Roof Warranty Information: What NJ Homeowners Should Know

Two Different Warranties

Every new roof comes with two very different kinds of protection, and homeowners often discover the difference only when something goes wrong. The manufacturer warranty covers the materials themselves, while the workmanship warranty covers how those materials were installed. A roof is only fully protected when both are in place.

What the Manufacturer Warranty Covers

Manufacturer warranties on asphalt shingles are typically described as "lifetime," but the fine print matters. Full replacement value usually applies for the first 10 to 15 years, after which coverage is prorated against the remaining expected life of the shingles. Coverage also generally applies to defects in the product, not to storm damage, foot traffic, or improper installation.

What the Workmanship Warranty Covers

Workmanship warranties come from the contractor and cover installation errors: nailing patterns, flashing details, valley treatment, and penetrations around vents and skylights. Industry practice ranges from one year to a decade or more. Because the majority of roof leaks originate at details rather than in the field of the shingle, this is the warranty most likely to matter.

Certified installers can offer enhanced coverage that standard contractors cannot. As a GAF Master Elite contractor, Double D Construction can register eligible roofs for extended manufacturer-backed coverage that includes workmanship, which means a single warranty stands behind both the product and the installation.

What Can Void Your Coverage

Several common situations can void roof warranty coverage: installing a second layer of shingles over an existing roof, inadequate attic ventilation, unpermitted structural changes, pressure washing, and repairs performed by another contractor. Keeping attic ventilation within manufacturer specifications is one of the most frequently overlooked requirements in New Jersey homes.

Protecting Your Coverage

Protect your coverage with documentation. Keep the signed contract, the shingle product and color, the installation date, the warranty registration confirmation, and records of every inspection and repair. Most manufacturers require registration within a set window after installation, so confirm it was completed rather than assuming.

If you are unsure what is covered on your existing roof, we can review your paperwork and inspect the roof itself to tell you where you stand.