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 Alondra Park
Roof repair in Alondra Park comes down to one thing: knowing what the salt air does to the parts of a roof nobody sees. Most roofers walk up, look at shingles, quote a price. We start with the drip edge and the flashing, because in this neighborhood that’s where the damage starts. The marine layer rolling in off the coast keeps north-facing slopes damp for hours after the sun burns off the rest of Alondra Park, and that changes which repairs actually matter. Call (213) 521-8272 and we’ll tell you what’s failing on your roof, in plain English, before anyone climbs a ladder.
Why Mercer Roofing Co Los Angeles Is Alondra Park’s Preferred Roof Repair Company
Homeowners in Alondra Park call us because we solve the problem most roofers ignore: the stranger at the door. Before any of our technicians arrive, you get their name and photo sent to you. They’ll show up in a marked uniform, present a photo ID badge at the door, and only then start work. That’s the Threshold Standard, and every tech we send into Alondra Park is background-checked, identity-verified, and held to it.
We were founded in 2000 and we’re part of the Threshold Group family. Grant Whitlock leads our team, and he’s built our reputation on written prices given before work starts and written guarantees on every repair. No surprises on the invoice. Ever. The 365-Day Done Right Promise means if it’s not right within a year, we make it right. Period.
Alondra Park has its own roofing personality. The mix of 1950s ranch homes with low-slope built-up roofs and newer stucco homes with tile means we shift between flat roof patching and tile repair on the same street. Our crews know the difference between marine-layer rot and ordinary wear, and we write our estimates accordingly.
Styles & brands we work with
Metal Roof Repair in Alondra Park
Metal Roof Repair in Alondra Park usually means fixing what holds the metal down, not the panels themselves. The constant salt-air moisture from the coast corrodes fasteners, drip edge, and flashing long before the metal panels show visible wear. A typical fastener replacement and re-seal job runs $450 – $900 depending on roof size and access.
Fastener and Seal Replacement
When we walk a metal roof in Alondra Park, we check the gaskets on every exposed fastener. Those neoprene washers crack and shrink within a decade here. Once they fail, water follows the screw shaft down into the decking. We replace them with stainless steel screws and marine-grade gaskets before re-sealing the seams.
Corroded Edge and Flashing Repair
Drip edge and penetration flashing on metal roofs in Alondra Park fail within 15 years even when the panels look fine. Salt air eats galvanized steel from the edge inward. We cut out the corroded sections and install heavier-gauge replacement, then repaint to match. The job typically runs $300 – $700 per section, depending on length.
Commercial Roof Repair in Alondra Park
Commercial Roof Repair in Alondra Park works differently than residential. We’re handling flat or very low-slope roofs on buildings around the commercial strips off Alondra Boulevard, where roof drains and HVAC penetrations carry the same salt-air load as the houses. A standard commercial patch and reseal runs $1,200 – $3,500 depending on square footage and the number of penetrations.
Flat Roof Leak and Ponding Repair
Built-up and modified bitumen roofs in Alondra Park tend to pond after heavy winter rain, and that standing water works into every seam. We trace the leak to its source, not just the wet spot on the ceiling below, then patch with a torch-down or cold-applied system matched to your existing roof. We also correct low spots so the water drains instead of sitting there.
Penetration and Flashing Maintenance
Every HVAC unit, pipe boot, and drain on a commercial roof is a potential entry point. Salt air accelerates the corrosion of all of them. Our maintenance visits include re-sealing every penetration and replacing any flashing that shows pitting. We’ll give you a written list of what we found and what we recommend, with prices, so you can plan.
Trusted Brands We Service in Alondra Park
We install and repair using manufacturer-recognized shingle brands, and for Alondra Park’s patch of salt air and damp mornings, we often specify GAF architectural shingles for their wind rating and algae resistance. For homeowners asking about tile or built-up systems, we also work with Boral and Atlas products. We keep common replacement parts and flashing stock on our trucks, which means fewer return trips and a faster repair when you’re waiting on a tarp.
See the difference
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AfterCommon Roof Repair Problems We See in Alondra Park Homes
- North-facing moss and algae concentration. Alondra Park’s persistent marine layer means north-facing roof planes stay damp long after south-facing slopes dry, so moss grows on one side and not the other. That shaded side is where underlayment and flashing fail first, and we prioritize those planes in every inspection.
- Corroded drip edge and flashing. Salt air from nearby beaches eats galvanized drip edge within 15 years, even when the shingles above it look fine. We see roofs in Alondra Park where the shingles are sound but the roof leaks because the edges rusted away.
- Attic ventilation rot. The 1950s-1970s ranch homes around Alondra Park’s namesake community often have original composition shingles and barely any attic airflow. Marine-layer humidity settles in and rots decking from below, loosening shingle fasteners until shingles start sliding.
- Transition failures on dual-roof homes. Homes where a flat built-up roof meets a pitched shingle or tile section leak most at the transition. The change in materials creates a seam that salt air works into, and by the time water shows inside, the flashing underneath is usually gone.
Pricing for Roof Repair in Alondra Park, CA
A typical shingle replacement on a small section of roof in Alondra Park runs $350 – $800. Flashing repair runs $250 – $650. A full leak trace and repair runs $400 – $1,200 depending on how far we have to chase the water. Metal roof fastener replacement runs $450 – $900. Flat roof patching runs $350 – $900 for residential, $1,200 – $3,500 for commercial. What moves the number is roof pitch, access, how much decking needs replacement, and whether we’re repairing to coastal spec or just getting you watertight. We quote both so you decide. Call (213) 521-8272 and we’ll give you a written price before any work starts. Always.
We Also Serve Cities Near Alondra Park
Our Roof Repair crews cover Alondra Park and the neighboring communities of Alondra Park, plus Los Angeles, Burbank, South Gate, and Lynwood. If you’re nearby and dealing with a leak, call us.
Serving Alondra Park, CA - Our Local Coverage Area
We’re based in the Alondra Park 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 Alondra Park
North-facing roofs in Alondra Park stay damp for hours after the sun dries the south side, because the marine layer blocks morning sun while north slopes never get direct afternoon sun at all. That constant moisture feeds moss and algae, which trap water against the underlayment and cause rot that spreads under the shingles. South-facing slopes dry out and last longer. When we inspect an Alondra Park roof, we look hardest at the north side. Call (213) 521-8272 for a free estimate that accounts for your roof’s actual exposure.
Salt air corrodes galvanized drip edge, flashing, and fasteners from the outside in, which is why these components fail within 15 years in Alondra Park even when the shingles look fine. We specify stainless steel or heavier-gauge coated flashing and fasteners for coastal repairs, because the standard inland hardware simply rusts through here.
A coastal-spec repair uses stainless fasteners, marine-grade sealants, and heavier-gauge flashing designed to survive salt air; an inland-spec repair uses the standard galvanized parts that cost less up front. The price gap is usually 15 – 25% more for coastal spec, but the inland version starts rusting within a decade and you pay for the same repair twice. Call (213) 521-8272 for a written quote on both options.
Look for soft spots when you walk the roof, bubbling or blistering in the top layer, standing water that lasts more than 48 hours after rain, and peeling paint or water stains where the roof meets exterior walls. If you see any of those on a low-slope built-up roof in Alondra Park, the decking underneath may already be rotting from trapped moisture.
Underlayment replacement is the repair that actually stops leaks on clay tile roofs in Alondra Park, because the underlayment beneath the tiles breaks down from persistent moisture long before the tiles themselves fail. Replacing only cracked tiles leaves the real problem in place, and the leak comes back. The tile is just armor; the underlayment is the waterproof layer.
Written by Grant Whitlock, Owner at Mercer Roofing Co Los Angeles, serving Alondra Park since 2000.