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 Repair Across Gardena
Roof repair in Gardena usually runs between $385 and $1,850 for the most common fixes, and most work we schedule is completed within a week of the first call. Gardena’s mix of 1940s-1950s stucco bungalows and 1970s-1980s apartment buildings means we see very different roof problems block to block, which is why we send a technician to look before we ever talk price. Our crews work throughout Gardena from 161st Street up to Rosecrans, and from Vermont Avenue over to Western. If you’ve got a leak, lifted shingles, or flashing that’s pulling away from a vent pipe, call (213) 521-8272 and we’ll get someone out to take a look.
Why Mercer Roofing Co Los Angeles Is Gardena’s Preferred Roof Repair Company
We’ve repaired enough roofs in Gardena to know what the salt air, the Santa Anas, and 70-year-old decking do to a roof system. Our Roof Repair team has worked on the stucco bungalows south of Marine Avenue, the apartment buildings along Western, and the postwar tracts up near El Camino Village. Gardena homeowners call us because we answer the phone with a person, not a menu, and because we send a background-checked technician whose name and photo you receive before he knocks. The tech walks up wearing a clean uniform and a photo ID badge – the Threshold Verified standard – so there’s no guessing who’s at your door. We put a written price in front of you before any work starts, every time. No open-ended estimates, no change orders you didn’t agree to first. And every repair includes a written guarantee backed by our 365-Day Done Right Promise: if the work isn’t right within a year, we make it right at no charge.
Styles & brands we work with
Metal Roof Repair in Gardena
Metal roof repair in Gardena typically costs $450 to $1,200 for panel replacement, seam resealing, or flashing work, depending on the profile and how much of the system has been compromised. Most of the metal roofs we service in Gardena sit on commercial buildings along Redondo Beach Boulevard and the industrial corridors east of the 110, though some of the older Craftsman and Spanish-style homes have metal accents over porches and entryways. The failure we see most often is rust-through at the fasteners – standard electro-galvanized screws and nails simply don’t hold up within six miles of the coast, and Gardena gets enough marine air for it to matter. We replace them with hot-dip galvanized or stainless hardware, then reseal the penetration so water can’t track down the screw threads.
Seam and Fastener Repair
A standing-seam metal roof fails at the seams first. When butyl tape dries out or a seam opens from wind flex, water wicks under the panel and runs along the purlins before it ever shows inside. We inspect every seam on the affected plane, not just the one that’s obviously open, and reseal with a marine-grade butyl specified for coastal exposure.
Panel and Flashing Replacement
When a panel is dented, rusted through, or holed from a fallen branch, patching with sealant is a short-term band-aid at best. We cut back to clean metal, match the panel profile where possible, and replace the flashing at any penetration. If the panel profile is discontinued, we’ll tell you that on the spot and give you an honest range for what full replacement would cost, along with the written quote for the repair.
Commercial Roof Repair in Gardena
Commercial roof repair in Gardena generally runs $700 to $2,800, with the spread driven by whether the building has a flat built-up roof, a modified bitumen overlay, or a single-ply membrane. The 1970s and 1980s apartment buildings scattered along Rosecrans, Marine, and up toward El Camino Village show a pattern we know well: the original built-up roof has alligatored, cracked through at the scuppers, and nobody has added a modern cool-roof topping. That leaves the roof two ways – thermally stressed and UV-baked – and the split happens at the roof drains first, because that’s where water ponds.
Flat Roof Patch and Scupper Repair
A flat roof leak usually starts at a scupper, a drain bowl, or a mechanical curb penetration. Water ponds in the low spot, the membrane flexes, and a crack opens. We clean back the failed layers, dry out the deck where necessary, and build the patch back up with proper reinforcement and a UV-stable top coat. If the underlying deck has rotted, we open it up and re-sheath before the patch goes on. There’s no point putting a new membrane over wet plywood.
Built-Up Roof Repairs and Cool-Roof Topping
Many Gardena apartment owners don’t realize a repair and a compliance upgrade can happen in the same visit. If we’re already on the roof fixing a split at the scupper, adding a white reflective coating to the affected area isn’t a luxury – it slows the UV breakdown that caused the crack in the first place. We’ll tell you honestly whether the whole roof is too far gone for spot work. Sometimes the right answer is a targeted repair now and a budget number for re-roofing later. We won’t sell you a new roof when a patch will hold.
Trusted Brands We Service in Gardena
We repair and install systems from the major shingle manufacturers, and the two brands we work with most often on Gardena homes are GAF and Owens Corning – both hold up well to the sun and occasional wind we get here. For apartment and commercial jobs, we lean on Tamko and Atlas products when the spec calls for a modified bitumen or a self-adhered membrane. Working directly with manufacturer lines means we can get material to Gardena fast without waiting on a regional distributor to restock. It also means the repair gets done with products the manufacturer will actually stand behind, so the warranty means something.
Common Roof Repair Problems We See in Gardena Homes
- Corroded drip edge and fasteners. The salt air that reaches Gardena from the coast attacks electro-galvanized nails and standard zinc-aluminum drip edge within five to seven years. When the drip edge fails, wind gets under the shingle row at the eave and the whole starter strip starts to lift.
- Sagging underlayment over skip sheathing. Pre-1960 Gardena homes were built with 1×6 boards spaced apart, not solid plywood. Roofing felt sags into those gaps over time, water pools in the low spots, and deck rot develops invisibly – no stain on the ceiling until it’s been leaking for a while.
- Flat-roof alligatoring on older apartments. The built-up roofs from the 1970s and 1980s are reaching end of life all over Gardena. We see the same pattern on the apartment stock along Western and Rosecrans: UV-cracked asphalt, split scuppers, and standing water after every good rain.
- Flashing failures at plumbing vents and valleys. The original flashing on a 1950s bungalow was simply roofing tar and a collar that lifted as the house settled. Rain follows the pipe down, and the leak shows up in a bathroom or the kitchen, often far from where the problem actually is. Our techs check the full valley and every penetration, because the visible stain almost never tells the whole story.
See the difference
Before
After
Before
After
Before
AfterPricing for Roof Repair in Gardena, CA
For Gardena, a shingle replacement or leak repair on a single-family home typically lands between $385 and $950. Flashing repair around vents, valleys, or skylights runs $350 to $800. A metal roof seam repair sits in the $450 to $1,200 band, and a flat roof patch or scupper rebuild on a Gardena apartment building starts at $700 and can reach $2,800 depending on membrane type and deck condition. The coastal-spec version of any roof repair – hot-dip galvanized fasteners, marine-grade sealants, proper drip edge – costs 10 to 15 percent more on the front end than the inland-spec job. The reason we recommend it anyway: the inland-spec fasteners rust through in under a decade near the coast, and then you’re paying for the same repair again, plus deck work. Call (213) 521-8272 for a free estimate and a written price before any work starts.
We Also Serve Cities Near Gardena
Mercer Roofing Co Los Angeles handles roof repair across Gardena and the surrounding south LA County communities. If you’re in Gardena, our crews cover the full city. We also take calls from homeowners and apartment owners in Lynwood, South Gate, Bell, and the neighborhoods along the south edge of Los Angeles. Scheduling is coordinated from our Los Angeles office, but the work itself is done by crews who spend their week right here in the South Bay and surrounding area.
Serving Gardena, CA - Our Local Coverage Area
We’re based in the Gardena 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 Repair in Gardena
Because nailing new shingles over warped or splintered 1×6 boards leaves you with a rippled roof and a fast warranty failure. Skip sheathing means the boards are spaced apart, and the spaces cause the underlayment to sag between boards. If those boards are uneven, or if decades of moisture have softened even two or three of them, the nails can’t seat properly. We recommend re-sheathing the affected plane with CDX plywood before installing anything. That’s a step inland crews working in newer tracts may skip entirely – but on a 1948 Gardena bungalow, it’s often the only way to get a flat nailing surface. Call (213) 521-8272 and we’ll tell you honestly whether your deck needs it.
Salt air accelerates rust on electro-galvanized nails and thin zinc-aluminum drip edge, often to the point of failure in five to seven years, so we specify hot-dip galvanized ring-shank nails and heavier-gauge drip edge with a proper corrosion coating. Gardena sits close enough to the coast for it to matter, especially on homes south of Rosecrans. The cheap spec is cheaper for a reason: when the drip edge rusts through, wind gets under the starter strip and your shingles start peeling off. We’d rather spend an extra $40 on fasteners now than rebuild the eave line after the next Santa Ana. We give you the written price either way, but the coastal-spec recommendation is what we’d put on our own roof.
You need a tear-off in almost every case. Wood shake overlays mean there’s an old, brittle shake roof under the shingles or composition material, and repairing over it means hammering into structure we can’t see. The original shakes on a 1950s Gardena home are often split, cupped, or being held together by the overlay’s underlayment. Doing a proper repair means tearing back to the deck so we can inspect it, address any skip sheathing problems, and then install a clean system. It costs more than a patch, but it’s the only way we’ll guarantee the work. We’ll write it up clearly so you know what the first visit costs and what the full reroof would cost.
Because a 1980s built-up roof in Gardena near the 110 has cooked under heat island and UV for four decades, and a house roof in a Torrance tract was built to a different wind and sun profile with different material choices from the start. Your Gardena flat roof likely has alligatoring asphalt, cracked scuppers, and no cool-roof topping, which means any repair we do has to account for thermal movement and standing water. We often add a reflective coating to the repair zone as part of the job, so the patch doesn’t immediately fail the same way. It’s a different failure mode than a shingle roof on a 1980s tract house, and the repair has to be engineered for it.
For a basic shingle repair, no. Title 24 cool-roof requirements apply to new roofing and to certain re-roofing projects, not to spot repairs of a few shingles or a leak. But if our tech is on your roof and sees that a re-roof is on the horizon, we’ll tell you what the compliance path looks like so the eventual replacement is priced right from the start. On the flat-roof side – especially Gardena apartment buildings – cool-roof topping is often required when the roof is substantially replaced. Call (213) 521-8272 and we’ll walk you through what applies to your building specifically.
One More Thing About Older Gardena Roofs
Gardena’s pre-1960 homes often lack true fascia boards. The original 1×6 skip sheathing runs continuously out to form a modest eave line, which means several things. Adding drip edge or gutter aprons requires correcting uneven, splintered decking first, because there’s no clean fascia board to anchor against. We see this on the bungalows around 161st Street, up near the 1400 block, and across much of the pre-war and immediate postwar housing stock. Our crew repaired a 1948 stucco home near 161st Street after heavy Santa Ana gusts peeled back the starter strip on a poorly fastened GAF Timberline roof. Once the failing shingles came off, we found the original 1×6 skip sheathing had only three replacement boards in 70 years, leaving a warped nailing surface. We re-sheathed the affected plane with CDX plywood, swapped all exposed fasteners to hot-dip galvanized ring-shank nails, and reinstalled the GAF system with a sealed ice-and-water shield at the eaves. An inland-spec crew would have simply renailed the same warped deck and called it fixed. That’s the difference between a seven-year patch and a thirty-year fix, and it’s the difference we build into every Gardena repair quote by default.
Written by Grant Whitlock, Owner at Mercer Roofing Co Los Angeles. Call (213) 521-8272 for a free Gardena roof repair estimate and a written price before any work starts.