Fast, Reliable Roof Replacement & Installation Across San Dimas
Roof replacement in San Dimas typically runs $12,000-$28,000 for a standard home, with most full replacements completed in 2-4 days. If your roof is leaking, shedding shingles, or your insurer has flagged non-compliant materials, we’ll get a uniformed technician to your San Dimas home for a photo-documented inspection, often same-day. Call (877) 367-1429 - a live person answers, 24/7.
We’ve been working in the San Gabriel Valley since 1984, and San Dimas presents a roofing puzzle you won’t find in flatter valley cities. The foothill neighborhoods climbing toward the San Gabriel Mountains sit in California’s Very High Fire Hazard Severity Zone, which changes what materials you’re legally allowed to install. Meanwhile, the valley floor holds thousands of 1960s-1980s ranch homes whose original roofs are hitting the end of their lifespan. We know both worlds - from the Via Verde planned community to the tract homes along Arrow Highway - and we pull permits that pass inspection the first time.
Why Ridgeline Roofing Co. of California Is San Dimas’s Preferred Roof Replacement & Installation Company
Forty-two years in business means we’ve seen three full generations of roofing in San Dimas. When we started in 1984, many of the homes we now re-roof were brand new. That longevity matters because we know which 1970s tract developments used what underlayment, which hillside custom homes were built with inadequate ventilation for today’s fire codes, and how the Santa Ana winds that funnel through San Dimas Canyon behave differently than the breezes in Pomona or Glendora.
Our Roof Replacement & Installation in San Dimas crews are background-checked, uniformed, and trained in-house - not day-labor pickups from a parking lot. Every inspection produces photos from your actual roof, emailed to you before we discuss options. No scary speeches in the driveway. No pressure to sign tonight.
The 90-Day Done Right Promise applies to every San Dimas job: if something isn’t right, we come back and make it right. No paperwork to file, no runaround, no arguing about whose fault it was. We’ve operated this way since before most of our competitors existed.
And when you call (877) 367-1429, a live person answers. Nights, weekends, during Santa Ana wind events - no voicemail trees, no callback windows. We’ve had San Dimas homeowners reach us at 11 PM with water coming through the ceiling, and we’ve had a crew tarping the roof before morning.
Our Roof Replacement & Installation Services in San Dimas
Full Roof Replacement
Most San Dimas full replacements we handle fall into two categories: aging asphalt shingle roofs on 1960s-1980s valley-floor ranches that have reached 25-30 years, and urgent fire-zone re-roofs on hillside homes where wood shakes must come off. We replaced a 40-year-old wood shake roof on a custom home in the Via Verde planned community after the previous roof lost several shakes during a Santa Ana wind event funneled through San Dimas Canyon. The homeowner discovered during inspection that their insurer would not renew until a Class A fire-rated asphalt shingle roof was installed, so we removed the old shakes and installed Owens Corning Duration Cool Series shingles with a synthetic underlayment to handle the UV degradation from 100°F summers. Full replacement includes tear-off, deck inspection, proper ventilation upgrades, and permit handling - we know the Los Angeles County requirements and the San Dimas-specific fire zone overlays.
New Construction Roofing
For new builds in San Dimas, we coordinate with your builder or act as the roofing subcontractor directly. Fire zone compliance is non-negotiable north of Foothill Boulevard, and we spec Class A materials from the start so your certificate of occupancy isn’t held up. We’ve roofed custom homes in the hills above San Dimas Avenue and tract developments near Lone Hill Avenue, always pulling permits that clear inspection without rework.
Asphalt Shingle Installation
Asphalt shingles dominate San Dimas re-roofs for good reason. They’re cost-effective, come in Class A fire-rated options, and handle the thermal cycling from 100°F days to 45°F winter nights better than most materials. We install GAF Timberline HDZ, CertainTeed Landmark, and Owens Corning Duration lines - all with full manufacturer warranties and our 90-Day Done Right Promise on workmanship. For San Dimas’s UV exposure, we typically recommend synthetic underlayment rather than felt, and we pay special attention to ridge venting since trapped attic heat accelerates shingle aging.
Tile Roofing
Clay and concrete tile roofs are common on the larger custom homes in San Dimas’s hillside areas, especially in the Via Verde and upper San Dimas Canyon neighborhoods. Tile lasts 50+ years, but the underlayment beneath it does not. We specialize in tile roof restoration - removing and saving existing tiles, replacing degraded underlayment, and reinstalling with proper fastening for Santa Ana wind resistance. Improperly fastened tile is a liability in San Dimas; we’ve seen entire sections lifted and scattered during wind events. Our crews use corrosion-resistant fasteners and proper batten spacing for the local wind load.
Metal Roofing
Metal roofing is increasingly popular for San Dimas hillside homes needing Class A compliance without the weight of tile. Standing seam and stone-coated steel options resist Santa Ana wind uplift, reflect summer heat, and carry 40-70 year lifespans. We install Atlas and Tamko metal product lines with proper fastening patterns for the San Dimas wind zone. Metal costs more upfront than asphalt, but for homeowners planning to stay decades, the math often works.
Flat Roofing
The low-slope sections common on 1960s-1980s San Dimas ranches - over garages, additions, and patio covers - take a beating from UV exposure. We install TPO, modified bitumen, and built-up systems with reflective coatings to reduce thermal stress. These areas often fail first because homeowners don’t inspect them regularly.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Dimas
We don’t substitute materials without your knowledge. As an authorized installer for GAF, CertainTeed, Owens Corning, Atlas, Tamko, and Boral, we order exactly what we spec and deliver manufacturer documentation with every job. For San Dimas’s combination of fire-zone requirements and UV stress, we typically lean on Owens Corning Duration for asphalt shingle re-roofs - the SureNail strip provides extra wind resistance for Santa Ana events, and the Cool Series options reduce thermal load. GAF Timberline HDZ is our go-to when homeowners want the strongest wind warranty in the industry. We keep common colors and accessories in regional supply, so most San Dimas jobs aren’t waiting on special orders.
Common Roof Replacement & Installation Problems We See in San Dimas Homes
- Santa Ana wind damage on hillside homes. Winds accelerate through San Dimas Canyon and local drainages, lifting aged or improperly fastened tiles and shakes. We inspect fastening patterns and replace inadequate nails or clips with wind-rated hardware.
- UV degradation of flat and low-slope roofs. Summer temperatures over 100°F cook the underlayment and sealants on 1960s-1980s ranch-style homes, causing alligatoring and seam separation before the surface material shows wear.
- Fire-zone non-compliance triggering insurance non-renewal. Wood shake roofs north of Foothill Boulevard are code violations on any permitted re-roof. Many homeowners learn this only after damage, when their insurer refuses to renew until compliant materials are installed.
- Failed original wood shakes in Via Verde and similar communities. These 1970s-1980s custom homes were built with cedar shakes that reached end-of-life years ago. Replacement is now urgent, not optional, given insurer and code pressure.
Pricing for Roof Replacement & Installation in San Dimas, CA
Here’s what we see in the current San Dimas market. These are installed, permitted, warranted ranges - the number we quote is the number you pay.
| Service | Typical Range in San Dimas |
|---|---|
| Asphalt shingle full replacement (1,500-2,500 sq ft) | $12,000-$22,000 |
| Tile roof underlayment replacement (save existing tile) | $8,000-$15,000 |
| Metal roofing full replacement | $22,000-$38,000 |
| Flat/low-slope roof replacement (TPO/modified bitumen) | $8,000-$16,000 |
| Wood shake removal + Class A asphalt replacement (fire zone) | $18,000-$28,000 |
What moves the needle: roof pitch (steeper costs more), deck condition (water damage requiring plywood replacement adds $2-$4 per square foot), accessibility (hillside homes with limited truck access), and whether we’re saving existing tile or full tear-off. Fire-zone jobs north of Foothill Boulevard require specific materials and documentation, but the permit itself isn’t dramatically more expensive - the compliance work is built into our standard process.
We provide free, written estimates with line-item breakdowns. No deposit required to schedule. Call (877) 367-1429 for an exact quote on your San Dimas home.
We Also Serve Cities Near San Dimas
Our crews work daily throughout the eastern San Gabriel Valley. If you’re in Charter Oak, La Verne, Pomona, or Glendora, the same 90-Day Done Right Promise, live-phone service, and photo-documented inspections apply. Our Roof Replacement & Installation team coordinates across these communities from our Los Angeles base, with response times typically under 90 minutes to San Dimas and adjacent areas.
Serving San Dimas, CA - Our Local Coverage Area
We’re based in the San Dimas 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 San Dimas
Yes, any re-roof in the VHFHSZ area north of Foothill Boulevard requires a permit through Los Angeles County, and the permit mandates Class A fire-rated materials - wood shakes cannot be replaced in kind. We handle the permit application, fire zone documentation, and inspection scheduling as part of our standard process. Call (877) 367-1429 and we’ll confirm your property’s zone status before we quote.
Many insurers are already non-renewing policies on homes with wood shakes in the Very High Fire Hazard Severity Zone, and some won’t write new policies until a Class A roof is installed. If you’ve received a notice or your renewal has conditions, we can document the existing roof condition and provide a written estimate for compliant replacement that you can submit to your agent. Call (877) 367-1429 - we can often inspect within 24 hours.
Properly installed asphalt shingles with a high wind warranty, or standing seam metal, perform best. The key is fastening - not the material itself. We use six nails per shingle in wind-exposed areas, corrosion-resistant fasteners, and full synthetic underlayment. Tile can work but requires upgraded clips and batten fastening that many original installations lack. We assess your specific exposure during inspection.
Yes, metal roofing meets Class A requirements and is an excellent choice for Via Verde’s custom homes, where homeowners often plan to stay long-term. Standing seam or stone-coated steel weighs less than tile, lasts 40-70 years, and handles Santa Ana winds well. We install Atlas and Tamko metal systems with proper fastening for the local wind zone. Expect $22,000-$38,000 for a typical Via Verde home. Call for a free estimate.
We recommend a professional inspection every two years for asphalt shingle and flat roofs in San Dimas, and annually for wood shakes or tile roofs over 25 years old. Our $89 Seasonal Tune-Up includes photo documentation, fastener check, and sealant assessment. Given the 100°F+ summers and intense UV, catching underlayment degradation early prevents the costly deck damage that drives replacement costs up. Schedule at (877) 367-1429.
Ready to get your San Dimas roof done right? Call (877) 367-1429 now. A live person will answer, day or night, and we’ll get a uniformed, background-checked technician to your home for a free, photo-documented inspection. The price we quote is the price you pay - no surprises, no runaround. We’ve been standing behind roofs in this valley since 1984, and we’ll be here to stand behind yours.
Written by Cole Drummond, Owner at Ridgeline Roofing Co. of California, serving San Dimas since 1984.