Fast, Reliable Roof Replacement & Installation Across Glendora
A full roof replacement on a typical Glendora home runs $12,500-$28,000 depending on size, pitch, and materials, with most asphalt shingle jobs completed in two to three days. Our Roof Replacement & Installation crews are on Glendora roofs year-round, from the post-war ranch tracts near Baseline Road to the custom hillside homes above Lone Hill Avenue in 91741. We’ve served this foothill community since 1984, and we know the difference between a flatland permit and a fire-zone inspection. If your roof is leaking, losing granules, or simply past its service life, call (844) 563-1816. A live person answers, 24/7.
Why Ridgeline Roofing Co. Is Glendora’s Preferred Roof Replacement & Installation Company
We’ve been driving our trucks up Grand Avenue and Foothill Boulevard for over 42 years. That matters in a town where your contractor’s reputation travels faster than any ad. Pete Navarro built Ridgeline Roofing Co. on the idea that a handshake still means something, and our 90-Day Done Right Promise puts that in writing: if it’s not right, we come back and make it right. No paperwork, no arguing.
Our technicians are background-checked, uniformed, and trained to document every inspection with photos from your actual roof. Not a sales pitch in the driveway. Real images, real conditions, real numbers. The estimate we give is the number on the invoice. A square deal.
When a storm rolls through the San Gabriel Valley, our phones stay staffed by a live person around the clock. We’ve answered calls at 2 a.m. from foothill homeowners watching water stain their ceiling during an atmospheric-river event. We’ll be there when we say.
Our Roof Replacement & Installation Services in Glendora
Full Roof Replacement
Most Glendora homes in the 91740 flatlands were built between 1950 and 1975 and are now on their second or third roof. We regularly strip failed 3-tab systems off ranch homes near the corner of Baseline Road and Amelia Avenue, replacing them with modern assemblies that stand up to the thermal punishment this foothill climate delivers. Our crew handles tear-off, decking inspection, and complete re-roofing with the same team start to finish.
New Construction Roofing
Building new in Glendora’s remaining infill lots or adding an ADU? We coordinate directly with your general contractor and the city’s building department to ensure material specs match permit requirements from day one. In 91741’s fire hazard zones, this coordination isn’t optional. It’s the difference between passing inspection and a costly re-do.
Asphalt Shingle Installation
Asphalt shingles remain the practical choice for Glendora’s post-war housing stock. We install architectural shingles from GAF and Atlas with full synthetic underlayment, upgrading homes from the thin 3-tab products that were standard fifty years ago. The Santa Ana winds that funnel through the canyon above town will find every weak seam. We nail to manufacturer spec, every tab, every time.
Tile Roofing
Spanish clay and concrete tile dominate the 91741 foothill zone, and installing it properly requires crews who understand mortar-set ridge and hip work, not just nail-down mechanics. We see too many tile failures where the original installer skipped the detail work. Thermal expansion during winter rain events cracks sloppy mortar. Our guys mix and set to the old standard.
Metal Roofing
For homeowners in Glendora’s highest wind zones or those seeking maximum fire resistance, standing-seam metal roofing offers Class A protection with minimal maintenance. We fabricate panels on-site when possible, reducing leak points from factory seams.
Flat Roofing
Low-slope additions and patio covers in older Glendora homes need membrane systems designed for ponding and UV exposure. We install TPO and modified bitumen assemblies with proper drainage detail.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Glendora
We are authorized installers for GAF, Atlas, and Tamko, with full access to warranty programs that require certified installation. We don’t substitute materials mid-job. The shingle sample you approve is what arrives on the truck. For Glendora customers, this means no delays waiting for special orders. Our supplier relationships let us pull common colors and styles within 24 hours, and we stock synthetic underlayment and ice-and-water shield compatible with local fire-zone requirements. When LA County inspectors ask for documentation, we have it ready.
Common Roof Replacement & Installation Problems We See in Glendora Homes
- Granule loss on north-facing slopes. Glendora’s position against the San Gabriel Mountains creates a natural wind funnel. The Santa Anas strip granules from aging 3-tab shingles, leaving bare asphalt exposed to UV. We inspect for this specifically on homes above Route 66 and in the foothill zone.
- Mortar-set ridge failure on tile roofs. The thermal swing between 105-degree August afternoons and 45-degree January nights cracks ridge mortar on mid-century tile roofs in 91741. Water enters during atmospheric-river events. We remove and re-bed ridges with polymer-modified mortar.
- Attic ventilation deficits in post-war ranches. Homes built in the 1950s and 1960s near Gladstone Street often lack intake ventilation. Summer heat builds to 160 degrees, cooking shingles from below. We add ridge vents and soffit intakes as part of replacement.
- Delaminated plywood decking from moisture intrusion. Decades of Santa Ana-driven wind-blown rain finds gaps in flashing and failed underlayment. We replace damaged decking with CDX plywood, never OSB, because this climate punishes inferior materials.
Pricing for Roof Replacement & Installation in Glendora, CA
Honest numbers for Glendora’s market:
| Service | Typical Range |
|---|---|
| Asphalt shingle replacement (1,500 sq ft ranch) | $12,500 - $18,500 |
| Asphalt shingle replacement (2,500 sq ft two-story) | $18,500 - $28,000 |
| Concrete tile roof (new or replacement) | $22,000 - $38,000 |
| Metal standing-seam roof | $28,000 - $45,000 |
| Flat membrane roof (per sq ft) | $8.50 - $14.00 |
| Decking replacement (per sheet, if needed) | $85 - $140 |
What moves the number: roof pitch (steeper costs more), accessibility, layers to tear off, decking condition, and whether you’re in a fire zone requiring upgraded underlayment. We provide upfront pricing after inspection. The number on the estimate is the number on the invoice. Call (844) 563-1816 for a free, no-pressure assessment.
We Also Serve Cities Near Glendora
Our crews work throughout the eastern San Gabriel Valley. We regularly replace roofs in Glendora, Azusa, Covina, Pomona, and West Covina. Each city has its own permit office, its own inspector preferences, its own microclimate. We know them all. A roof that works in flatland Covina needs different detailing in foothill Glendora. We adjust accordingly.
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 - Roof Replacement & Installation in Glendora
Yes. The 91741 zone above Lone Hill Avenue sits in a CAL FIRE Very High Fire Hazard Severity Zone, and Class A fire-rated roofing assemblies are mandatory for re-roofing. We specify GAF or Atlas architectural shingles with Class A underlayment packages, and we list the underlayment spec explicitly on material submittals because LA County inspectors will reject permits that omit it. This is a hard stop in Glendora that gets waved through in lower-hazard neighboring cities. Call (844) 563-1816 and we’ll walk through your parcel’s requirements.
Replacement is the better choice when granule loss exposes the asphalt mat, shingles are curling or cracking across the field, or the roof is past 20 years of age. We see this constantly on 1950s-1970s Glendora ranches where original 3-tab products have endured four decades of Santa Ana winds and summer UV. Spot repairs work for isolated wind damage or a few lifted tabs. If more than 15% of the field shows wear, replacement saves money long-term. We replaced a failing 30-year-old 3-tab asphalt roof on a 1950s ranch home near the corner of Baseline Road and Amelia Avenue in 91740. The old shingles had granule loss so severe that north-facing slopes were bare, and the plywood decking was delaminating from decades of Santa Ana-driven moisture intrusion. We installed GAF Timberline HDZ architectural shingles with a full synthetic underlayment, bringing the home back to code and adding a 50-year warranty. Call for an honest assessment of your roof’s condition.
Usually not without structural reinforcement. Concrete tile weighs 900-1,200 pounds per square, and most post-war ranch truss systems were engineered for 240-280 pounds. We can evaluate your rafter size, span, and existing load. When reinforcement isn’t practical, heavyweight architectural shingles from GAF or Atlas simulate tile profile at one-quarter the weight. For homes that can take the load, Boral and Eagle concrete tile offer genuine fire-zone compliance with 50-year performance. We’ll inspect and give you real numbers.
Glendora contracts with LA County for building inspection, so permits route through the county’s regional office. We handle the application, the material submittals, and the inspection scheduling as part of every job. In 91741 fire zones, expect two inspections: one mid-project for underlayment verification, one final for completed assembly. Flatland 91740 parcels typically need one final inspection. We never leave a homeowner to navigate this alone. The paperwork is our job.
The Santa Anas blow harder here than in cities further west because Glendora sits at the mouth of San Gabriel Canyon. We schedule installations around wind forecasts, and we never lay underlayment or shingles when gusts exceed 25 mph. Nailing patterns get upgraded in exposed foothill zones. Six nails per shingle instead of four. Enhanced sealant strip activation. These aren’t upsells. They’re how a roof survives its first Santa Ana season. Call (844) 563-1816 to schedule work during favorable weather windows.
Written by Pete Navarro, Owner at Ridgeline Roofing Co., serving Glendora since 1984.