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GAF Construction in Highgrove, CA | Stallion Contractors
We provide independent GAF roof installation, repair, and replacement across Highgrove. The thing that makes our GAF work here different is simple: we deal with Riverside County permitting, Santa Ana wind exposure, and rural plot conditions every week, so we install Timberline systems with those realities in mind, not a generic checklist. Call (855) 600-3192 for a free estimate on any GAF project.

Why Highgrove Residents Choose Us for GAF Service
We’ve worked with GAF Timberline and dimensional shingle systems on enough Highgrove roofs to know how they actually behave under Inland Empire heat, wind, and flash-flood debris. We’re not GAF-authorized or manufacturer-sponsored. We’re an independent GAF sales & service contractor who installs, repairs, and honestly advises on their products because the material record warrants it. When our crews show up to a mid-century single-family home off Barton Road or along the I-215 corridor, they already know what to expect: aging decking, original edge metal, and shingles that have been through twenty-plus Highgrove summers.
Ruben Montoya, our owner, grew up in Colton and learned construction at San Bernardino Valley College, where the hands-on programs put him on real job sites before he ever carried a business card. His father was a finish carpenter, and that’s part of why our crews still pay more attention to the final ten percent of a GAF install than most contractors pay to the first ninety. Good work doesn’t need a sales pitch; it needs the right materials and someone who knows what they’re doing.
Styles & brands we work with







Common GAF Construction Problems We Solve in Highgrove
- Wind-lifted or torn Timberline tabs. Santa Ana events hit Highgrove’s edge lots harder than most people expect. We see tabs curled back where attic venting and edge metal were never upgraded, and we repair them with GAF starter strips and matching ridge cap rather than aftermarket patch pieces.
- Nail-line cracking and mat failure. The hot-dry cycle here, 100°F-plus summers followed by cool winter nights, stresses the mat under older Timberline shingles. Cracks along the nail line signal the shingle is losing structural integrity. We check for this before recommending any repair.
- Granule loss from flash-flood debris. Wash-adjacent yards in Highgrove catch seasonal storm debris. Branches and gravel scouring the roof surface strip granules and break sealed tabs. That degrades weathering performance fast, and we evaluate whether a spot repair is enough or the roof has reached replacement age.
- Flashing and valley failures on mid-century homes. Many Highgrove homes were built in the 1950s and 60s. GAF shingles laid over original framing with inadequate underlayment eventually leak at valleys and flashings, even when the shingles themselves look fine. We rebuild those transitions properly.
- Low-slope porch and addition leaks. Older Highgrove layouts often include flat or low-slope porch roofs. GAF Liberty SBS self-adhered membrane handles those conditions, but it has to be installed as a system, not patched piecemeal.
GAF Service in Highgrove: What Local Conditions Mean for Your Equipment
Because Highgrove is unincorporated Riverside County, a GAF roof replacement here is permitted through Riverside County Building & Safety rather than a city department. That changes the job in ways crews from Riverside or San Bernardino don’t anticipate. On the rural parcels with private wells and septic systems, our crews document well and septic locations before roof tear-off starts. If a shingle bundle pallet or a dump trailer gets placed over a septic leach field, the sitework bill climbs fast and the county environmental health sign-off gets complicated. We’ve walked enough Highgrove properties to know that the county planner reviewing your permit is the same authority reviewing your septic clearance, so we sequence the roof scope and the sitework scope together, unlike a typical GAF repair in Rubidoux. That’s not something a city-only roofer has to think about, and it’s exactly the kind of thing that turns a “simple” roof replacement into a stalled permit if it’s missed.
GAF Models & Products We Service in Highgrove
We install and repair the full GAF Timberline lineup: HDZ architectural shingles, UHDZ for the deeper profile, and Natural Shadow where a softer dimensional look fits the house. For low-slope porch and addition roofs common on older Highgrove lots, we use GAF Liberty SBS self-adhered membrane. Our parts approach is simple: GAF starter strips, ridge cap, and hip-and-ridge on every system we touch, because those are the pieces tied to the GAF service in Loma Linda warranty. We stock common Timberline colors and accessories in our yard so a Highgrove repair doesn’t wait on a distributor order.
See the difference
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AfterGAF Service Pricing in Highgrove
Every estimate we provide is line-item, so you see exactly what the roof scope costs before any work starts. Highgrove projects on older homes sometimes run higher than tract housing because decking repairs, septic-aware sitework, and county permit sequencing add scope. But the shingle and system pricing stays consistent with the market. Here’s where typical GAF work lands:
| Service | Typical Highgrove Range |
|---|---|
| Roof Replacement | $8,000 – $20,000 |
| Roof Repair | $400 – $1,800 |
| Metal Roof Installation | $15,000 – $40,000 |
| Tile Roof Repair | $600 – $2,500 |
The variables are roof size, pitch, decking condition, and whether we’re pulling Riverside County permits with septic/well documentation. Call (855) 600-3192 and we’ll walk the roof with you before quoting anything.

Serving Highgrove, CA — Our Local Coverage Area
We’re based in the Highgrove 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 Construction in Highgrove
You pull from Riverside County Building & Safety, not a municipal department. Highgrove has no city hall handling building permits. We handle that paperwork for you, including the separate county environmental health sign-off when well or septic locations are part of the project scope.
Yes, when installed to GAF’s high-wind spec with the correct number of nails and the right starter strip. The failures we see on edge lots almost always trace back to shortcuts: skipped nails, missing edge metal, or vents that let wind pressurize the attic from inside. We install to the high-wind standard every time on Highgrove’s exposed lots. Call (855) 600-3192 if you want us to check your roof before the next Santa Ana season.
We check every sheet. If the decking is sound, we leave it and install over it. If there’s rot or delamination, we replace only the affected sections rather than charging you for a full re-deck that isn’t needed. You’ll see the decking condition documented in your estimate.
Often, yes. If the shingles still have weathering life and the structure passes inspection, we repair with GAF matching accessories and leave the rest of the roof alone. But on a roof past its warranty life with wide mat failure, patching just delays a re-deck and costs you more over time. We’ll tell you straight which situation you’re in.
They matter a lot. Edge lots near dry brush and open parcels need Class A fire-rated shingles, which GAF Timberline provides, plus vent screening and eave details that keep wind-driven embers out. We factor those requirements into any Highgrove edge-lot roof scope rather than treating them as an add-on. Call (855) 600-3192 for an exact quote; estimates are free.
Service Areas Near Highgrove
We also provide GAF service across the surrounding Inland Empire communities. Highgrove service area coverage extends naturally into Colton, Grand Terrace, Loma Linda, and Redlands. If you’re in the hills above Upland, see GAF service in Upland, or GAF service in Sunnyslope for coverage on that side of the valley.
Book Your GAF Service in Highgrove Today
Call (855) 600-3192 to schedule a free roof walk and line-item estimate. We’ll assess your GAF roof against Highgrove’s specific wind, heat, and county permitting conditions, then give you a straight answer on repair versus replacement.
Written by Ruben Montoya, Owner at Stallion Contractors, serving Highgrove and the surrounding Inland Empire from Grand Terrace GAF service.