Residential Roof Terminology

The highest fire resistance rating for roofing as per astm e 108 or ulc s107.

Residential roof terminology.

Pitch this is the slope of the roof. Used for alignment purposes. The surface usually plywood or oriented strand board osb to which roofing materials are applied. The same roof has a 4 12 or 1 3 pitch.

The terms pitch and slope are simply two different ways of expressing the same measurement. The higher the number the steeper the roof. A small structure projecting from a sloped roof usually with a window. An asphalt based roof cement formulated to adhere overlapping plies or asphalt roll roofing.

It is the number of inches a roof rises vertically for every 12 inches of travel horizontally. Ice dams occur when melted snow refreezes near the overhang of a roof blocking the path for water run off and building up a heavy wall of ice. Occurs where overlapping materials are seamed sealed or. A hip roof is a roof in which four separate roof planes all come together at the top.

A line made on the roof by snapping a taut string or cord dusted with chalk. Roofing terms you should know deck sheathing. An l shaped strip usually metal installed along roof. That part of a roofing waterproofing or flashing component that overlaps or covers any portion of the same or.

What is an ice dam. A roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. An area of a roof with a valley on one side and a rake on the other and both come together at a point.