Glossary of Roofing Terms

Roofing construction is a complex process filled with unique industry terms, concepts, and jargon. At Bone Dry, we believe in the importance of educating our customers to the best of our ability to build a finished product that perfectly suits their needs.

Roofing nails and staples that are driven into the deck at an angle in order to increase structural integrity

Metal flashing located at the juncture of a sloped roof and a vertical wall, chimney, or steeper-sloped roof

Fine, granular material applied to the back of shingles to keep them from sticking together during storage or transport

Bubbles that form in roofing materials, generally as a result of poor ventilation or trapped moisture

Wrinkling of roofing underlayment or movement of the wood deck that stops asphalt shingles from lying flat

Shingle installation method wherein the top roof plane’s shingles are laid to completely cover the bottom plane’s shingles, and are cut to match the bottom’s valley line leaving no flashing exposed

Piece of metal applied to the masonry wall designed to shed water off of the wall and down onto the roof surface

Horizontal decorative molding that sticks out just below the roof line

A curl or “cup” shape that forms in shingles that are improperly installed over an existing roof structure, are over-exposed, or due to a defect

Also known as “sheathing,” the deck is the plywood or oriented strand board that forms a surface onto which other building materials can be applied

Raised roof structure protruding from a sloped roof, often used for windows on two-story homes

L-shaped metal strip installed along the edge of the roof that keeps water off the deck, eaves, and siding

Horizontal lower edge of a sloped roof, generally the first three feet across a roof

The part of each shingle that is exposed to weather and the elements

Flat board or band under the roof edge that forms the outer surface of the cornice

Staples and nails used in roof construction or replacement used to firmly attach roofing tiles and other materials to the deck

The Federal Housing Authority, a government organization that sets construction standards for roofers working in the United States

Metal material that forms a weather-resistant barrier over the joints of a roof, preventing water from getting in

Triangular portion of a wall between the edges of intersecting roof pitches

Crushed rock used to coat the top surface on shingles

Small timbers or metal beams ranged parallel from wall to wall, arranged in a parallel structure and used to support a floor or ceiling

Continuous metal flashing bent at a horizontal wall to resemble an “L”

Shingles made from two separate pieces that are laminated together, also known as dimensional or architectural shingles

Slatted devices installed in a gable or soffit to ventilate the space below the roof deck in order to maintain favorable temperature and moisture content

Installation of a second layer of shingles along the courses of the original roof in order to avoid shingle cupping

National Roofing Contractors Association, a national organization of roofing contractors

Shingle installation method wherein shingles on both sides of the valley are trimmed along a chalk line snapped on each side of the valley, with valley flashing exposed

Oriented Strand Board, a deck material made from wood chips and lamination glue

When fasteners are driven in with too much force, leading to breakage

Roofing application method wherein shingle courses are applied vertically up the roof

Top section of the roof formed when two sloping roof surfaces intersect

In roofing, the number of inches of vertical length in comparison to the horizontal length, used with the run to find slope

Rectangular-shaped roof vents

In roofing, the number of inches in horizontal length in comparison to the vertical length, used with rise to find the slope

Non-exposed area on rolled roofing with no granules designed for nail placement and sealant

See “Deck”

Steepness of a roof, measured by vertical rise in inches for every 12 inches of horizontal run and expressed as rise (inches)/run (inches)

Underside of an architectural structure that connects the roof overhang to the side of the building

Bottom part of a shingle separated by shingle cut-outs

Removal of existing roof materials down to the deck so that new materials can be placed

When top-level shingles show evidence of uneven surface beneath them, such as shingles installed above buckled shingles showing signs of buckling

When fasteners are driven in with too little force, leading to potential damage due to unsecured tiles

Asphalt-based material installed under the main roofing material that serves as a secondary layer of protection

Angle formed when two adjoining sloped roof planes meet, creating a V-shaped depression

Material designed to restrict passage of water vapor through a roof system or wall

Ready to get on the road to a new roof? Whether you’re a homeowner looking to upgrade your roof or looking for help with your next commercial project, contact us today for a free assessment! No matter your needs, we’ve got you covered…with experience you can trust.