written quote that includes your flat section.
The persistent marine layer keeps Lomita roof surfaces damp and cool for much of the year, which accelerates algae streaking and granule loss on asphalt shingles faster than drier inland cities. We recommend architectural shingles with strong granule adhesion and algae-resistance ratings, and we carry common Lomita colorways locally so lead time stays short. Call (743) 200-8347 and we’ll tell you which brands hold up best on your street.
Yes, we do it regularly. Most Lomita homes sit on small lots with limited staging space for dumpsters and material drops, so we plan the staging layout before day one and keep the crew sized for the space. We’ll tell you exactly where the dumpster goes and how materials get moved without blocking your driveway or your neighbor’s. Call (743) 200-8347 and we’ll come look at your lot.
A square is 100 square feet of roof surface, and it’s the standard unit roofers use to price shingle tear-off and installation. When your quote says 18 squares, that means 1,800 square feet of roof plane. We line-item every square on the quote so you can measure against your own roof. Call (743) 200-8347 for a quote that spells all of this out in plain English.
Get a Written Roof Installation Quote in Lomita
If you live in Lomita and you’re looking at a re-roof on an aging ranch home, the first step is a written quote that covers the pitched field and the flat section in the same scope. We’ll send you a technician’s name and photo before they arrive, they’ll badge in at the door with a photo ID, and every price and guarantee gets put in writing before a single nail is driven. That’s how Mercer Roofing does Roof Installation in Lomita. Call (743) 200-8347 to schedule your free estimate.
Written by Grant Whitlock, Owner at Mercer Roofing, part of the Threshold Group family since 2000.