Roof Slope Factors For Roofs

A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.

Roof slope factors for roofs.

Multiple folded plate sawtooth or barrel vault roofs shall have a c s 1 0 with no reduction in snow load because of slope i e p s p f. Then you ll be able to measure slope from an unfinished attic space under the roof. This way it also requires very less maintenance as compare to flat roofs. For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.

Roof pitch refers to the slope which the rafter creates. This way the pitch of the roof and the slope of the roof can be measured. Roof slope expressed as rise in run degrees and percentage. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.

Roof slope multiplying factors theory and solution of factor. 9 12 20 12 steep slope. Ice dams and icicles along eaves. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.

Roof slope factor for multiple folded plate sawtooth and barrel vault roofs. Last updated july 10 2020. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. This roof slope factor table also consists of hip and valley factors to measure the possible hips and valleys.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. The overall length of the roof or a common rafter from the base to the ridge is. You could calculate the slope factor for every single roof pitch but as a public service many roofing. Having said this you can get all these advantages only if you build a proper pitched roof keeping in mind all the important factors that need to be addressed like pitch of your roof slope you wanted on your roof etc.

Measurement of your house roof pitch is one of the. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. For instance if the measurement was 3 your roof slope factor would be 3 12 and you. The list below contains the common roof slopes and the terms which classify them.

The length of the rafters can also be determined while determining the slope. The roof slope factor is written as x 12 where x is the vertical distance you measured from roof to level.