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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
GAF Roofing in Fontana, CA | Brennan Roofing Co Riverside
We provide independent GAF roofing service across Fontana through our Roofing Company in Fontana, from shingle replacement to full tear-offs. The one thing that makes our GAF work different here is that we know exactly how these roofs fail in this specific climate: intense inland UV, Santa Ana wind gusts, and 50-to-70-year-old ranch homes that are hitting replacement age all at once. If you need GAF shingles matched, repaired, or replaced in Fontana, call (341) 208-3988 for a straight estimate in writing.
Why Fontana Residents Choose Us for GAF Service
We’ve torn off and re-shingled enough GAF Timberline and Royal Sovereign roofs across Fontana to know the difference between a roof with five good years left and one that needs to come off next month. That matters here because Fontana’s housing stock is dominated by 1950s-to-1980s tract homes, and a lot of those original GAF installs are now at or past their useful life. Travis Oakley and our crews have worked roofs all over the Inland Empire, and we’re familiar with every GAF line from Timberline HDZ to Glenwood. We use current GAF-branded shingles and matching ridge caps for tear-offs and most repairs, but we’ll also tell you plainly when an older discontinued GAF line can’t be matched factory-perfect and a close aftermarket dimensional shingle is the honest call. You get OEM-grade work without dealership markup, and the price goes on paper before any work starts.
Styles & brands we work with






Common GAF Roofing Problems We Solve in Fontana
- Granule loss and balding on south-facing GAF Timberline slopes. Fontana’s summer sun is relentless, and original 1990s Timberline installs are now shedding granules at a rate that leaves the asphalt mat exposed. You’ll see it first on slopes that face south and west. Once granule loss exceeds about 30 percent, patchwork stops making sense.
- Thermal cracking along GAF Royal Sovereign shingle edges. Decades of inland heat cycling, hot days followed by cool high-desert nights, makes those older three-tab shingles brittle. We regularly find cracked and snapped tabs on Fontana homes that were re-roofed once in the 1980s and are overdue again.
- Wind uplift and creased shingle tabs after Santa Ana gusts. The winds that blow through Fontana hit eaves and rakes hardest. We see Timberline tabs folded back or gone entirely, especially on low-pitch ranch roofs where the shingle edge catches the wind.
- Premature sealant strip failure on GAF architectural shingles. When the adhesive strip lets go, wind-blown shingles follow. It’s a common failure on Fontana’s many low-slope ranch roofs where water can pond just long enough to break down the seal.
- Decking rot underneath failed GAF roofs. By the time a Fontana roof has leaked through granule-loss bald spots or lifted tabs, the plywood underneath is often soft. We replace decking as needed, and the written estimate covers it before we touch the roof.
GAF Service in Fontana: What Local Conditions Mean for Your Equipment
Here’s something specific to Fontana: in the older neighborhoods north of Foothill Boulevard, scattered original wood shake roofs still survive, and they are now uninsurable. Insurance companies won’t write a policy on them. So homeowners are tearing off those old shakes and putting on GAF Timberline HDZ, the fire-resistant composition shingle that satisfies both the insurer and the city’s wildfire-adjacent building requirements. Travis grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College before spending the better part of two decades putting roofs on homes and commercial buildings across the Inland Empire. He knows how the heat and Santa Ana winds here test materials in ways that coastal jobs simply don’t. A roof should outlast the paperwork, not the other way around. On a 1962 ranch on Palmetto Avenue north of Foothill, our crew tore off a failing GAF Royal Sovereign roof that had lost most of its granules and had three separate Santa Ana lift zones. We replaced heat-delaminated plywood decking, then installed GAF Timberline HDZ in Barkwood with new drip edge and synthetic underlayment. The homeowner had been denied insurance renewal, and the new GAF system cleared their underwriting in a week.
GAF Models & Products We Service in Fontana
We work on the full GAF lineup that’s common in Fontana: Timberline HDZ, Timberline Natural Shadow, Royal Sovereign, and Glenwood. For tear-offs and most repairs we use current GAF-branded shingles and matching ridge caps so color and profile stay consistent. When a Fontana home has an older discontinued GAF line, we source quality aftermarket dimensional shingles that match closely and tell you exactly what you’re getting before we order anything. This approach keeps turnaround fast for Fontana homeowners, since we’re not waiting on factory authorization or dealer-only parts. See our full GAF sales & service details for what we stock and what we order per job.
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AfterGAF Service Pricing in Fontana
GAF shingle replacement in Fontana typically runs $450 to $950 for a small repair, depending on how many shingles need pulling and whether underlayment or flashing is involved. A full GAF tear-off and replacement on a typical Fontana ranch home ranges from $9,500 to $18,000, driven by roof size, pitch, decking condition, and whether you’re upgrading to Timberline HDZ or staying with a budget line like Royal Sovereign. If we find rotted decking once the old shingles come off, that gets priced per sheet and is covered in the written estimate before work starts. No change orders at the door. Call (341) 208-3988 for an exact quote on our Roof Repair in Fontana, the estimate is free and it’s in writing.
Serving Fontana, CA - Our Local Coverage Area
We’re based in the Fontana 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 – GAF Roofing in Fontana
Can you match my existing GAF Timberline color if only one slope needs replacement? Yes, in most cases we can match current GAF Timberline colors exactly, because we use current GAF-branded shingles for repairs. If your roof is an older discontinued Timberline color, we’ll find the closest dimensional aftermarket match and show you a sample before we install anything. Call (341) 208-3988 and we’ll check what’s available for your specific color.
Why did my GAF shingles lose so many granules after only 15 years in Fontana? Fontana’s inland heat and intense UV exposure accelerate granule loss, particularly on south-facing and west-facing slopes. Original 1990s GAF installs are now hitting the point where the asphalt mat is exposed and the roof is no longer shedding water reliably. Once granule loss passes roughly 30 percent, patching is throwing money at a roof that’s already done. Call (341) 208-3988 for a free estimate on replacement before the next heavy rain.
My insurance company wants me to replace my old GAF roof before renewal. Can you help with documentation? Yes. We provide the documentation insurers typically need: photos, a written scope of work, and confirmation of the new material type and fire rating. This is common in Fontana right now, especially north of Foothill Boulevard where older wood shake and failing composition roofs are triggering non-renewals. A GAF Timberline HDZ tear-off clears underwriting in most cases. Call (341) 208-3988 and we’ll walk you through what your insurer needs.
Do you install GAF Timberline on low-slope ranch roofs common in older Fontana neighborhoods? We do. Timberline HDZ is rated for use down to the low slopes you find on Fontana’s 1950s-1980s ranch homes, and we install it with proper underlayment and drip edge so the sealant strip does its job. We’ll check your pitch during the estimate and tell you if your roof needs any extra preparation before shingles go on.
Is a full GAF tear-off worth it for a 1980s Fontana tract home that already had one re-roof? If the home had one re-roof, the current roof is likely 25-35 years old. That’s beyond the reliable service life of most composition shingles, and Fontana’s heat and wind have done their work. A full tear-off gets you a fresh deck inspection, new underlayment, new drip edge, and a GAF system that clears insurance and appraiser checklists. The written estimate covers everything before we start, and the 365-Day Done Right Promise backs the work in writing. Call (341) 208-3988 for a free quote.
Service Areas Near Fontana
We serve Fontana and the surrounding Inland Empire communities, including Fontana service area details for every neighborhood we cover. You’ll also find us regularly roofing in GAF service in Rancho Cucamonga and GAF service in Riverside, along with Corona, Hemet, and Menifee.
Book Your GAF Service in Fontana Today
Call (341) 208-3988 and a live person answers, plain and simple. We’ll schedule a free estimate on your Fontana roof, put the price in writing before any work starts, and stand behind the job with the 365-Day Done Right Promise.
Written by Travis Oakley, Owner at Brennan Roofing Co Riverside, serving Fontana and the Inland Empire.