What are asphalt shingles?
Asphalt shingles (often called composition shingles) are the most common residential roofing material in the U.S. They’re installed in overlapping courses and typically reinforced with fiberglass.
Types (3‑tab vs architectural)
3‑tab shingles are flatter and usually lower-cost. Architectural (laminated) shingles are thicker, have dimensional profiles, and often last longer.
Typical lifespan
In the Bay Area, lifespan depends on ventilation, installation quality, roof pitch, and sun exposure. Architectural shingles commonly last longer than 3‑tab.
Common failure modes
Granule loss, brittle cracking, lifted tabs from wind, improper flashing, poor ventilation, and nail pops can create leaks.
Maintenance checklist
Keep gutters clean, remove debris, check flashing at chimneys/valleys, and inspect after storms.
FAQ
Quick answers to the most common questions.