Hip Roof Pitch Factors

Charts are helpful because the factors for hips and valleys are listed which is useful for cutting rafters on the hip or valley.

Hip roof pitch factors.

The hip and valley factor is a number that is multiplied by the actual run horizontal distance of a common rafter to determine the length of a hip or valley rafter. Modern residential hip roof construction uses common pitch ratios in general. The roof pitch affects all the other areas in the estimate. 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.

Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. You just have to go online and there you can search this. The length of the rafters can also be determined while determining the slope. This article will help you calculate the roof pitch factors.

For example a shed has a 3 12 pitch roof with a outside wall dimension of 10 feet. This way the pitch of the roof and the slope of the roof can be measured. Repeat the run not the length of a common rafter for precision the thickness of the ridge board and any eave. Valley hip factor.

This roof slope factor table also consists of hip and valley factors to measure the possible hips and valleys. The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance. For regular hips and valleys where the roof sections have the same slope and meet to form a 90 degree angle. Roofs with hips and valleys have special factors.

Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. The higher the slope the steeper it is. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Length of the rafter.

A hip or a valley is where two roof slopes intersect forming a peak or a depression. Valley hip factor. Then you ll be able to measure slope from an unfinished attic space under the roof. It is very important to determine the roof pitch factors for designing the roof.

To obtain an accurate roof pitch measurement properly measure the rise and run.