CertainTeed Roofing Service Nationwide

Why Los Angeles Homeowners Choose CertainTeed Roofing

We’re an independent roofing contractor in Los Angeles that services and installs CertainTeed roofs every week, from mid-century Landmark shingles to modern Presidential Shake profiles. As an independent Certainteed service in Los Angeles, we’re not authorized by or affiliated with CertainTeed, but our crews work on hundreds of their roofs across the LA basin each year, giving us field-tested familiarity with how these materials actually behave under Southern California sun, Santa Ana winds, and coastal salt air. If you need CertainTeed roofing repair or service in Los Angeles, call (213) 521-8272 for a free estimate and a written price before any work starts. A roof should be the last thing on your mind, let’s keep it that way.

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Why Trust Mercer Roofing Co Los Angeles for Your CertainTeed Roofing?

CertainTeed roofs are common in Los Angeles because they hold up reasonably well here, but “reasonably well” depends heavily on who installs and services them. Our owner, Grant Whitlock, grew up in Eagle Rock and trained in the building trades program at Los Angeles Trade-Technical College before spending two decades roofing across the LA basin. He’s worked flat torch-down decks in the Valley, clay tile on hillside bungalows in Silver Lake, and composition shingles on everything in between. That range matters when you’re dealing with CertainTeed, because the brand makes everything from entry-level three-tabs to heavyweight designer shingles, and each line fails differently in this climate. Our technicians are background-checked, identity-verified, and arrive at your door in a clean, marked uniform with a photo ID badge, and we send their name and photo ahead of the visit so you know exactly who’s coming. We hold ourselves to the Threshold Verified standard, which every Mercer Roofing location is contractually held to under the Threshold Group framework. The Threshold Standard is what guarantees you get a vetted technician, not a stranger at the door.

Common CertainTeed Roofing Problems We Fix in Los Angeles

• Granule loss and blistering on Landmark shingles. CertainTeed Landmark is the most popular architectural shingle on LA roofs, and its biggest weakness here is the south-facing slope. Prolonged, intense UV exposure breaks down the asphalt matrix and causes granules to shed faster than the manufacturer’s average lifespan would suggest. Homeowners in neighborhoods like Los Feliz and Sherman Oaks often see bare patches and pitting within 15 to 18 years, which is earlier than a shaded north slope would show. We repair this with matching Landmark shingles and address ventilation issues that accelerate heat damage.
• Wind-lifted tabs on Presidential Shake. CertainTeed Presidential Shake is a thick, dimensional shingle that looks beautiful but has a specific failure mode: the tabs lift at the corners when the original installer used short nails. In Los Angeles, Santa Ana winds can hit 40 to 60 mph in the foothills and through passes, and lifted tabs act like small sails. We see this on homes in Pasadena, Glendale, and the Hollywood Hills, where the wind funnels through canyon terrain. The fix is re-nailing with longer fasteners and resealing the affected tabs.
• Sagging roof decks under Grand Manor shingles. CertainTeed Grand Manor is one of the heaviest shingle lines on the market. On older Los Angeles homes built in the 1920s through 1950s, the original roof decking was often 1×6 boards spaced apart, not solid plywood or OSB. Grand Manor’s weight can cause visible sagging between rafters over time. We check decking condition before recommending any Grand Manor repair or replacement, and we’ll tell you straight if the deck needs reinforcement before new shingles go on.
• Cracking along the sealant strip on XT 25 three-tabs. CertainTeed XT 25 was an entry-level three-tab shingle installed on thousands of Los Angeles homes through the 1990s and early 2000s. After years of thermal expansion and contraction, from cool coastal mornings to 100-degree afternoons in the Valley, the shingles crack along the sealant strip. Once that sealant strip fails, wind-driven rain gets underneath. We still repair these roofs, but we’ll be honest with you when patch repairs are no longer cost-effective and a re-roof with a modern architectural shingle makes more sense.
• Leaks around pipe boots and plumbing vent flashing. This is less about CertainTeed and more about the roof penetrations on any shingle roof, but it’s one of the most common calls we get. On a 1990s-era Los Angeles home with CertainTeed Landmark shingles, our tech traced a persistent ceiling stain to a cracked pipe boot and failing sealant around a plumbing vent. After replacing the boot with a compatible metal unit and resealing the flashing, we also replaced several wind-lifted shingles near the ridge, restoring a watertight surface without a full re-roof. That’s the kind of fix we make weekly across Los Angeles.

CertainTeed Parts & Our Repair-vs-Replace Approach

When we repair a CertainTeed roof in Los Angeles, we prefer genuine CertainTeed components for warranty-backed repairs, because those parts are engineered to match the original installation in color, thickness, and performance. For older or discontinued lines, we use high-quality aftermarket alternatives that match color and performance, and we’ll show you the comparison before we commit to anything. We always check decking and underlayment before recommending a full replacement, because a worn-out underlayment under clay tile or a rotted deck edge under shingles changes the entire scope of the job. Our our Roof Repair services focus on repair-vs-replace decisions driven by what’s actually wrong, not by what’s easiest to sell. If a repair will hold for years, we’ll tell you that. If your roof is past the point where patches make sense, we’ll tell you that too, and we’ll put it in writing. Call (213) 521-8272 and we’ll give you an honest assessment with a written price before any work starts.

Our CertainTeed Service Process – Step by Step

1. 1
   Diagnosis. We inspect the roof, identify the specific CertainTeed product line installed, and pinpoint the failure. On a Landmark roof, that means checking granule loss, blistering, and sealant condition. On Presidential Shake, we look at tab lifts and fastener depth.
2. 2
   Written price. Before any work starts, you get a written price. No work begins without it. You’ll know exactly what we’re doing, what parts we’re using, and what it costs. This is standard on every Mercer Roofing job.
3. 3
   Repair or install. We use genuine CertainTeed parts where available, or matched aftermarket alternatives for discontinued lines. Our technicians work from roof access that keeps your property clean, and they badge in with photo ID at the door.
4. 4
   Test and verify. We water-test repairs where possible, check for loose fasteners or lifted tabs, and confirm the surface is watertight before we leave. For tile underlayment replacement, we verify the tile is re-set correctly and the new underlayment is fully lapped.
5. 5
   Written guarantee. Every repair includes a written guarantee. If the repair fails within 365 days, we come back and make it right, free of charge. That’s the Mercer 365-Day Done Right Promise, and it applies to every CertainTeed repair we do in Los Angeles.

CertainTeed Products We Service & Install in Los Angeles

We service and install the CertainTeed lines most common on Certainteed in Burbank and Los Angeles roofs: Landmark architectural shingles, Presidential Shake, Grand Manor, and the older XT 25 three-tabs. We stock a rotating inventory of common CertainTeed shingle colors and profiles locally, which means faster turnaround on repairs for Los Angeles homeowners. If your line is discontinued, we source matched aftermarket alternatives and color-match to your existing roof. For clay tile roofs with CertainTeed underlayment, we also handle underlayment replacement without disturbing tiles unnecessarily. When you call, tell us the year your roof was installed and the shingle style if you know it. That helps us bring the right materials on the first visit.

We Also Service These Brands

CertainTeed is not the only brand on Los Angeles roofs, and we’re not a single-brand shop. We also service and install GAF and Owens Corning roofing systems, plus other manufacturer-recognized shingle brands. If your home has a mixed roof or you’re weighing brand options, we’ll walk you through the real differences without pushing you toward one manufacturer.

FAQs – CertainTeed Roofing Service in Los Angeles

Book Your CertainTeed Service in Los Angeles, CA

If your CertainTeed roof is leaking, losing granules, lifting in the wind, or just due for an inspection, call Mercer Roofing Co Los Angeles at (213) 521-8272. We’ll schedule a visit, send you the technician’s name and photo before we arrive, and give you a written price before any work starts. Every CertainTeed repair includes our written 365-Day guarantee. You’ll know exactly what’s wrong, what it costs, and who’s on your roof.

Written by Grant Whitlock, Owner at Mercer Roofing Co Los Angeles, serving Los Angeles since 2000.