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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
CertainTeed Roofing in Covina, CA | Oakmont Roof Repair
We provide independent Roof Repair in Covina and CertainTeed replacement across the city, and the one thing that shapes our CertainTeed work here more than anything is the city’s aging postwar housing stock. Most Covina roofs we touch are 60 to 70 years old, often carrying two or three shingle layers over original 1950s skip sheathing. That means the most important CertainTeed conversation in this city is usually not “which shingle” but “what’s actually under the shingle.” Call (866) 942-0875 for a free estimate and we’ll give you the straight answer.
Why Covina Residents Choose Us for CertainTeed Service
CertainTeed shingles are all over Covina. Walk through any tract built between Eisenhower and Nixon and you’ll see CertainTeed Landmark on re-roofs, Xtra 3-tab on the older ones, and Flintlastic on low-slope garage and patio sections. We’ve pulled these products apart enough times across the San Gabriel Valley, including West Covina CertainTeed service areas, to know exactly how they age under inland heat, what fails first, and when the failure is the shingle versus the deck underneath. Noel Fierro, who runs Oakmont Roof Repair, learned construction trades at Victor Valley College and spent years on rooftops across San Bernardino County before bringing that experience to Covina. His father was a general contractor who always said the roof is the one thing you can never ignore. We took that seriously.
We carry seven major roofing brands, including always some CertainTeed, so when we recommend a CertainTeed product it’s because it fits your Covina roof, not because it’s the only line we stock. The roof doesn’t lie and neither does he.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in Covina
- Granule loss and thermal cracking on older CertainTeed Xtra 3-tab fields. Covina summers regularly push past 95°F and the UV saturation is relentless. The asphalt mat in those older three-tab shingles bakes until it’s brittle before the shingles even show visible curl, and the granules end up in your gutters. By the time you see bare patches, the waterproofing is already compromised.
- Wind uplift and tab peeling after Santa Ana events. When those dry northeast winds whip through the San Gabriel Valley, the first things to go on older CertainTeed installs are the ridge caps, rakes, and starter courses, especially where the original install used too few fasteners or the sealant strip has long since baked out.
- Flashing and vent-boot leaks at penetrations and wall tie-ins. On Covina’s low-pitch roofs, water moves slower and finds every imperfect seam. The homeowner usually sees a ceiling stain first, then calls us. Often the shingle field is fine and the actual failure is a rusted vent boot or a compromised wall flashing.
- Overlay-on-overlay fatigue. CertainTeed shingles nailed over one or two prior layers on original skip sheathing eventually reach a point where the top surface looks serviceable but the assembly underneath has lost its hold. Fasteners pull, the deck flexes, and water gets in through the old layer joints.
- Patio cover and attached-garage roof failures. These low-slope sections on Covina’s 1950s tract homes are often either the original torch-down or a bad patch job. They need a proper Flintlastic modified bitumen detail, not another smeared layer of repair mastic.
CertainTeed Service in Covina: What Local Conditions Mean for Your Roof
Here’s what we see on Covina’s older tracts that we don’t see in the newer foothill towns south and east of the city: the original roof is often the second or third layer laid over 1950s skip sheathing, and what a homeowner budgets as an overlay re-roof almost always converts into a full tear-off and re-sheet once the deck is exposed. On a 1956 ranch house off Citrus CertainTeed service territory in the 91723 flats, a homeowner called about a stain over the attached-garage ceiling and a few tabs missing after a Santa Ana blow. When we pulled the CertainTeed Landmark field back, we found it laid over an earlier Xtra 3-tab layer on original skip sheathing. We tore off both layers, re-sheeted the deck solid, replaced the rusted vent boots and step flashing at the garage tie-in, and re-roofed in Landmark Pro with new underlayment. The leak stopped. The low-pitch patio-cover section got proper Flintlastic detail instead of another patch.
CertainTeed Models & Products We Service in Covina
We work on CertainTeed Xtra 3-tab shingles, still common on 1960s through 1990s Covina re-roofs; CertainTeed Landmark architectural shingles, the workhorse for mid-century and later homes; Landmark Pro for homeowners who want a heavier profile and stronger wind resistance; and CertainTeed Flintlastic modified bitumen for the low-slope patio covers and attached-garage roofs that are everywhere in this city. When we repair, we match the existing shingle profile and color where possible and use quality underlayment and flashing rather than cheap substitutes, because the deck and flashing outlive the shingle. For more on our CertainTeed work across the region, see our CertainTeed sales & service page.
See the difference
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AfterCertainTeed Service Pricing in Covina
CertainTeed roof work in Covina depends on three things: how many layers are coming off, whether the skip sheathing needs to be replaced with solid decking, and how much flashing and ventilation work the structure requires. A localized repair, like replacing a few lifted tabs or a rusted vent boot, costs far less than a full tear-off and re-sheet, which is a structural job wrapped in a roofing job. When we quote, we give you a written line-item estimate so you can see exactly what’s driving the number. We’ll also be honest when a smaller repair will buy you real years versus when the roof needs to come off. Call (866) 942-0875 for an exact quote, estimates are free and there’s no pressure either way.
Serving Covina, CA — Our Local Coverage Area
We’re based in the Covina 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 – CertainTeed Roofing in Covina
It depends on what’s underneath. On Covina’s postwar tracts, we often find two or three layers over 1950s skip sheathing, and most city codes won’t allow another overlay on top of that. The honest answer is usually a tear-off. We’ll inspect and tell you exactly what you’re working with before you spend anything. Call (866) 942-0875 to schedule an inspection.
Inland San Gabriel Valley heat, routinely over 95°F in summer, accelerates granule loss on asphalt shingles, especially older Xtra 3-tab lines. The UV bakes the asphalt mat until it’s brittle, and granules shed faster than they would in coastal climates. Some granule loss is normal aging; heavy loss with bare patches means the shingle’s protective layer is gone. Call (866) 942-0875 and we’ll tell you whether it’s time to act.
Lifted ridge caps and tabs are usually a repair, not a re-roof, as long as the rest of the field is sound and the deck underneath is intact. We’ll re-secure or replace the lifted pieces and check the surrounding area for hidden wind damage. If the shingles were installed with too few fasteners originally, we’ll address that as we go.
Yes and those sections are often the first to leak on Covina’s older homes. Low-slope surfaces need a proper modified bitumen system like CertainTeed Flintlastic, not standard shingles and not mastic patches. We replace rotted decking, install the correct membrane, and tie it properly into the house wall and the main roof.
No, we’re an independent roofing company. We install and repair CertainTeed products to manufacturer spec because they’re good materials and they fit many Covina homes, but we’re not authorized, sponsored, or warranty-endorsed by CertainTeed. We carry seven major brands, so our recommendation is based on your roof and your budget, not on a single manufacturer’s line.
Service Areas Near Covina
We serve Covina and the surrounding San Gabriel Valley communities, including Covina service area neighborhoods from the 91722, 91723, and 91724 ZIP codes. For CertainTeed work just east of Covina, visit our CertainTeed service in Irwindale page. We also cover CertainTeed service in Bradbury and neighboring foothill communities like Glendora and West Covina.
Book Your CertainTeed Service in Covina Today
If your CertainTeed roof is losing granules, lifting at the ridges, or leaking at a garage tie-in, don’t wait for the next rain. Call (866) 942-0875 to schedule your free estimate. We’ll inspect, explain what’s actually happening, and give you a written quote with no pressure. Roof repair when it makes sense, replacement when it’s time.
Written by Noel Fierro, Owner at Oakmont Roof Repair, serving Covina, CertainTeed in Azusa, and the broader San Gabriel Valley with independent roofing service.