- Square
- 100 square feet of roof area. Roofing materials are priced and ordered by the square.
- Pitch
- The steepness of a roof, written as rise over 12 inches of run, such as 6/12.
- Decking
- The wood sheathing the roofing is attached to.
- Underlayment
- A water-resistant layer installed over the decking and under the shingles or membrane.
- Flashing
- Metal pieces that seal joints and roof penetrations such as vents, chimneys and walls. Flashing is the #1 source of roof leaks.
- Drip edge
- Metal edging at the eaves and rakes that directs water into the gutters.
- Ridge
- The top horizontal line where two roof planes meet.
- Hip
- The sloped line where two roof planes meet on an outside corner.
- Valley
- The inside angle where two roof planes meet and water runs together.
- Eave
- The lower edge of the roof that overhangs the wall.
- Rake
- The sloped edge of a gable roof.
- Membrane
- A continuous sheet roofing layer used on low-slope and flat roofs.
- Supplement
- A request to the insurance company to cover items missed in the original claim estimate.
