Roof Slope Section

Roof pitch multiplier table.

Roof slope section.

We include on roof measurements roof measurements or estimates that can be made from ground level and several neat tricks using a folding ruler to measure roof angle or slope. Here we describe various methods for measuring all roof data. If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. Roof slope equivalents as rise.

Complete list of roofing types. This article shows how simple measurements can give the roof area. Roof slope or pitch rise run area and other features. When required for steep slope roofs section 1507 in the ibc and section r905 1 2 of the irc specify the use of an ice barrier that consists of either two layers of underlayment cemented together or a self adhering polymer modified bitumen sheet at eaves and valleys.

Degrees to pitch rise in run table. Roof covering materials provide weather protection and chapter 9 regulates the minimum required slope for each type of roof covering material since part of the performance of a roof covering material is based on the slope of the roof surface. In the us the slope of the roof is typically expressed as a ratio rise in run or rise run which by general agreement in the us roofing industry always uses 12 inches as the run and states how many inches the roof rises vertically for every 12 inches the roof goes across horizontally sloped roofs commonly have slopes like 6 in 12 6 12 or 8 12.