Useful Terms You Should Know
When talking to a contractor about your roof, he may use terms that you have no idea
what they are, these terms are certain parts of your roof construction.
- Deck: The surface installed over the supporting framing members to which the roofing is
applied.
- Drip edge: A non-corrosive, non-staining material used along the eaves and rakes to
allow water run-off to drip clear of underlying construction.
- Eave: The horizontal, lower edge of a sloped roof.
- Felt: Fibrous material saturated with asphalt and used as an underlayment or sheathing
paper.
- Flashing: Pieces of metal or roll roofing used to prevent seepage of water into a
building around any intersection or projection in a roof such as vent pipes, chimneys,
adjoining walls, dormers and valleys. Galvanized metal flashing should be minimum 26-
gauge.
- Gable: The upper portion of a sidewall that comes to a triangular point at the ridge of a
sloping roof.
- Gable roof: A type of roof containing sloping planes of the same pitch on each side of
the ridge. Contains a gable at each end.
- Hip: The inclined external angle formed by the intersection of two sloping roof planes.
Runs from the ridge to the eaves.
- Rake Edge: The inclined edge of a sloped roof over a wall from the eave to the ridge.
- Ridge: The uppermost, horizontal external angle formed by the intersection of two
sloping roof planes.
- Ridge Vent: Devices that eject stale air and circulates fresh air (i.e., ridge, roof, gable,
undereave, foundation or rafter vents and vented soffit panels.)
- Undereave Vent: Devices that eject stale air and circulates fresh air (i.e., ridge, roof,
gable, undereave, foundation or rafter vents and vented soffit panels.)
- Valley: The internal angle formed by the intersection of two sloping roof planes to
provide water runoff.
- Waterproofing Underlayment: A layer of asphalt saturated (sometimes referred to as tar
paper) which is laid down on a bare deck before shingles are installed to provide
additional protection for the deck.
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