Standard Hip Roof Angle

Use separate hip roofs on homes with different wings.

Standard hip roof angle. One expression of a hip roof pitch based on this formula would be 4 12 meaning a 4 inch vertical rise for every 12 horizontal inches. Roof pitch and corresponding angles. The most common type of a hip roof. The angle at which the roof plane rises will account for a consistent height in inches above the 12 inch horizontal line and is described as the nominator of the pitch calculation ratio.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Using these angle definitions i will derive formulas for the sheathing θ s and hip pitch angle θ h given the common pitch angle which i call the roof pitch θ r and plan angle θ p. Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs. Types of hip roofs.

Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. If we consider the commercial applications then low sloop type roofs are preferred with pitch ranging from 2 12 to 4 12. The line where the two roofs meet is called a valley. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

To derive formulas for the critical angles we need to define some terms which i do in figure 2. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Hip roofs are more expensive to build than a gable roof.

The sides come together at the top to form a simple ridge. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. The most commonly used roof pitches fall in a range between 4 12 and 9 12.

Hip backing angle 15 4 for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Common hip roof pitch. So where two roof sections intersect to form a 90 angle a regular hip or valley and each roof section has for example a 6 in 12 slope the hip or valley rafter at that intersection will have a slope of 6 in 16 97. It has a polygon on two sides and a triangle on two sides.

Hip roofs can offer extra living space when a dormer crow s nest is added to a hip roof.