Click on colorful terms to see a picture. Some terms, such as various methods, will not have pictures.
Pallets: Wooden platforms used for storing and shipping bundles of shingles.
Pitch: The degree of roof incline expressed as the ratio of the rise, in feet, to the span, in feet.
Ply: The number of layers of roofing (e.g. one-ply, two-ply, etc.).
Quick-Setting Cement: An asphalt-based cement used to adhere tabs of strip shingles to the course below. Also used to adhere roll roofing laps applied by the concealed nail method.
Racking: Roofing application method in which shingle courses are applied vertically up the roof rather than across and up. Not a recommended procedure.
Rafter: The supporting framing member immediately beneath the deck, sloping from the ridge to the wall plate.
Rake: The inclined edge of a sloped roof over a wall from the eave to the ridge.
Random-Tab Shingles: Shingles on which tabs vary in size and exposure.
Release Film or Tape: A plastic or paper strip that is applied to the back of self-sealing shingles. This strip prevents the shingles from sticking together in the bundles and needs to be removed for application.
Ridge: The uppermost, horizontal external angle formed by the intersection of two sloping roof planes.
Ridge Shingles: Shingles used to cover the horizontal external angle formed by the intersection of two sloping roof planes.
Ridge Vent: A vent directly beneath the ridge shingles, in which the ridge shingles are slightly raised in order to allow air to escape from the uppermost portion of the roof.
Rigid Vent: Hard plastic ridge vent material.
Rise: The vertical distance from the eaves line to the ridge.
Roll Roofing: Asphalt roofing products manufactured in roll form.
Roof Louvers: Rooftop rectangular shaped roof vents. Also called box vents, mushroom vents, airhawks, soldier vents.
Roof Plane: A roofing area defined by having four separate edges. One side of a gable, hip, or mansard roof.
Roofing Cement: A compound used to seal flashings, seal down shingles and for other small waterproofing jobs. Where cement is required for sealing down shingles, use a dab about the size of a quarter unless otherwise specified.
Roofing Tape: An asphalt-saturated tape used with asphalt cements for flashing and patching asphalt roofing.
Run: The horizontal distance from the eaves to a point directly under the ridge. One half the span.