Asphalt used to impregnate an organic felt base material.

An asphalt-impregnated felt used as an underlayment between the deck and the roofing material.

A thermal-sealing tab cement built into the shingle to firmly cement the shingles together automatically after they have been applied properly and exposed to warm sun temperatures. In warm seasons, the seal will be complete in a matter of days. In colder seasons, sealing time depends on the temperature and amount of direct sunlight hitting the shingles. Hand sealing with cement should be done to ensure sealing in winter.

Shingles containing factory-applied strips or spots of self-sealing adhesive.

Factory-applied adhesive that bonds shingle courses together when exposed to the heat of the sun after application.

That portion of roll roofing overlapped by the succeeding course to obtain double coverage.

Slight differences in shingle color that may occur as a result of normal manufacturing operations.

Exterior-grade boards used as a roof deck material.

A roof containing only one sloping plane. Has no hips, ridges, valleys or gables.

Asphalt roofing that provides one layer of roofing material over the deck.

The degree of roof incline expressed as the ratio of the rise, in inches, to the run, in feet.

Roll roofing that is covered with ground talc or mica instead of granules (coated).

A vent pipe that penetrates the roof.

The horizontal distance from eaves to eaves.

A self-adhering, waterproofing shingle underlayment designed to protect against water infiltration due to ice dams or wind-driven rain.

Shingles on which tabs are all the same size and exposure.

Method of installing asphalt shingles on roof slopes greater than 21 inches per foot.

Flashing application method used where a vertical surface meets a sloping roof plane.

A single-layer shingle commonly known as a three-tab shingle because it has three tabs.