Residential Roof Terminology

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.

Residential roof terminology.

A hip roof is a roof in which four separate roof planes all come together at the top. The terms pitch and slope are simply two different ways of expressing the same measurement. Used for alignment purposes. Pitch this is the slope of the roof.

An l shaped strip usually metal installed along roof. An asphalt based roof cement formulated to adhere overlapping plies or asphalt roll roofing. 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. That part of a roofing waterproofing or flashing component that overlaps or covers any portion of the same or.

The higher the number the steeper the roof. A line made on the roof by snapping a taut string or cord dusted with chalk. An area of a roof with a valley on one side and a rake on the other and both come together at a point. The surface usually plywood or oriented strand board osb to which roofing materials are applied.

What is an ice dam. It is the number of inches a roof rises vertically for every 12 inches of travel horizontally. The same roof has a 4 12 or 1 3 pitch. Occurs where overlapping materials are seamed sealed or.

The highest fire resistance rating for roofing as per astm e 108 or ulc s107. Roofing terms you should know deck sheathing. A small structure projecting from a sloped roof usually with a window.