Metal roofing
Architectural shingles
Tile roofing
GAF
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Montclair
Roof replacement in Montclair usually runs between $9,800 and $18,500 depending on roof size, pitch, decking condition, and material grade. We’re Millstone Roofing, led by Nelson Ibarra, and we’ve worked on enough 91763 tract homes to know that most replacements here are not simple shingle swaps. That’s not a sales pitch. That’s what the housing stock tells us every time we tear off a roof and look at what’s underneath. Call (855) 341-6021 to schedule a free estimate, and we’ll give you a straight answer about what your roof actually needs.
Why Millstone Roofing Is Montclair’s Preferred Roof Replacement Company
We inspect before we recommend. That’s the rule, and it matters more in Montclair than almost anywhere else in the Inland Empire. Nelson Ibarra built Millstone Roofing around the idea that a roofer should be able to show you exactly what’s failing, in writing, before you sign anything. So when a Montclair homeowner calls us about a new roof, the first thing we do is get on the roof and document what’s there: decking condition, ventilation, drainage, flashing, and the existing underlayment. Then we hand you the findings. No guesswork.
That approach has earned us a strong local reputation among Montclair homeowners who are tired of door-knocker crews and one-brand pitches. We carry materials from seven manufacturers, including GAF, CertainTeed, and Owens Corning. That means when we recommend a product, it’s because it fits your roof and your budget. Not because we have a supplier quota to hit. And because we handle inspection, repair, and full Roof Replacement ourselves, you’re never handed off between companies halfway through the job.
Styles & brands we work with
New Roof Installation in Montclair
New Roof Installation in Montclair needs to account for the specific way these homes were built. A lot of the south side of 91763 went up in the 1950s and 60s with flat or low-slope built-up roofs and shallow attic space. When a homeowner gets a true new roof on one of these houses, the scope usually includes decking repair, a modern self-adhered underlayment, re-sloped drainage where the original taper has failed, and reflective coating on the flat sections. A straight shingle overlay over an original low-slope deck is exactly the kind of shortcut that causes problems later.
Asphalt shingle new roof installation on a standard Montclair ranch can run $9,800 to $14,500. Architectural shingles typically add $1,800 to $3,200 depending on the roof’s square footage and pitch. Flat roof sections with modified underlayment and reflective coating typically run $7 to $10 per square foot, including decking prep. These are honest ranges, not quotes. Your actual number depends on what we find when we inspect.
Full Tear-Off and Decking Inspection
We pull the old roof completely, so we can see the sheathing. On Montclair tract homes from the 1950s through 1970s, this often means exposing original skip sheathing. If the wood has cupped, sagged, or lost fastening bite, we replace the compromised sections before anything new goes down. Burying soft decking under a new roof is how you get a five-year failure on a thirty-year product.
Ventilation and Underlayment Upgrades
Inland Empire heat attacks these roofs from both sides. Surface UV breaks down shingle granules, and attic heat bakes the decking from below. We upgrade ventilation on nearly every new roof we install in Montclair: ridge vents, soffit intake, sometimes powered exhaust on the flat sections. We also lay self-adhered underlayment through valleys and penetrations. On south-facing slopes especially, this is the difference between a roof that lasts and a roof that curls in seven years.
Reroofing in Montclair
Reroofing in Montclair means replacing the roof on a home that already has one, and the question is always whether the existing deck can support a second system. Montclair has thousands of single-story ranches and tract homes from the 1950s through 1970s with composition shingle or built-up flat roofs. Some still have their original sheathing. We inspect that decking before we quote anything. If the deck is solid and the existing roof isn’t trapping moisture, a reroof can work. If the deck is compromised from decades of UV and thermal expansion, a full tear-off is the honest recommendation.
A typical reroof on a Montclair ranch home runs $10,500 to $16,800, including decking repairs where needed. Flat and low-slope reroofs with proper underlayment and reflective coating run $7 to $11 per square foot. The largest cost variable is decking: homes that need extensive sheathing replacement will land on the higher end, and we’ll show you exactly what we found before you authorize anything.
Skip Sheathing and Decking Repair
Original skip sheathing is common in Montclair’s older tract homes. The gaps between boards are fine for old built-up roofs, but they’re not a proper nailing surface for modern shingles or architectural systems. We inspect every section, replace what’s cupped or delaminated, and ensure the fastening surface is solid before installation.
Flat and Low-Slope Reroof Systems
The south side of 91763 has more flat roofs than most cities in this part of the Inland Empire. A compliant reroof here means a modern underlayment, proper drainage slope, and typically a reflective coating that cuts attic heat gain. We don’t just drop new cap sheet over old and call it done. We address the drainage and ventilation underneath, because that’s what keeps the new roof from failing the way the old one did.
Trusted Brands We Service in Montclair
We stock materials across multiple manufacturer lines, including GAF, CertainTeed, Owens Corning, and Boral. That puts Montclair homeowners in a different position than most: you’re choosing from recognized brand programs, not whatever a single-dealer roofer has in the warehouse. Manufacturer-backed warranties are available through the brand’s own programs, so your protection isn’t tied to whether one crew stays in business. And because we regularly source these brands for jobs across the Inland Empire, turnaround on material ordering for Montclair jobs is fast. Your roof, your choice.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Montclair Homes
- Original skip sheathing covered over, not inspected. This is the most expensive shortcut we see. A cheap bid lays new underlayment over old decking, and six months later fasteners are pulling loose because there wasn’t solid wood to bite into. We tear off to the deck and replace what’s compromised.
- South-facing slopes dying early from attic heat. After a hot day, roofs on the south-facing slopes of 91763 tract homes often show premature granule loss and curling because attic temperatures spike without proper ridge vents. The fix is ventilation, not just thicker shingles.
- Flat sections ponding water and cracking. Winter rains hit low-slope roofs hard when the original taper has failed. Ponding water works into seams, and thermal expansion cracks open at the edges. A proper replacement re-slopes the section and uses modern underlayment designed for standing water resistance.
- Shallow ventilation never upgraded from original construction. The 1950s and 60s homes were built with minimal ridge and soffit airflow. Without an upgrade, any new roof system runs hotter and ages faster. We fix the ventilation as part of the replacement, not as an add-on.
Pricing for Roof Replacement in Montclair, CA
Asphalt shingle roof replacement on a typical Montclair ranch runs $9,800 to $14,500. Architectural shingle systems with upgraded underlayment run $12,000 to $18,500, depending on tear-off depth and decking condition. Flat roof replacement with reflective coating runs $7 to $10 per square foot. The largest variable is decking replacement, and we won’t know that number until we tear off. Call (855) 341-6021 for a free estimate and a written line-item quote. No change orders mid-job; the price we quote is the price we build to.
We Also Serve Cities Near Montclair
Millstone Roofing handles roof replacement and repair across the eastern Inland Empire. We regularly work in Montclair and the surrounding cities: Claremont, Ontario, Upland, La Verne. If you’re in a neighboring community and need a straight assessment, call (855) 341-6021. We’ll come out, inspect, and give you documented findings before any work is quoted.
Serving Montclair, CA — Our Local Coverage Area
We’re based in the Montclair 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 About Roof Replacement in Montclair
Montclair sits in a region where local building codes call for roof systems rated for Class F or better in most residential applications, meaning installation must follow the manufacturer’s high-wind nailing pattern and use the specified underlayment and fastening schedule. A compliant quote includes the manufacturer’s wind-rated installation method, verified decking fastening, and documentation we can provide if your insurance asks for it. Cheap bids often skip the extra fasteners and underlayment details that make the rating real. Call (855) 341-6021 and ask us to show you the difference in writing.
Because the original design was a low-slope built-up roof with shallow attic ventilation, and Southern California’s thermal conditions are unrelenting on that system. On a 1950s ranch off the south side of 91763, our crew tore off a failing built-up flat roof and found original skip sheathing that had cupped under years of Inland Empire UV and thermal expansion. We replaced the compromised decking, laid self-adhered underlayment and ice and water shield through the valleys and penetrations, built up a proper tapered slope to the existing fascia and drip edge, and paired it with a reflective coating plus new soffit and ridge venting so the south-facing slope stops cooking the attic. That’s what a true replacement looks like on these homes.
Line-item the bids. Look for decking inspection and replacement allowances, underlayment specification, ventilation scope, and drainage work on flat sections. A bid that doesn’t mention decking replacement or ventilation is probably going to hit you with a change order once the old roof comes off. We give you a written quote with all of this itemized before work starts. The price is the price.
Yes, in practical terms. Insurers respond to documentation: proof the decking was inspected, the underlayment met current code, the ventilation was upgraded, and the wind-rated installation was followed. We photograph and document every phase, which gives you a paper trail if you ever need to file a claim or show an adjuster what was actually done. Call (855) 341-6021 and we’ll walk you through what we document and why.
The decking. The ventilation. The drainage. The existing underlayment. If a roofer quotes your 91763 replacement without getting into the attic and walking the entire roof surface, you’re getting a number, not an assessment. We inspect first, document what we find, and only then put numbers in front of you. That’s how Nelson Ibarra built Millstone Roofing, and that’s how we operate on every Montclair job.
Written by Nelson Ibarra, Owner at Millstone Roofing, serving Montclair and the eastern Inland Empire.