The definitions are arranged in alphabetical order:

A | B | C | D | E | F | G | H | I | L | M | N | O | P | Q | R | S | T | U | V | W

Laminated shingles:: Strip shingles containing more than one layer of tabs to create extra thickness. Also called three-dimensional shingles or architectural shingles.
Lap:: To cover the surface of one shingles or roll with another.
Lap cement:: An asphalt-based cement used to adhere overlapping plies of roll roofing.
Low slope application:: Method of installing asphalt shingles on roof slopes between two and four inches per foot.

Mansard roof:: A type of roof containing two sloping planes of different pitch on each of four sides. The lower plane has a much steeper pitch than the upper, often approaching vertical. Contains no gables.
Masonry primer:: An asphalt-based primer used to prepare masonry surfaces for bonding with other asphalt products.
Mastic:: See asphalt plastic roofing cement.
Mineral stabilizers:: Finely ground limestone, slate, traprock or other inert materials added to asphalt coatings for durability and increased resistance to fire and weathering.
Mineral-surfaced roofing:: Asphalt shingles and roll roofing that are covered with granules.

Nesting:: A method of reroofing with new asphalt shingles over old shingles in which the top edge of the new shingle is butted against the bottom edge of the existing shingle tab.
No-cutout shingles:: Shingles consisting of a single, solid tab with no cutouts.
Non-veneer panel:: Any wood based panel that does not contain veneer and carries an APA span rating, such as wafer board or oriented strand board.
Normal slope application:: Method of installing asphalt shingles on roof slopes between 4 inches and 21 inches per foot.

Open valley:: Method of valley construction in which shingles on both sides of the valley are trimmed along a chalk line snapped on each side of the valley. Shingles do not extend across the valley. Valley flashing is exposed.
Organic felt:: An asphalt roofing base material manufactured from cellulose fibers.
Overhang:: That portion of the roof structure that extends beyond the exterior walls of a building.

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: i.e. one-ply, two-ply.

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.
Random-tab shingles:: Shingles on which tabs vary in size and exposure.
Release 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 need not 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.
Rise:: The vertical distance from the eaves line to the ridge.
Roll roofing:: Asphalt roofing products manufactured in roll form.
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.