Architectural shingles
Metal roofing
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 Replacement Across Glendora
A full roof replacement in Glendora typically runs $11,000 to $24,000 for a standard single-story home, and most tear-offs we schedule in the 91740 and 91741 zip codes are completed within five to seven working days once materials land. We know these neighborhoods because we work them constantly. The valley-floor tract homes off Route 66 in 91740 are a different animal from the hillside custom homes climbing into the San Gabriels above Sierra Madre Avenue in 91741, and a replacement bid has to respect that difference from the first measurement.
Oakmont Roof Repair has been handling residential roof replacements across Glendora long enough to know which homes hide what. If you’re staring at a failing roof and want a straight answer on cost and timing, call (866) 942-0875 and we’ll schedule a free estimate at your property.
Why Oakmont Roof Repair Is Glendora’s Preferred Roof Replacement Company
Glendora homeowners call us because we carry seven major roofing brands: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That’s not a sales line. It means when we walk your roof and tell you a CertainTeed architectural shingle is the right call for your south-facing 91741 slope while a value-tier Owens Corning line makes more sense for a shaded 91740 ranch, we’re recommending from seven options, not two. The recommendation follows the roof, not our inventory.
Our team is roofing-only. We’re not a general contractor who takes a roof job between kitchen remodels. Every person who shows up at your Glendora property spends their week on roofs: tear-offs, decking, underlayment, flashing, ridge caps, and the warranty paperwork that goes with each manufacturer. That focus is why Glendora customers keep our number, and why we get called back when a neighbor’s roof goes.
Led by Noel Fierro, Oakmont Roof Repair treats roof inspection as a standalone service. You can hire us to assess your Glendora roof and tell you honestly whether you need a repair or a full replacement. No obligation to do the work with us, and no pressure to sign before you’ve had a day to think. That inspection-first approach is the strongest trust builder we have in this city.
Styles & brands we work with
New Roof Installation in Glendora
New Roof Installation in Glendora means tearing everything down to the decking and building the roof system back up from scratch, and on the 91741 hillside homes that often includes heavier tile profiles, steeper pitches, and code-compliant fire-zone underlayment that a valley-floor tear-off may not need. A full new roof installation in Glendora typically runs $12,000 to $25,000 depending on square footage, pitch, and material line. If you’re buying a 1950s fixer in 91740 or building new in the foothills, this is the service you’re pricing.
When a Full Tear-Off Makes Sense
If your current roof is original to the home or already carries two layers of shingles, a clean tear-off is the only honest option. Adding a third layer hides decking rot and flashing failures, and it violates California building code. Glendora homes built in the 1950s through 1970s often have original low-profile composition shingles that are decades past their useful life, and the decking underneath is frequently the real story.
What We Install on a New Roof
Every new installation includes new underlayment, drip edge, flashing at all penetrations, and manufacturer-specified ventilation. On 91741 foothill slopes, we also address uplift rating for Santa Ana wind exposure and fire-zone underlayment requirements where applicable. You’ll get a written line-item scope before any work starts, so you know exactly what’s being torn off, what’s going back on, and what it costs.
Reroofing in Glendora
Reroofing in Glendora means replacing the shingle or tile layer while reusing the existing decking where it’s sound, and for many 91740 valley-floor homes with one re-roof already on the books, that’s a legitimate cost-control move. A reroof in Glendora typically runs $9,000 to $18,000 depending on material and how much decking actually needs replacement once we open the roof up. The honest caveat: on 1950s-70s tract homes, soft decking and failed underlayment are common enough that a reroof often turns into a partial re-deck, which is exactly why we write allowances into the contract up front.
Decking Repair During a Reroof
We won’t nail new shingles onto rotted plywood. When our crew opens a 91740 roof and finds soft decking, that gets replaced at a per-sheet rate already written into your contract, not sprung on you at the end. This is the single biggest reason a Glendora reroof quote moves, and we handle it with an inspection-first, allowance-based contract rather than a surprise change order.
Material Options for Reroofing
Because we stock seven manufacturer lines, your reroof can go budget-conscious or premium without switching companies. Owens Corning and IKO give solid performance at a lower price point for shaded valley-floor homes, while GAF and CertainTeed architectural lines hold up better on sun-baked foothill slopes in 91741. We’ll show you the actual samples and let the roof’s exposure drive the pick.
Trusted Brands We Service in Glendora
Oakmont Roof Repair installs and services roofs from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and that breadth means Glendora homeowners get a material recommendation matched to their microclimate, not a dealer’s stock sheet. For the intense UV on south- and west-facing 91741 slopes, we lean toward heavier architectural shingles with better granule adhesion from GAF or CertainTeed. For a shaded 91740 ranch that won’t see that sun load, an Owens Corning or IKO line saves real money without losing years. We keep local Glendora supply relationships for fast material delivery, so a scheduled replacement doesn’t stall waiting on a truck from the Inland Empire.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Glendora Homes
- Sun-baked shingle failure on 91741 foothill slopes. South- and west-facing roofs above the valley floor take full afternoon sun off the San Gabriels, and asphalt shingles there fail noticeably faster than identical product on a shaded 91740 street. Granule loss and cracked tabs show up years before water ever enters the equation.
- Santa Ana wind damage at ridge caps and shingle tabs. Wind funnels down the canyon mouths and hits the exposed upper slopes first. We routinely strip ridge caps that have been lifted clean off their nails and shingle tabs that have snapped at the seal line.
- Hidden decking rot in 1950s-70s valley-floor homes. Original low-profile composition roofs with failing underlayment let moisture sit on plywood decking for years before a leak shows on the ceiling. By the time the shingles come off, the decking is often too far gone to reuse.
- Failed flashing at plumbing penetrations and valleys. Older Glendora roofs have galvanized flashing that rusts through at the boot collars and valley liners. It’s one of the most common surprises we find after tear-off, and it’s exactly why our contracts carry a written flashing-repair allowance.
Pricing for Roof Replacement in Glendora, CA
Expect a Glendora roof replacement to run $11,000 to $24,000 for a typical single-story home, with the final number driven by square footage, pitch, tear-off layers, decking condition, and material line. A basic three-tab reroof on a shaded 91740 ranch can land near the low end. An architectural shingle replacement with decking repair on a steep 91741 hillside home lands near the top, and complex tile roofs can push beyond that range. The 91740-versus-91741 split matters more than most contractors admit: sun-baked foothill slopes require better underlayment, better ventilation, and often more decking replacement than a shaded valley-floor roof of the same size. We give free estimates, and we write every quote as a line-item breakdown with allowances for decking and flashing so the number doesn’t move on you mid-job. Call (866) 942-0875 to schedule yours.
What you won’t get is a verbal ballpark that doubles after the shingles come off. Our contracts carry written allowances for decking, flashing, and ridge detail, and any change is priced and approved in writing before we touch it.
Glendora sits directly at the foot of the San Gabriel Mountains, so roofs here take a one-two punch no neighboring flatland city gets: intense foothill sun baking south- and west-facing slopes while Santa Ana wind events funnel down the mountain canyons and pry at ridge caps, fascia, and aged shingles. The 91741 hillside homes above the valley floor add slope, fire-zone, and wind-exposure considerations that the flatter 91740 grid on the valley side simply doesn’t have.
That’s why an inspection-first, allowance-based contract is the only way we quote Roof Replacement work in this city. On a 1962 single-story tract home off the 91740 valley grid, our crew stripped the original low-profile composition shingles and found three sheets of soft decking plus rusted flashing at the plumbing penetrations that no walk-through could have seen. We priced the decking and flashing repair in writing before pulling a single nail, then installed GAF architectural shingles over new ice and water shield in the valleys and a fresh starter strip along the drip edge. The homeowner approved the change order the same afternoon, and the ridge vent went on the next morning.
That’s the difference between a quote that holds and one that climbs. We write the allowances in from the start because we’ve opened enough Glendora roofs to know what’s usually underneath.
We Also Serve Cities Near Glendora
Oakmont Roof Repair regularly handles roof replacement work in Roof Replacement in Glendora and the surrounding San Gabriel Valley cities including Azusa, Citrus, Covina, and Irwindale. If you’re on the edge of Glendora or just over the city line, we likely cover your street. Call (866) 942-0875 and we’ll confirm your address on the spot.
Serving Glendora, CA — Our Local Coverage Area
We’re based in the Glendora 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 Glendora
A quote changes because of what’s under the shingles, not because the roofer underbid. 1950s-70s valley-floor homes in 91740 often hide soft decking, failed underlayment, and rusted flashing that no walk-through can detect. We write allowances for decking and flashing repair directly into the contract, and any change order is priced and approved in writing before work proceeds. Call (866) 942-0875 for a quote that accounts for what Glendora homes actually hide.
Yes. 91741 hillside homes have steeper pitches, heavier tile, fire-zone underlayment requirements, and Santa Ana wind exposure that the shaded 91740 grid doesn’t face. We specify uplift-rated fastening patterns and better underlayment on upper slopes, and we account for more decking repair because those roofs bake in full afternoon sun. The same square footage can legitimately cost more on the hill than on the valley floor.
Santa Ana winds funnel down the canyon mouths and hit exposed 91741 slopes hard, lifting ridge caps and snapping aged shingle tabs. For those homes, we lean toward heavier architectural shingles with stronger seal strips and better uplift ratings from GAF or CertainTeed, and we install a reinforced starter strip and additional fasteners at the ridge. Valley-floor homes in 91740 don’t get the same wind load and can safely use a broader range of product lines.
A square is 100 square feet of roof area. If your bid says 23 squares, that’s 2,300 square feet of roofing surface, not the footprint of your home. Glendora bids should always list squares, material line, tear-off layers, decking allowance, and flashing allowance separately. If a bid only gives you a single bottom-line number, ask for the breakdown. Call (866) 942-0875 and we’ll walk you through ours line by line.
A replacement that involves a full tear-off triggers current California building code for underlayment, ventilation, and fastening patterns, and foothill homes in 91741 may also require fire-zone-rated materials. Adding a second or third layer over an existing roof is generally not code-compliant, which is why we tear off rather than overlay. We pull permits on every replacement where they’re required, and we don’t ask you to handle the paperwork.
Written by Noel Fierro, Owner at Oakmont Roof Repair, serving Glendora and the San Gabriel Valley since our founding.