How To Calculate Hip Roof Pitch

It is often compared to slope but is not exactly the same.

How to calculate hip roof pitch.

Roof pitch is used to describe the slope or angle of the roof. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters. How to calculate the pitch of a roof. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.

One of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. The top ridge will be shorter for a hip roof but the 4 hips will add to the amount of ridge capping needed and because of the angles the amount of waste will be higher. On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections. How to use the hip roof framing calculator.

While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof. Select the following information by using the drop downs to enter values in feet and inches. Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.

All formulae are below the calculator. Modern residential hip roof construction uses common pitch ratios in general. Homes and other buildings have roofs with slopes ranging from no slope or flat to very steep slopes. The difference is in the amount of ridge capping you need and the amount you will waste.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Hip roof area calculator. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise common and hip rafters length and roof area based on width height of roof base and the roof pitch identical for all sides.

To get results you need to provide roof base dimensions length and width and roof pitch we assume it is identical for all sides. 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. A hip roof s square footage is equal to that of a gable roof with the same dimensions. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.