Architectural shingles
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Costa Mesa
Roof repair in Costa Mesa usually costs $350 – $950 for a targeted fix like flashing or a small leak, while larger repairs involving decking replacement or low-slope membrane work run $1,200 – $3,400. Our crews know the 92626, 92627, and 92628 neighborhoods and typically reach Costa Mesa homes within 24 – 48 hours of your call. The marine layer that rolls in off the coast every morning doesn’t just make June gloomy – it’s quietly corroding the fasteners and flashing on your roof while the shingles still look fine. If you’ve spotted a water stain or curling shingles, call (855) 382-0485 and we’ll send someone out to take a real look.

Why Select Roof Repair Is Costa Mesa’s Preferred Roof Repair Company
Costa Mesa homeowners deal with a roof problem that most Orange County cities don’t. It’s not hail or wind – it’s salt fog. The marine layer sits over the Westside and central tracts all morning, and that moisture works its way under flashing, around vent boots, and into the nail heads holding your decking down. By the time the shingles show wear, the fasteners underneath are often already rusted through. We know to look there first because we’ve opened up hundreds of Costa Mesa roofs and seen exactly that pattern over and over.
Our Costa Mesa customers tend to call us for one of two reasons: a leak they can’t chase down, or a roof that’s 25 – 40 years old and starting to show its age on the low-slope sections. In both cases, the first step is a straight diagnosis, not a sales pitch. A roof inspector who sells shingles by the square will always find shingle problems. We stock and work across seven manufacturer brands, so the recommendation you get from us is about what your roof actually needs – not what’s sitting in our warehouse.
Led by Noel Carrasco, Select Roof Repair is a roofing-only operation. We don’t pour concrete, we don’t remodel kitchens, and we don’t split our attention across six trades. Every job we take in Costa Mesa is a roof job, and that focus shows up in the details: stainless fasteners on coastal homes, correct low-slope membrane selection, and flashings that actually keep water out past the first winter.
Styles & brands we work with






Commercial Roof Repair in Costa Mesa
Commercial Roof Repair in Costa Mesa covers the flat and low-slope systems that dominate the retail strips along Harbor Boulevard, the industrial parks off Baker Street, and the older office buildings scattered through 92626. These buildings run modified bitumen, TPO, or older built-up systems that take a beating from the daily condensation-and-drying cycle the marine layer creates. A commercial repair here typically runs $800 – $2,500 depending on membrane type and penetration count, but full low-slope section replacements on larger buildings can push past $5,000.
Flat Roof Punctuation Repairs
Every pipe boot, HVAC curb, and drain on a Costa Mesa flat roof is a potential leak point. The salt fog settles into the sealant around these penetrations and breaks it down within a few seasons. We strip the old sealant, inspect the flashing, and reset everything with materials matched to the existing membrane so the repair doesn’t create a new problem.
Membrane Patching and Seam Repair
When a low-slope roof starts leaking in Costa Mesa, the seam is usually where it fails. Temperature swings between cool damp mornings and warm afternoons cause the membrane to expand and contract daily, and that movement eventually splits seams and pull corners. A patch is only as good as the substrate beneath it, so we check the decking before any new membrane goes down.
Roof Leak Repair in Costa Mesa
Roof Leak Repair in Costa Mesa almost always starts with a question about flashing, not shingles. On the older 92627 post-and-beam homes especially, the leak you see on the ceiling usually traces back to rusted fasteners or failed sealant at a penetration – a vent pipe, a skylight, a chimney, or the transition where a stucco wall meets the roof. A straightforward flashing repair runs $300 – $600, but when the decking underneath has absorbed decades of salt moisture, the job changes and so does the price – a realistic range for leak repair with decking replacement is $1,200 – $2,800.
Flashing and Vent Boot Repair
Galvanized flashing has a service life of maybe 15 – 20 years in Costa Mesa’s coastal air before rust wins. Vent boots split and crack from constant UV cycling on the warm afternoons. We replace peeling and corroded flashings with stainless or aluminum, not more galvanized, because the next leak costs more than the $8 screw ever did.

Decking and Sheathing Repair
The leak you can see is rarely the whole story. On a 1962 post-and-beam home off Victoria Street in 92627, our crew opened up a leak repair and found the original 1×6 decking was soft and every nail head rusted through from decades of salt fog. We replaced the decking, installed ice and water shield at the low-slope transitions, and reset the flashing with stainless fasteners before any new modified bitumen went down. That’s not an outlier on the Westside – it’s the typical find once we lift the old material.
Trusted Brands We Service in Costa Mesa
We install and repair systems from CertainTeed, Owens Corning, IKO, Atlas, and the rest of our seven-brand lineup. The reason we don’t lock into one manufacturer is simple: a Costa Mesa home with a flat section over the addition and a pitched section over the original build often needs two different systems. Shingles for the pitched side, modified bitumen for the low-slope side. We stock common materials and fasteners for quick turnaround on Costa Mesa repairs, and when the job calls for something specific, our supplier network gets it to the site fast enough that you’re not looking at a tarp for three weeks.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Repair Problems We See in Costa Mesa Homes
- Marine-layer corrosion at fasteners and flashing. The morning fog settles on everything, and the salt works into nail heads and flashing seams. Shingles look fine for years while the fasteners underneath quietly rust through.
- Soft or delaminating 1960s sheathing on Westside post-and-beam homes. The stucco fascia hides what’s happening underneath. When we lift material on 92627 homes, the sheathing is often water-damaged or crumbling, and nailing new material over it won’t hold.
- Low-slope sections gone wrong. Roofs in 92626 tracts frequently have shallow pitches that require modified bitumen or a warrantied low-slope system. Some crews slap architectural shingles on them anyway, and those roofs trap moisture and void wind ratings within a season.
- Failed patches and layered repairs. Multiple patch jobs from previous owners compound each other. One repair seals the leak but traps water behind another layer, and now the fix costs double what the first repair would have.
Pricing for Roof Repair in Costa Mesa, CA
Small, focused repairs on Costa Mesa homes – a vent boot, a section of flashing, a handful of broken shingles – typically run $350 – $950. Leak repairs that involve opening up the roof and replacing decking or underlayment land at $1,200 – $2,800. Low-slope membrane patching and section replacement on homes and commercial buildings runs $800 – $2,500 for a targeted repair. Larger jobs that uncover structural issues go up from there, and that’s where our written allowance system protects you: we put a number on the contract for the known scope, and any hidden damage gets a written price and your approval before we touch it. Get an exact number with a free estimate – call (855) 382-0485.
We Also Serve Cities Near Costa Mesa
Our Costa Mesa crews regularly cross into Newport Beach, Fountain Valley, Huntington Beach, and San Joaquin Hills. If you’re near the 55 or the 405, our Roof Repair team can reach you quickly. See our full coverage at Roof Repair in Costa Mesa.
Serving Costa Mesa, CA — Our Local Coverage Area
We’re based in the Costa Mesa 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 Costa Mesa
The flashing is rusted through or the sealant has failed, and the shingles have nothing to do with it. Costa Mesa’s marine fog delivers salt moisture to the flashings, vent boots, and fasteners every morning, and those components corrode years before the shingles show wear. The fix is replacing the flashing and fasteners with corrosion-resistant materials – patching shingles over a rusted flashing leaks again within a season. Call (855) 382-0485 for a free estimate, and we’ll trace the actual source instead of guessing.
Yes, in most cases. We patch and seam-repair modified bitumen and TPO systems regularly, and a targeted membrane repair runs $800 – $2,500 depending on the number of penetrations and the condition of the existing membrane. If the decking beneath the membrane is saturated or rotted, that changes the scope and we’ll show you exactly what we found before any additional work is priced. Call (855) 382-0485 and we’ll inspect the roof and give you a straight answer on repair versus replacement.
Most often, we find soft or delaminated 1960s sheathing and rusted nail heads that were hidden under the stucco fascia. The fasteners have corroded from decades of marine fog contact, and the decking they were holding has absorbed enough moisture to fail a screw or nail test. We replace the bad decking, install appropriate underlayment, and reset fasteners in stainless so the new roof holds.
We write the known scope into the contract at a fixed price, and we build an allowance for likely hidden work based on what we see during inspection. If we open the roof and find something beyond the allowance – rotted framing, failed decking, previous bad patches – we stop work, show you photographs, and give you a written price to approve before we continue. You never pay for something you didn’t authorize, and you never get a surprise invoice at the end. Call (855) 382-0485 to schedule your free estimate.
Yes. We repair commercial flat and low-slope roofs throughout Costa Mesa, including the retail and industrial buildings off Harbor Boulevard, Baker Street, and the 92626 corridor. Commercial repair pricing runs $800 – $2,500 for typical membrane patches, penetration reseals, and seam repairs, with larger section replacements quoted per project. We work with the membrane you have, not just the ones we’d rather sell.
Written by Noel Carrasco, Owner at Select Roof Repair, serving Costa Mesa and surrounding communities.