Roof Installation in Montclair - Free Inspection, Itemized Written Quote

Fast, Reliable Roof Installation Across Montclair

A new roof installation in Montclair runs $9,500 – $18,000 for a typical 1,400 – 2,200 sq ft single-story Ranch home, with most projects completed in 3 – 5 working days once materials are staged. If you’re calling from the north side near the Pomona Valley foothills or the tract neighborhoods south of the 10, we know exactly what your roof has been through: Santa Ana winds, 105°F summers, and decades of thermal cycling that punish shingles, flashing, and decking in ways coastal contractors never see. Call (743) 200-8347 and a live person answers, 24/7. We’ll send a technician whose name and photo arrive before they do, and you’ll get a written price before a single nail comes off the truck.

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Why Mercer Roofing Is Montclair’s Preferred Roof Installation Company

Montclair homeowners tell us the same thing again and again: they want to know who’s coming to the door. We solve that before the estimate ever happens. Every Mercer technician is background-checked, identity-verified, and badged under the Threshold Verified standard. You get a name and a photo sent to your phone before we arrive, and when we knock, we’re in a clean, marked uniform holding a photo ID at the door. No guessing. No stranger-at-the-door moment.

We’ve torn off enough 1960s and 70s Ranch roofs in Montclair to know exactly what hides under the shingles: cement-only ridge caps, missing ice and water shield, corroded flashing at the valleys, and decking that’s been baking for 60 years. Our crew works these Pomona Valley foothill streets weekly, and we’re typically on-site for a full inspection within a day or two of your call. Every roof installation includes a written price before any work starts, and every job carries the 365-Day Done Right Promise: if it’s not right within a year, we make it right, in writing.

Founded in 2000 and part of the Threshold Group family, each Mercer Roofing location is independently owned and operated but held to the same Threshold Verified standard on every visit. Led by Grant Whitlock, our team dispatches from the Inland Empire office and crews serve Montclair locally. When a Santa Ana event cracks ridge caps on your street, you’ll be glad the crew knows which shortcuts the original builders used here in San Bernardino County.

Roof Flashing Installation in Montclair

Roof flashing installation in Montclair fixes the metal joints where your roof meets a wall, chimney, skylight, or valley, and on most local Ranch homes it’s the first thing that fails after decades of 105°F days and cold desert nights. A typical flashing replacement or repair on a Montclair home runs $350 – $1,200 depending on how many penetrations are involved and whether the old flashing has corroded through the surrounding decking. If you see water staining near a chimney or along a wall-roof junction, flashing is the prime suspect, and on Montclair’s low-slope Ranch roofs, it often fails years before the shingles look worn.

Valley Flashing on Low-Slope Ranch Roofs

Valleys are where two roof planes meet, and they channel more water than any other part of the roof. On Montclair’s Ranch-style homes with shallow pitches, water moves slowly through valleys, giving it more time to find any gap in corroded metal. We routinely peel back old valley flashing on these houses and find the metal pitted through from decades of thermal expansion and contraction, with the underlayment beneath it cracked and brittle.

Chimney and Skylight Flashbacks

Chimney flashing on a Montclair home usually needs replacement by year 15 or 20, faster if the original installer used cheap galvanized metal instead of a heavier gauge or stainless. Skylight flash kits fail in the same way: the seal breaks down under intense UV exposure, then a January rain finds it. We replace both with properly lapped, mechanically fastened flashing and re-bed the shingle course above it so water moves over the metal instead of under it.

TPO Roofing Installation in Montclair

TPO roofing installation in Montclair gives flat and very low-slope sections a heat-reflective, seam-welded membrane that handles the Inland Empire’s solar load better than older built-up or modified bitumen roofs. TPO re-roofing on a Montclair home typically costs $7 – $9 per square foot installed, which puts most residential flat sections or patio covers in the $2,800 – $7,500 range. The reflectivity matters more here than you’d think: Montclair’s Title 24 cool-roof standards push re-roof permits toward compliant materials precisely because unreflective roofs drive attic temperatures higher, and higher attics mean harder-working air conditioners.

Heat-Welded Seams vs. Taped Seams

We heat-weld every TPO seam rather than rely on adhesive tape, because Montclair’s summer heat breaks down adhesive bonds faster than almost any other roof condition. A welded seam becomes one continuous membrane; a taped seam is a bond waiting to fail. The difference is measurable in years of service, and on a flat roof with standing water after a storm, seam integrity is the entire ballgame.

When a Ranch Cartoon Roof Needs TPO Instead

Most Montclair Ranch homes have pitched shingle roofs but many have flat porch roofs, patio covers, or additions built later with nearly no slope at all. Those low-slope sections pool water, and water pooling is what kills membranes. If your flat section shows blistering, cracking, or ponding after rain, a TPO replacement with proper slope correction and positive drainage is the fix that outlasts three more coats of roof coating.

Trusted Brands We Service in Montclair

We install and repair shingle roofs using manufacturer-recognized brands including GAF, Atlas, and Tamko, and we stock common flashing, ridge cap, and underlayment materials that match the dominant 3-tab and architectural shingle profiles found on Montclair’s 1950s – 70s tract homes. When a specific color blend or ridge profile is backordered at distributors, we’ll tell you the lead time in writing before you sign anything. For TPO membranes, we work with proven commercial-grade systems rated for Inland Empire UV exposure. No generic substitutes, ever. The warranty from the manufacturer stays with the home, and our 365-Day Done Right Promise covers the workmanship on every installation.

Common Roof Installation Problems We See in Montclair Homes

• Cement-only ridge caps. Original 1960s – 70s installs in San Bernardino County often bedded ridge caps in roofing cement with no mechanical fasteners. A Santa Ana event peels them right off, and we’re called out after every major wind event to replace caps that should have been nailed down from day one.
• Missing ice and water shield in valleys. Most Montclair Ranch roofs were built before ice and water shield was standard practice. The valleys and penetrations rely on aged felt and tar, which cracks under repeated 105°F thermal cycling and leaks within a decade of the last re-roof.
• Low-slope decking rot at roof-to-wall junctions. Ranch homes have shallow pitches, and where the roof meets a wall or chimney, water hangs around long enough to rot the decking under the flashing. We often find dry rot in these junction points that’s invisible from the ground and only appears when the old flashing comes off.
• Fastener back-out on original decking. The original 1960s nails holding decking to rafters on Montclair tract homes are backing out from 60 years of expansion and contraction. Renailing or re-screwing the deck to meet current wind uplift standards is part of almost every full re-roof we bid here, and skipping it leaves a roof that sounds fine but isn’t.

Pricing for Roof Installation in Montclair, CA

We Also Serve Cities Near Montclair

From our Inland Empire dispatch office, we run installations through all of western San Bernardino County. Beyond Montclair, our crews handle Roof Installation in Roof Installation for homes in Claremont, Ontario, Pomona, and La Verne. Same Threshold Verified standard everywhere: background-checked technicians, photo ID at the door, and a written price before any work starts.

FAQs About Roof Installation in Montclair