Roof Replacement in San Jose, CA

What a Roof Replacement Involves

Roof replacement is the tear-off of your existing covering, a close look at the roof deck, and the installation of a complete new system from the eave up to the ridge. We strip every layer down to the sheathing so nothing old stays trapped underneath.

Then we check the substrate. If a rafter, truss, joist, or ridge beam shows rot or decay, we sister or replace that framing before anything covers it up. Skipping that step is how a new rooftop fails at year six.

The Layers of a Roofing System

Most homeowners picture a shingle and stop there. A finished roof is a stack of parts, and each layer handles a different job against water and wind.

• Roof deck: the plywood or OSB sheathing fastened to the trusses, which carries the weight of everything above it.
• Ice-and-water shield: a self-adhered membrane along the eave and valleys, where wind-driven rain backs up under the covering.
• Synthetic underlayment: replaces old tar paper and roofing felt with a stronger, tear-resistant layer across the field of the roof.
• Drip edge: the metal strip at the eave and rake that pushes water clear of the fascia instead of letting it wick backward.
• Valley flashing and step flashing: the metal where two roof planes meet, or where the roof dies into a wall, chimney, or dormer.
• Counter-flashing and apron flashing: the pieces that seal the top edge of a chimney or skylight so water cannot seep behind it.
• Pipe boot and vent boot: the rubber collars around plumbing stacks and exhaust vents, which crack and peel long before the shingles do.
• Ridge cap and ridge vent: the folded shingles and screened vent along the hip and ridge, closing the highest, most wind-exposed line on the house.

Roofing Materials We Install

Material choice drives cost, weight, and lifespan. We quote what fits your pitch, your framing, and how long you plan to keep the house.

• Architectural shingles: a heavier asphalt shingle with a layered look, the standard choice for steep-slope residential roofing.
• Three-tab shingle: a lighter asphalt shingle that costs less up front and wears faster under intense sun.
• Wood shake and cedar shake: natural shakes that breathe well but need more upkeep on older homes.
• Clay tile and concrete tile: heavy, long-lived coverings that usually need framing reinforcement before we install.
• Slate: the longest-lasting covering available and the heaviest, so we inspect the structure before quoting it.
• Standing-seam panel and corrugated panel: metal panel systems that shed debris and handle low pitch well.
• TPO, EPDM, and PVC membrane: single-ply options for flat roofs, porches, and additions.
• Built-up roof and modified bitumen: layered asphalt and bitumen systems for garages and light commercial roofing.

We install systems from lines like GAF Timberline, Owens Corning Duration, and CertainTeed Landmark, and we register the manufacturer warranty in your name when the job closes.

Other Parts We Replace While the Roof Is Open

Once the deck is bare, everything attached to the roofline is reachable. Doing this work now costs far less than a return trip later.

• Fascia and soffit: the wood and vented panels behind your gutter, which rot quietly once water backs up.
• Gutter and downspout: we reset or replace runs that sag, pull loose, or dump water against the foundation.
• Ventilation: soffit vent, attic fan, and attic insulation work together to move heat and moisture out of the house.
• Flashing details: chimney flashing, pipe flashing, parapet trim, and any boot flashing get replaced rather than reused.
• Specialty trim: snow guard, roof anchors, and the sealant and caulk lines that keep accessories weathertight.
• Low-slope transitions: we re-line or re-coat scupper and coping details where water ponds instead of draining.

When a Repair Beats a Full Replacement

We are licensed and insured, but that does not mean every call ends in a new roof. Sometimes the honest answer is a targeted repair, and we will say so in plain words.

A dried-out caulk joint, one cracked boot flashing, or a lifted ridge cap is a same-week fix. Granule loss across the field course, widespread cracking, or water that keeps seeping back after two repairs points toward end-of-life wear. When our roofers walk a roof and find soft decking under three separate leaks, replacement is usually the cheaper path over ten years.

What Roof Replacement Costs in San Jose

Pricing moves with square footage, roof pitch, how many layers come off, and the material you choose. Here is what pushes a bid up or down.

• Square count: roofing is priced by the square, which is one hundred square feet of finished roof surface.
• Tear-off layers: a second or third layer means more labor, more dumpster space, and more debris to haul.
• Pitch and access: steep or tall roofs need scaffold or a ladder-and-harness setup, which adds labor hours.
• Decking repairs: rotten plywood, delaminated OSB, or a cracked purlin gets replaced before the new covering goes down.
• Material grade: architectural shingles, tile, slate, and metal panel each sit in a different price band.
• Flashing and trim: new step flashing, counter-flashing, drip edge, and ridge cap are part of the system, not add-ons.

We put every line into a written roof estimate so you can compare bids apples to apples. Ask us what a repair would cost before you commit to replacement, and we will give you that number too.

Our Step-by-Step Replacement Process

1. Roof inspection and estimate: we walk the roof, check the attic and decking, and hand you a line-item estimate in writing.
2. Material and permit prep: we confirm your selection, order materials, and pull the permit so the work meets local building code.
3. Tear-off and deck repair: the crew strips the old covering, parks the dumpster, and replaces any rotted sheathing, fascia, or soffit.
4. Dry-in: we install ice-and-water shield at the eaves and valleys, then roll out synthetic underlayment over the field.
5. Installation: starter course along the eave, staggered courses up the field, ring-shank nails set by nail gun, then ridge cap and ridge vent.
6. Cleanup and walkthrough: magnets sweep the lawn for nails, the dumpster leaves, and we register your manufacturer warranty with you.

Tools and Materials You Will See on Site

• Pry bar and roofing shovel: used to strip old shingles, tar, and felt without tearing up sound decking.
• Nail gun and air compressor: they set fasteners and screws to the right depth so shingles are not overdriven.
• Roofing square and chalk line: they keep courses straight and let us lay a true starter strip along the eave.
• Ladder and safety harness: anchor points and harnesses are non-negotiable on every pitch we walk.
• Sealant, caulk, and construction adhesive: applied at flashing beads and penetrations, then checked before we leave.
• Coating and mastic: used on low-slope sections and patches where a membrane top coat outlasts a cold repair.
• Torch: used only on modified bitumen details where a heat-welded seam beats a cold-applied one.

Roof Shapes and Details We Work Around

Two houses on the same street can need completely different flashing plans. The shape of the roof decides where water collects and where wind lifts.

• Hip and gable rooflines: a hip slopes on every side while a gable ends in a triangle, and each one leaks in different places.
• Mansard and gambrel roofs: two-slope designs common on older houses, which need extra flashing at the break line.
• Verge and overhang details: the rake edge and how far the roof hangs past the wall both affect wind uplift.
• Awning and canopy covers: small attached roofs over doors and patios, where roof cement and coating keep old seams alive.
• Tile battens and counterbattens: horizontal strips that lift tile off the deck so air moves and water drains away.
• Vapor barrier and attic duct insulation: they stop household moisture from rising into the framing and condensing on cold nails.

Warranties, Insurance Claims, and Local Weather

A new roof is a long-term purchase, so we put the terms in writing before the first shingle comes off. You get the manufacturer warranty on materials plus our own workmanship coverage, spelled out in the contract.

Flashing is where weatherproofing is won or lost, which is why we do not reuse old metal. If a winter storm or falling limb caused the damage, we photograph it, meet your adjuster, and help document the insurance claim so the scope matches the real repair.

Local weather asks a lot of a roof. Dry summers bake the asphalt and erode the surface, winter rain finds every soft flashing detail, and low humidity lets algae and moss settle in on north-facing planes.

Questions Homeowners Ask Before Replacing a Roof

How long does a roof replacement take?

Most single-family homes take two to four days once materials land, weather permitting. Larger roofs, tile, or unexpected decking repair can stretch it to a week.

Can you overlay the old roof instead of tearing it off?

We can recover a roof in some cases, but we rarely recommend it. An overlay hides deck damage, adds weight, and shortens the life of the new covering.

Will the new shingles match my neighbor's roof?

We can get close, but an exact color match on an aged roof is not realistic. Sun exposure changes shingle color over the years, even within the same product line.

Do you help with insurance claims for storm damage?

Yes. We document the damage, provide a line-item scope, and coordinate with your adjuster so nothing important gets left off the claim.