Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Installation Across Florence-Graham
A full roof installation in Florence-Graham typically runs $9,800 to $22,400 depending on roof size, pitch, tear-off layers, and whether the decking underneath needs replacement. Most projects take 3 to 7 working days from tear-off to final inspection. If your roof is past 20 years old or you see granules in the gutters, curling shingles, or daylight in the attic, call Mercer Roofing at (743) 200-8347 and we’ll send a background-checked, photo-badged technician to walk it with you before you spend a dollar.
Florence-Graham homes are not like homes in nearby incorporated cities. LA County Building and Safety, not a city hall, controls every permit and inspection here, and that changes how a roof job gets priced, scoped, and signed off. We know the county inspectors who work this corridor, we know what they flag, and we write our quotes so you’re never blindsided by a code requirement you didn’t know existed.
Why Mercer Roofing Is Florence-Graham’s Preferred Roof Installation Company
Homeowners in Florence-Graham call us because we do one thing most roofing companies won’t: we tell you exactly who is coming to your door before they arrive. Every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard. You get the tech’s name and photo sent to you ahead of the visit. When they knock, they’re in a clean, marked uniform and they hand you a photo ID badge. No exceptions, no exceptions on the exception.
Grant Whitlock leads our crews, and he’s personally walked roofs along Compton Avenue, near the Slauson corridor, and through the residential blocks east of Alameda Street. What he’s learned is that Florence-Graham roofs rarely give you a simple tear-off. They give you history: layered shingles over original decking, rear additions that were never permitted, and low-slope sections that have been fighting thermal cycling for sixty years. We plan for that before we start, which is why our quotes hold.
Every job begins with a written price. Not a verbal estimate, not a “we’ll see when we get up there.” A line-item quote in writing. Every repair carries a 365-day written guarantee. If it fails within the year, we come back and fix it free. That’s the Roof Installation standard we bring to every home in this community.
Shingle Roof in Florence-Graham
A shingle roof in Florence-Graham is the most common system we install, and for good reason: it handles the sun load here better than most alternatives when installed correctly, and it’s the most budget-friendly option for the small post-WWII bungalows and duplexes that dominate the housing stock. Expect to pay $9,800 to $16,400 for a full tear-off and architectural shingle install on a typical 1,100 to 1,600 square foot home, depending on the number of layers we’re tearing off and whether decking needs replacing.
Shingle installation on these older homes almost always means more than shingles. We’re replacing rotted decking, flashing, and underlayment, and we’re doing it under a county permit with inspections at every required stage. It takes a bit longer than a cosmetic overlay, but it means the roof actually sheds water for the next 25 to 30 years instead of trapping it.
What Tear-Off Actually Involves Here
A Florence-Graham bungalow from the late 1940s or 1950s rarely has one layer of roofing. It has four, sometimes six, layers of asphalt stacked over original 1×6 wood decking. Each layer adds weight and traps moisture against the sheathing below. By the time we strip it, the decking is often swollen, split, or starting to delaminate.
How We Handle Decking Replacement
Decking replacement is the most common change order on a Florence-Graham roof install. We inspect the attic before we quote, and when we find suspect sheathing, we write a decking allowance into the contract price. If the tear-off reveals more rot than we could see from below, we photograph it, show you exactly what’s there, and get your written approval on the added scope before we order a single sheet of plywood.
Standing Seam Metal Roof in Florence-Graham
A standing seam metal roof in Florence-Graham runs $18,000 to $22,400 on a standard bungalow or duplex, and it’s increasingly the choice for homeowners who don’t want to think about their roof again for 40 to 50 years. The urban heat island effect here is real: dense pavement, minimal tree canopy, and industrial surroundings push ambient temperatures several degrees above coastal LA. That heat accelerates UV degradation on asphalt shingles. Metal reflects it.
Standing seam installs carry a higher upfront cost, but for the low-slope and nearly flat roofs common in this community, the performance difference is substantial. The panels interlock vertically, which means fewer horizontal seams where wind-driven rain can get under the roofing. During Santa Ana events, that matters.
Edge Flashing and Santa Ana Uplift
Santa Ana winds stress fascia and edge flashing on these low-slope roofs every fall. A drip edge that wasn’t re-secured to spec becomes the first thing the wind peels back. On standing seam installs in Florence-Graham, we pay particular attention to edge details, using continuous cleats and locking the panels to code before the inspector walks the roof.
When Metal Makes More Sense Than Shingle
If your home has a nearly flat roof with a history of ponding water, or if you’re tired of replacing shingles every 15 years, standing seam metal is worth the conversation. We’ll give you a written, line-item quote for both systems so you can compare actual costs instead of guesses. Call (743) 200-8347 and we’ll walk the roof with you.
Trusted Brands We Service in Florence-Graham
Mercer Roofing installs and repairs using manufacturer-recognized shingle brands including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. We stock common GAF and Atlas architectural shingle profiles for quick turnaround on Florence-Graham jobs, along with Tamko underlayment and edge flashing matched to what’s already on most bungalows in the area. That means we’re not ordering every component from a warehouse two days out. We’re loading the truck from local stock, and we’re on your roof the day your job is scheduled. For standing seam work, we order panels cut to your roof’s exact dimensions, and we verify the measurements against the county-approved plans before fabrication.
Common Roof Installation Problems We See in Florence-Graham Homes
- Layered roofs hiding structural rot. Four to six layers of asphalt over original wood decking is common on 1940s-to-1960s bungalows here. The weight and trapped moisture mean the decking and underlayment have already failed by the time the tear-off reaches them.
- Unpermitted rear additions creating mismatched roof-to-addition junctions. We routinely find sheathing grades that don’t match the original structure, framing that was never inspected, and rooflines that don’t form correct valleys or flashing details. When a full re-roof triggers permit review for the first time in 40 years, these issues have to be disclosed to LA County Building and Safety.
- Thermal cycling and Santa Ana wind uplift on low-slope edge details. Ambient temperatures in Florence-Graham run above coastal LA, so fascia and edge flashing degrade faster. The first strong wind event peels back a drip edge that wasn’t re-secured to spec.
- Original 1×6 wood decking that’s swollen and split. Interior spans between rafters on postwar bungalows weren’t designed for modern shingle loads. We often replace decking with rated plywood to meet current code before laying new underlayment.
Pricing for Roof Installation in Florence-Graham, CA
Here’s what you can expect to pay for a full roof installation in this market. A standard shingle tear-off and re-roof on a 1,100 to 1,600 square foot bungalow runs $9,800 to $16,400. Standing seam metal on the same footprint runs $18,000 to $22,400. Decking replacement adds $2.50 to $3.80 per square foot of affected roof area, which is why we write a decking allowance into every contract. If the tear-off reveals rot we couldn’t see from the attic, we show you photos, give you a written change order, and get your approval before we spend a dollar. No hidden material markups, no end-of-job surprises. Call (743) 200-8347 for a free, written estimate on your Florence-Graham home.
We Also Serve Cities Near Florence-Graham
Our crews regularly work across the metro area, including Los Angeles, San Diego, San Jose, and San Francisco. If you’re in Florence-Graham or a surrounding community, the same written-price and badge-at-the-door standard applies. Call us and we’ll confirm coverage for your exact block.
Serving Florence-Graham, CA - Our Local Coverage Area
We’re based in the Florence-Graham 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 Florence-Graham
The county does. Florence-Graham is an unincorporated community governed by LA County, so every permit, inspection, and code enforcement action runs through LA County Building and Safety, not a municipal department. That’s different from neighboring incorporated cities like South Gate or Huntington Park, and it’s the biggest reason you should hire a roofer who knows the county’s process. We do. Call (743) 200-8347 and we’ll explain exactly what the permit will require for your roof.
Because what’s under your shingles was never visible when the quote was written. On older bungalows here, we often find rotted decking, failed underlayment, and framing that was never inspected. The honest way to handle that is a written decking allowance in the contract, so the quote changes only by a known, pre-agreed amount, and only after you approve the change order in writing with photos in hand. That’s how we work.
The addition gets reviewed for the first time, and any roof-to-addition junction work must be brought to current code. We document what’s there, install correct valleys and flashing where the rooflines meet, and work with the county inspector so the final sign-off covers the full roof, not just the original footprint. It’s the only way to end up with a clean final inspection. Start that conversation by calling (743) 200-8347.
Yes. The urban heat island effect accelerates UV degradation on asphalt, and Santa Ana winds put recurring uplift stress on edge flashing. For low-slope roofs on older Florence-Graham homes, we lean toward architectural shingles with reinforced drip edge, or standing seam metal if the homeowner wants a 40-to-50-year solution. We’ll quote both in writing so you’re comparing real numbers.
Line-item them. Same shingle brand and grade, same decking allowance, same underlayment, same flashing details, and same permit scope. If one bid lacks a decking allowance, the price is almost certainly going to move after tear-off. Ask each company whether their crews are background-checked and badge-verified, and whether they’ll put the guarantee in writing for 365 days. Then call (743) 200-8347 and ask us the same questions.
Get Your Written Roof Installation Quote in Florence-Graham
One call does it. You’ll talk to a live person, not a voicemail, at (743) 200-8347. We’ll schedule a walkthrough with a background-checked, photo-badged technician whose name and photo are sent to you before the visit. You’ll receive a written, line-item quote before any work starts, and every repair is covered by our 365-Day Done Right Promise in writing. If it’s not done right within a year, we make it right. That’s the Mercer Roofing standard in Florence-Graham, and it’s been that way since 2000.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Florence-Graham since 2021.