Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
GAF Construction in Ontario, CA
We’re an independent GAF roofing contractor working the Inland Empire corridor, and our crews install and repair GAF shingle, tile, and low-slope systems here in Ontario, CA on a weekly basis. What makes our GAF work different in this city comes down to one thing: we diagnose roofs against Ontario’s specific wind and heat conditions, not a generic manual. Sundance Contractors provides full-scope GAF service in Montclair and across Ontario ZIPs 91762, 91764, 91798, and 91758. Call (877) 752-3951 for a free estimate.
Why Ontario Residents Choose Us for GAF Service
Homeowners in Ontario don’t need a contractor who’s heard of GAF. They need someone who knows which GAF products survive a Santa Ana wind season off the Cajon Pass, and which ones will be back on the roof again by December. That’s the difference between a roofer who slaps on shingles and a contractor who builds for this specific climate.
Noel Carranza, our owner, grew up in Yorba Linda and worked through every phase of residential and commercial construction across Orange County and the Inland Empire before starting Sundance Contractors. His crews handle GAF systems daily: Timberline HDZ and UHDZ architectural shingles, Grand Sequoia designer profiles, and EverGuard TPO for low-slope and flat sections. We use genuine GAF shingles, sealants, starter strips, and ridge products when the existing system is GAF. That’s how the roof keeps its intended wind and water performance. For broader reach, see our GAF sales & service page covering the full service area.
Styles & brands we work with
- Kitchen remodeling
- Bathroom remodeling
- Home additions & ADU
- Roofing
- Windows & doors
- Driveway & pavers
- Fence
Common GAF Construction Problems We Solve in Ontario
- Santa Ana wind uplift on Timberline HDZ ridge and eave courses. When a fast summer install doesn’t let the sealant strip fully set, the first strong wind event off the Cajon Pass lifts and creases tabs. We reset and re-fasten these courses to GAF spec before the whole field starts peeling. Roof repair for this ranges from $400 to $1,800.
- Granule loss and curling on south- and west-facing slopes. Ontario’s hot, dry summers bake asphalt shingles relentlessly. South and west exposures get the worst of it. We often find granule loss that signals the shingle has lost its UV protection and needs replacement before water follows.
- Blown-off hip and ridge shingles. Ridge caps are the first failure point on architectural roofs in this market. These take the full brunt of wind from the north and east, and nailed-only ridge caps don’t hold. We replace and re-seal the entire ridge line rather than patching single caps that’ll fail again next season.
- Flashing and sealant failures at chimneys, valleys, and pipe boots. Older stucco-slab homes in ZIPs like 91762 and 91764, many with original 1990s installs, are now past their service life. We see premature flashing breakdown where the original work didn’t account for Ontario’s wind-driven rain.
- Low-slope and flat-roof membrane issues on attached additions. Ontario’s postwar tract homes often have flat-roof sections over additions, porches, or converted garages. EverGuard TPO is our standard recommendation for these because it handles thermal movement better than older roll roofing.
GAF Service in Ontario: What Local Conditions Mean for Your Equipment
Here’s the thing about Ontario you won’t find on a manufacturer’s spec sheet. The Santa Ana winds funnel off the Cajon Pass and hit roofs from the north and east. That’s the exact exposure where nailed-only GAF architectural tabs lift. A fast summer install that skips proper sealing and ridge fastening won’t survive the first fall wind event, and that pattern shows up across the postwar homes in 91762 and 91764. We saw it on a tract home off Euclid Avenue: a 1990s GAF Timberline roof with north- and east-facing ridge caps torn loose and creased after one wind event, plus heat-curled shingles on the west slope. Our crew reset and re-fastened the ridge, replaced the lifted field shingles with matching Timberline HDZ, and re-sealed ridge and eave strips to GAF spec so the roof held through the next season. That’s the level of local diagnosis you get with Sundance.
GAF Models & Products We Service in Ontario
We work on all major GAF product lines. Timberline HDZ and UHDZ architectural asphalt shingles are what we most often install on Ontario’s residential roofs, particularly the mid-century stucco-and-slab homes in 91762 and 91764. Grand Sequoia designer shingles come up on higher-end master-planned communities and custom homes. EverGuard TPO handles low-slope and flat sections, including the warehouse and distribution center work that defines Ontario’s I-10 and I-60 corridor. For repairs, we match the closest GAF profile and shading rather than tearing off a good slope. When the existing system is GAF, we use genuine GAF sealant, starter, and ridge products to preserve the roof’s wind and water performance.
See the difference
Before
After
Before
After
Before
AfterGAF Service Pricing in Ontario
Pricing reflects the scope, the GAF product line, and the condition of the existing deck. A small wind-damage repair is a few hundred dollars. A full replacement across a larger Ontario home runs higher. Here’s what we quote in this market:
| Service | Typical Range in Ontario |
|---|---|
| Roof Replacement | $8,000 – $20,000 |
| Roof Repair | $400 – $1,800 |
| Metal Roof Installation | $15,000 – $40,000 |
| Tile Roof Repair | $600 – $2,500 |
What drives the cost: roof size and slope, the GAF line you select, how much deck and underlayment needs replacing, and whether we’re doing a full tear-off. Your free estimate from Sundance includes a written line-item scope, current roof condition notes, and an honest take on GAF repair in Chino or replacement. Call (877) 752-3951 for an exact quote, estimates are free.
Serving Ontario, CA - Our Local Coverage Area
We serve Ontario and nearby communities. Also see GAF in Los Serranos. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – GAF Construction in Ontario
Only if they were installed incorrectly, which unfortunately happens often enough that we see it every fall. Properly sealed Timberline HDZ shingles hold in Ontario’s wind conditions. The failure we diagnose is nailed-only tabs with the sealant strip never fully set, often after a fast summer install. A post-installation inspection from Sundance will tell you whether your roof is wind-ready. Call (877) 752-3951 to book one.
Expect 15 to 25 years depending on slope orientation, attic ventilation, and whether the original install was done to spec. South- and west-facing slopes in Ontario lose granules faster. If your roof has older Timberline without proper ridge venting, the heat’s already taken years off its life. We’ll give you a straight answer on what your roof can still handle.
Yes, if the field shingles are still sound and the deck isn’t compromised. We reset and re-fasten ridge caps, replace lifted and creased tabs with matching GAF profile, and re-seal the eave and ridge strips. If the ridge damage is too extensive, or the field shingles have granule loss across large areas, full replacement becomes the smarter spend. We’ll tell you which one applies to your roof, not sell you the bigger job by default. Call (877) 752-3951 for a ridge inspection.
Yes. EverGuard TPO is our standard on low-slope and flat sections, including attached additions on tract homes and the distribution center work along the I-10 corridor. TPO handles thermal movement in Ontario’s hot summers better than older roll roofing, and the white membrane reflects heat rather than absorbing it. We can also match TPO to existing GAF systems.
Repairs range from $400 to $1,800. Full replacement runs $8,000 to $20,000 depending on roof size and GAF product line. Metal installation is $15,000 to $40,000. Tile roof repair runs $600 to $2,500. Every quote is line-itemed and written before work starts. Call (877) 752-3951 for an exact quote.
Service Areas Near Ontario
We serve Ontario and the surrounding Orange County and Inland Empire communities. If you’re in Yorba Linda, see our GAF service in Yorba Linda. In Placentia, we cover that area through GAF service in Placentia. We also work in Villa Park, Brea, Fullerton, and Anaheim. Check our Ontario service area page for full coverage details.
Book Your GAF Service in Ontario Today
Do it right the first time, the second time costs twice as much and nobody’s happy about it. If your GAF roof needs a repair, a wind inspection, or a full replacement in Ontario or La Verne GAF service, call Sundance Contractors at (877) 752-3951. We’ll schedule your free estimate and get your roof wind-ready.
Written by Noel Carranza, Owner at Sundance Contractors, serving Ontario since 2004.