Asphalt Shingles: Roofing material made of asphalt that is commonly used for residential roofs.

Blistering: Bubbles or swelling in the roofing material caused by trapped moisture.

Built-Up Roofing (BUR): Roofing system composed of multiple layers of roofing felt and asphalt.

Dormer: A structure that projects from a sloped roof, typically containing a window.

Eaves: The lower edge of a roof that overhangs the wall.

Fascia: Trim board located along the roofline.

Flashing: Metal strips used to waterproof roof transitions and prevent leaks.

Gable: Triangular portion of a wall between the edges of intersecting roof pitches.

Gutter: Channel attached to the edge of the roof to collect and divert rainwater.

Hip Roof: Roof with all sides sloping downwards to the walls.

Ice Dam: Ridge of ice that forms at the edge of a roof, preventing proper drainage.

Joist: Horizontal structural member that supports the roof decking.

Laminated Shingles: Asphalt shingles composed of multiple layers for added durability.

Membrane Roofing: Roofing system consisting of sheets or rolls of material for waterproofing.

Pitch: The angle of a roof slope expressed as a ratio of rise to run.

Rafter: Sloping beam that supports the roof covering.

Ridge: The highest point where two roof slopes meet.

Soffit: Underside of the eaves that extends from the fascia to the wall.

Tar Paper: Heavy-duty paper used as an underlayment for roofing materials.

Underlayment: Material installed under the roofing material to provide additional protection.

Valley: Internal angle where two roof slopes meet.

Vent Pipe: Pipe that extends through the roof to allow for ventilation.

Woven Valley: Roofing technique where shingles from both sides of a valley overlap.

Asphalt Roofing: Roofing material made from asphalt and fiberglass or organic materials.

Bird’s Mouth: Notch cut into a rafter to fit over the wall plate.

Counterflashing: Metal installed over roof-wall intersections to prevent water ingress.

Drip Edge: Metal flashing along the edge of a roof to direct water away from the fascia.

EPDM: Ethylene Propylene Diene Monomer, a type of rubber roofing material.

Flange: Projecting rim or edge used for attaching roofing components.

Hip Ridge: Ridge formed at the intersection of two sloping roof planes.

Lath: Thin strips of wood used to support roofing materials.

Mansard Roof: Roof with two slopes on all four sides, with the lower slope steeper than the upper.

Parapet: Low protective wall along the edge of a roof.

Rake: Sloped edge of a gable roof.

Saddle: Small roof section connecting two larger roof sections.

Tab: Exposed portion of a roofing material, such as a shingle.

Underlayment: Material installed under the primary roofing material for added protection.

Valley Flashing: Metal installed in valleys to direct water flow.

Weathering: Process of a roofing material deteriorating due to exposure to the elements.

Asphalt Roll Roofing: Roofing material made of asphalt-impregnated felt.

Barge Board: Decorative board covering the projecting edges of a gable roof.

Cricket: Small ridge structure designed to divert water from a roof area.

Dormer Window: Window set vertically in a small projection from a sloping roof.

Eaves Overhang: Extension of the roof beyond the walls of a structure.

Felt Underlayment: Asphalt-saturated felt used as an underlayment for roofing materials.

Gambrel Roof: Roof with two slopes on each side, the upper slope being shallower than the lower.

Ice and Water Shield: Self-adhering membrane used to prevent ice dam formation.

Lap: The portion of roofing material that overlaps another piece.

Pitch Pocket: Flashed penetration in a roof for accommodating pipes or other components.

Rafter Tails: Exposed ends of rafters beyond the exterior walls of a building.

Last Updated: 03/08/2024