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 Replacement Across Covina
Roof replacement in Covina costs between $9,800 and $24,000 for a typical single-story postwar tract home, with most full tear-off and re-roof projects landing between $14,000 and $19,000 depending on square footage, pitch, and what’s hiding under the old layers. We’re Oakmont Roof Repair, and we’ve opened enough roofs in Covina to know the real story isn’t the shingle you can see. It’s the 60-year-old decking, the second or third shingle layer, and the ventilation that was never right to begin with. Call (866) 942-0875 for a free estimate, and we’ll give you an honest condition report before you spend a dollar.
Why Oakmont Roof Repair Is Covina’s Preferred Roof Replacement Company
Noel Fierro built Oakmont Roof Repair around a simple idea: a roofing company should inspect, repair, and replace roofs without pushing a single-brand agenda. That matters in Covina, where the housing stock is dominated by 1950s-60s tract homes that all age the same way at the same time. We know the streets, from the postwar blocks around Covina Park to the newer sections near Charter Oak, and we understand what the inland-valley sun does to asphalt shingles on a low-pitch roof with attached patio covers.
Our technicians are roofing specialists, not general contractors who also hang drywall. When we walk a roof in Covina, we’re looking at decking condition, layered shingle history, flashing at the valleys, and soffit intake. That’s the whole job. Our customers in 91722, 91723, and 91724 call us because we carry seven major roofing brand lines, so the recommendation matches the roof and the budget, not the inventory we happen to stock.
We schedule free estimates throughout Covina every week, and our team knows the neighborhood-level differences that affect pricing: the older tracts off Citrus Avenue with original skip sheathing, the steeper ranch-style roofs near Covina High, and the flat-roof additions common on 1970s homes. That local familiarity means fewer surprises for you when the work starts.
Styles & brands we work with
Flat Roof Replacement in Covina
Flat roof replacement in Covina runs $11,000 to $22,000 depending on the roofing system, square footage, and whether the existing decking is salvageable. We see a lot of flat and low-slope sections on Covina homes, usually over additions, attached garages, or patio covers that were built decades ago and have been patched repeatedly. The heat and UV here degrade rolled roofing and aging membrane faster than homeowners expect, and the first sign is usually a drip near the tie-in where the flat section meets the main roofline.
What Gets Replaced
On most Covina flat-roof jobs, we’re removing old membrane or rolled roofing, inspecting the decking beneath, and rebuilding the surface with proper taper where ponding water has been an issue. The hidden problem is usually at the flashings: the wall ties, the scupper edges, the vent penetrations. Those fail quietly and leak into the ceiling long before the field membrane looks bad.
Ventilation and Drainage
Flat and low-pitch sections trap heat against the underside of the roofing, which cooks the material from both directions in Covina’s summer. If the existing patio cover tie-in blocks the soffit intake, that heat has nowhere to go. We address drainage slope and intake air as part of the replace, because swapping the surface without fixing the airflow just guarantees a shorter lifespan for the new roof.
Roof Installation in Covina
Roof installation in Covina, meaning full tear-off and re-roof on an existing home, typically starts at $9,800 for a small single-story ranch and runs to $24,000 or more for larger two-story homes with steep sections and multiple layers to remove. New construction roof installation, which covers the handful of infill lots and ADU projects in Covina, starts lower for the surface itself but adds decking, underlayment, and inspection costs. Most Covina projects we quote are replacements, not new builds.
Decking and Sheathing
The sheathing on a 1950s Covina home is often 1×6 skip sheathing, spaced boards rather than solid plywood, and it has usually been nailed through three times already. If the existing roof is the second or third layer, local code requires a tear-off. Once the shingles come off, we inspect the decking board by board and replace any rotted or delaminated sections before laying new underlayment. That replacement is priced in writing when the crew finds it, not after the job is done.
Underlayment and Material Choice
We carry GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, so the material is matched to your home’s exposure, pitch, and budget. For Covina’s inland heat and Santa Ana wind gusts, we often recommend architectural shingles with a higher wind rating, installed over a full synthetic underlayment with ice and water shield through the valleys. The material is your choice. The installation standard is ours.
Trusted Brands We Service in Covina
Oakmont Roof Repair carries seven major roofing brands under one roof: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That gives Covina homeowners something rare in replacement roofing: a real comparison, not a single-manufacturer pitch. We stock local parts and materials for common Covina roof profiles, which means we can move quickly on a replacement once you approve the scope. You’re not locked into whatever product line a single-brand contractor prefers. You get the brand that makes sense for your roof, your home style, and your budget.
Common Roof Replacement Problems We See in Covina Homes
- Hidden second and third shingle layers over 1950s skip sheathing. A roof that looks like a simple overlay is often two or three layers deep over original spaced-board decking. The moment the top layer comes off, the job becomes a full tear-off with decking repairs, and that scope change is exactly why we inspect and price the decking allowance before work starts.
- Granule loss and thermal cracking from inland-valley UV. Summer highs over 95°F bake asphalt shingles year after year. We regularly see shingles on Covina roofs with bare fiberglass showing because the protective granules have cooked off, which is the roof telling you it’s past retirement age.
- Santa Ana wind damage at eaves and starter strip. The dry gusts that come through the San Gabriel Valley don’t just lift loose shingles. They find the poorly nailed starter courses at the eaves and gable edges, and once the first shingle lifts, the rest of the field is exposed. A wind-rated installation with correct nailing matters more here than in coastal LA.
- Low-pitch sections with blocked soffit intake and flashing leaks at patio-cover tie-ins. Covina’s postwar homes often have attached patio covers or low-slope additions where the original builder undersized the ventilation. Heat and moisture trap at the valleys and wall flashings, and that’s where the roof leaks first, even when the field shingles look fine.
See the difference
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After
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Before
AfterPricing for Roof Replacement in Covina, CA
Roof replacement in Covina runs $9,800 to $24,000 for a full project. A straight single-layer tear-off and re-roof with architectural shingles on a 1,200 to 1,600 square foot ranch usually falls between $14,000 and $17,000. If there’s a second or third layer hiding over skip sheathing, decking replacement adds $2,500 to $6,000 depending on how many boards have failed. Low-pitch flat sections with membrane run $11,000 to $22,000 as a separate scope. Attached patio covers, steep pitch premiums, and ventilation upgrades like new ridge vent and soffit intake add to the total but are priced in your written estimate before work begins. Call (866) 942-0875 for a free, itemized estimate, and we’ll walk the roof with you so you know exactly what you’re paying for.
We Also Serve Cities Near Covina
Oakmont Roof Repair covers Covina and the surrounding San Gabriel Valley communities. Our Roof Replacement team regularly works in Irwindale, Azusa, Citrus, and West Covina, where the postwar housing stock and inland heat create the same re-roof challenges we see here. If you’re in a neighboring city and want the same inspection-first approach, call (866) 942-0875.
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 About Roof Replacement in Covina
Because Covina’s 1950s-60s tract homes often hide a second or third shingle layer over original skip sheathing, and code requires a full tear-off when multiple layers are present. When the top layer comes off, rotted decking, failed fascia at patio-cover tie-ins, or soft sheathing around vents becomes visible. We handle this by inspecting the roof before quoting, writing a decking replacement allowance into the contract, and getting your written approval on any additional scope before we open the next layer. Call (866) 942-0875 and we’ll do that inspection for free.
Compare the decking allowance first. Two companies can quote the same shingle and underlayment, but if one bid doesn’t include an allowance for replacing rotted skip sheathing on your 1950s Covina home, that bid is artificially low and will climb once the tear-off starts. Look for written line items covering: number of layers to remove, decking replacement cost per sheet or board, ventilation upgrades, and flashing at the patio cover or low-pitch tie-ins. Then look at the material brand. We give you a written, itemized estimate so you can compare us fairly.
Yes, and in Covina it should be done in one project. The patio-cover tie-in is exactly where we find the rotted fascia and blocked soffit intake that causes leaks at the valley. On a recent project near Covina Park, our crew pulled three layers off a low-pitch section and found the original skip sheathing soft and the fascia rotted at the patio-cover connection. We replaced the decking, laid new underlayment with ice and water shield through the valleys, and installed Owens Corning architectural shingles with a proper ridge vent and soffit intake so the whole section finally breathes. The homeowner got the decking and fascia repairs priced and approved in writing before we ever opened the second layer. Call (866) 942-0875 to schedule that same walk-through on your roof.
Not special shingles, but a wind-rated installation. Covina sits in the inland San Gabriel Valley where Santa Ana gusts blow through the passes and hit low-pitch eaves and gable edges harder than people expect. The failure point is usually the starter strip and the nailing pattern, not the shingle itself. We install architectural shingles with a high wind rating from brands like Atlas, Tamko, or Boral, using a six-nail pattern on steep or wind-exposed sections. The material is standard. The fastening and starter detail is what holds.
Most Covina homes built in the 1950s-60s were built with undersized or blocked soffit intake, which traps heat and moisture in the attic and shortens shingle life from the underside. During a replacement, we look at whether the existing ridge vent, box vents, or soffit vents are actually moving air. If the patio cover or a low eave blocks the intake, we add or clear intake vents so the attic can exhaust properly. On the Covina Park project, the ridge vent was just decorative, and the soffit intake was painted over. We corrected both. Ventilation is part of the replace, not an optional add-on.
Get Your Free Covina Roof Replacement Estimate
If your Covina roof is showing its age, or if a neighbor’s house on your block just got re-roofed and you’re wondering about yours, call (866) 942-0875. We’ll come out, walk the roof, and tell you exactly what’s up there: how many layers, what the decking looks like, whether the ventilation is working, and what it actually needs. You’ll get a written, itemized estimate with real numbers and a clear scope. Repair when it makes sense. Replace when it’s time. You’ll know which one it is.
Written by Noel Fierro, Owner at Oakmont Roof Repair, serving Covina and the San Gabriel Valley.