Roof Replacement in San Jose, CA

Roof replacement begins with a complete tear-off: we strip all old shingles, underlayment, and flashing down to the roof deck and sheathing, then inspect the OSB or plywood substrate for rot, decay, or structural sag. Damaged decking gets replaced before installation continues. We then lay down synthetic underlayment and ice-and-water shield in valleys and along the eaves—critical barriers against water intrusion in San Jose's winter rain storms. Drip edge and flashing are installed next, followed by starter courses and field courses of architectural shingles, staggered to code. Ridge vents are set, ridge cap shingles are nailed, and soffit and fascia are checked or replaced. The entire job produces debris that we haul away in a dumpster.

What determines cost? Square footage of your roof, material choice (GAF Timberline, Owens Corning Duration, CertainTeed Landmark are common), pitch complexity, and local building code requirements. A typical San Jose home—mid-century ranch or contemporary suburban—runs 1,500–3,500 square feet. Labor, permits, and manufacturer warranty registration add to the line-item estimate. The process usually takes 2–4 days, depending on weather and roof complexity.

You need replacement when shingles show widespread granule loss, curling, or splits; when multiple leaks appear; when the roof sags or settles; or when it's simply reached 20–25 years old. San Jose's dry summers and intense sun accelerate UV degradation, shortening the life of budget shingles. A professional inspection reveals whether repair or replacement makes sense—we'll tell you honestly which path fits your roof's condition.