Commercial Roofing in San Jose, CA

Name: San Jose Roof Repair
Telephone: 6504145505
Price range: $$

San Jose Roof Repair keeps low-slope rooftops watertight through dry, sun-blasted summers and the winter rain storms that stress every membrane in the valley. Call 6504145505 and we'll walk your building and tell you straight whether a coating buys five more years or you need a tear-off.

Call 6504145505

Commercial roofing covers the low-slope side of the trade: flat and nearly flat rooftops protected by a membrane instead of shingles. System selection comes first, and it drives everything after.

TPO and PVC single-ply membranes are the white, heat-welded sheets you see on warehouses and retail strips. EPDM is the black rubber membrane that shrugs off UV and keeps its flexibility in the cold.

Modified bitumen installs in torch-applied or self-adhered rolls. Built-up roof, or BUR, layers roofing felt, tar, and asphalt bitumen in alternating plies before a gravel finish goes on top.

We install Carlisle SynTec, GAF EverGuard, Firestone, Johns Manville, and Versico systems, with 15 to 30 year no-dollar-limit warranties when the specification allows.

Every job starts with a roof asset survey: a moisture scan across the roof deck, core samples of the insulation, and a close look at the parapet, scupper, coping, and drains where leaks actually start.

From there we price a tear-off, a recover over the existing membrane, or an overlay when the substrate is sound and the budget says buy time.

Cost depends on square footage, how many layers come off, insulation value, and building code requirements around edge metal, ventilation, and anchoring.

Crews work off scaffold with an anchor point and a safety harness whenever they are above the roofline. Tenant coordination happens before the dumpster and debris hit the lot.

Mid-century ranch homes from the 1950s-1960s, Spanish Colonial Revival architecture from the early 1900s, and Contemporary suburban developments built since 2000 all show up with low-slope sections: a garage roof, a dormer, or a shaded overhang where moss likes to sit.

What's Included

Roof asset survey with a moisture scan of the roof deck and core samples of the insulation, so we know what's wet before we quote.
System selection across TPO, EPDM, PVC single-ply, modified bitumen, and built-up roof, with manufacturer options from Carlisle SynTec, GAF EverGuard, Firestone, Johns Manville, and Versico.
Tear-off, recover, and overlay pricing on one page, so you can weigh landfill cost against another layer over an existing membrane.
New step flashing, counter-flashing, apron flashing, and boot flashing at every penetration, plus sealant at the parapet, scupper, coping, and drain.
Insulation and vapor barrier upgrades that meet current building code, with ridge vent, soffit vent, and attic fan checks to cut energy efficiency losses on a sun-baked rooftop.
Residential crossover work on sloped sections: synthetic underlayment, an ice-and-water shield in the valley, drip edge at the eave and rake, and a ridge cap or snow guard where it belongs.
Gutter repair and gutter installation, with downspouts set so water leaves the fascia and soffit instead of backing up under the eave.
Standalone roof inspection with photos, a written roof estimate, and insurance claim assistance if a winter storm caused the damage.

Our Commercial Roofing Process

What Happens After You Call Us

Phone call. We ask about the building, the leak history, and whether tenants are affected, then book a walk-through.
Roof asset survey. We get on the rooftop with a ladder or scaffold, photograph every detail, and take a moisture reading of the deck and insulation.
Written scope. Your roof estimate comes itemized: square counts, tear-off layers, membrane options, flashing, insulation, and any code upgrades.
Insurance paperwork. If a storm caused the damage, we document the storm date and give your adjuster a scope that matches the real repair.
Scheduling. We confirm dates with the property manager, place the dumpster, and lay out a debris plan before anyone arrives.
Install day. Tear-off or recover, new underlayment, insulation, and membrane, worked in staggered courses so the building stays dry overnight.
Final walk. Photos, warranty paperwork, and a maintenance plan you can hand to whoever handles the building next.

Roof Asset Survey

We document existing membrane, slopes, drainage, and penetrations across the entire San Jose roof. Photo and measurement record stays on file for your facility's history.

Specification & Quote

System recommendation matched to your building (TPO, EPDM, modified bitumen) with manufacturer-approved details, NDL warranty terms, and tenant coordination plan.

Phased Install

Crews work in zones to minimize tenant disruption. Substrate prep, membrane placement, seam welding, and flashing termination follow ASTM standards every step.

Warranty Enrollment

Manufacturer inspection, drainage verification, and NDL warranty registration. Final documentation package delivered to ownership and property management.

Signs You Need Commercial Roofing

Warning Signs Your Rooftop Needs a Commercial Roofing Crew

Ponding water still standing 48 hours after a winter rain storm, which means the membrane has settled or a drain is plugged.
Coating that blisters, flakes, or peels off in your hand, a sign the surface has oxidized and UV degradation has eaten the finish.
Sagging between the joists or a soft spot underfoot, which usually means water has been wicking into the decking for weeks.
Rust streaks where water seeps through a fastener, or stained ceiling tiles inside after a storm.
Seams that delaminate, lifted laps along a field course, or adhesive that has simply let go.
Granule loss on an asphalt shingle section, or three-tab shingle that has curled and buckled on an adjoining sloped roof.
Moss or an algae film along the north-facing roofline, which our low humidity and long shade let hang around and hold moisture.
Loose fasteners, backed-out screws, or rusted edges on a metal panel or corrugated panel run.

Commercial Roofing — Frequently Asked Questions

How much does commercial roofing cost in San Jose?

Prices are quoted by the roofing square, and a single-ply recover on a small flat rooftop is the least expensive route. Cost climbs with tear-off layers, new insulation, and structural work, like a rotted rafter, a sagging truss, a wet joist, or a ridge beam that has to be sistered. You get a line-item roof estimate, not one lump number.

How long does a flat roof installation take?

A typical low-slope rooftop takes our crew two to five days, longer if we find wet insulation or have to replace plywood or OSB sheathing. We confirm the wet area with a moisture meter before we cut, set ladders, keep a pry bar and roofing shovel moving, and stage the dumpster off the parking lot. A nail gun and air compressor speed the fastening, and the torch only comes out for torch-applied modified bitumen.

Do you help with insurance claims after storm damage?

Insurance claim assistance is standard for us after a winter rain storm. We document the storm date, photograph the damage, and hand your adjuster a scope that covers the actual repair, including waterproofing and weatherproofing details that are easy to overlook. You file the claim; we handle our side of the paperwork.

Which roofing materials do you work with?

On steep sections we install architectural shingle, three-tab shingle, and asphalt shingle, plus wood shake, cedar shake, slate, clay tile, and concrete tile where the framing supports the weight. Flat sections get TPO, EPDM, modified bitumen, or a metal panel, corrugated panel, or standing-seam panel fastened to new purlins, battens, and counterbattens.

Does roof pitch change the work?

Roof pitch decides the whole approach. A low-slope section gets membrane, while a steep hip, gable, or mansard roof gets shingles or tile, and a gambrel, canopy, awning, or small overhang gets its own detail at the verge and rake. Ventilation runs underneath all of them.

How often does a roof need inspection?

A roof inspection every couple of years catches small failures before they spread, especially along the chimney flashing, pipe flashing, skylight, and gutter line. We reseal with a roofing sealant, caulk, mastic, or roof cement, swap a popped nail or loose fastener, and check the valley and ice-and-water shield while we're up there, even though an ice dam almost never forms here. It's a roof maintenance tip that saves real money.

Don't just take our word for it — hear from our satisfied customers.

"We manage a small retail building near the San Jose State University campus, and the flat section over the back units had been ponding for two winters. They ran a survey, showed us the wet insulation, and gave us a recover price and a tear-off price. We picked the recover. No leaks since."

Maria G., Downtown San Jose

"Our garage roof in Willow Glen is low-slope and always grew moss on the north side. They cleaned it, checked the deck, and recoated it. Two days of work, no debris left behind, and the gutters actually drain now."

Dave R., Willow Glen

"A winter storm pulled the flashing loose around our chimney and water came through a bedroom ceiling in Almaden Valley. They came out, tarped it, and had it sealed the next morning. Then they walked the roof with me and showed me what to fix later, not just today."

Priya S., Almaden Valley