How Long Does a Roof Last in New Jersey?

New Jersey's climate — with its freeze-thaw winters, hot humid summers and coastal storms — puts real stress on a roof. Knowing how long your roof should last helps you plan ahead.

Asphalt Shingle Roofs

Architectural asphalt shingles, like GAF Timberline HDZ, typically last 20 to 30 years in New Jersey when properly installed and maintained. Three-tab shingles last somewhat less. Installation quality and ventilation make a big difference.

Flat Roofs

Modified bitumen and membrane flat roofs generally last 15 to 25 years, depending on the system and how well the seams, flashing and drainage were detailed.

What Shortens a Roof's Life

• Poor attic ventilation, which cooks shingles from below.
• Skipped maintenance that lets small problems become big ones.
• Storm damage left unrepaired.
• Improper installation, especially at flashing and valleys.

Getting the Most From Your Roof

Regular inspections and maintenance, prompt repairs, and proper ventilation are the keys to reaching — and exceeding — your roof's expected lifespan.