Homeowner Resource

Roofing Glossary

Plain-language definitions for common roofing terms you may see in an inspection report, estimate, or insurance scope.

Decking

The structural wood surface attached to roof framing beneath the underlayment and finished roofing material.

Metal flashing installed along roof edges to direct water away from fascia and into the gutter system.

Metal or waterproof material that seals transitions around chimneys, walls, valleys, vents, and other roof penetrations.

The shedding of protective mineral granules from asphalt shingles. Concentrated loss can indicate age, wear, or hail impact.

A self-adhering waterproof underlayment used in valleys, at eaves, and around vulnerable roof details.

A flashing component that seals the opening where a plumbing vent passes through the roof.

A ventilation opening installed along the roof peak that allows warm, humid attic air to escape.

A roofing measurement equal to 100 square feet of roof surface.

The finished underside of a roof overhang, often vented to help move air through the attic.

A water-resistant layer installed between roof decking and shingles as secondary protection from moisture.

The internal angle where two roof slopes meet and channel a concentrated flow of rainwater.

Coverage for installation-related issues, separate from a manufacturer warranty covering roofing materials.