Standard Hip Roof Angles

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Standard hip roof angles.

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. 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. 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. The combination of two numbers are used to display or show the roof pitch.

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. Outside top plate edge to ridge top edge common 10 11 3 4. The hip roof is the most commonly used roof style in north america after the gabled roof. Hip roof framing center join diagram with options for square roof 1.

With a square roof the ridge becomes a square center piece kingpost with side lengths equal to common rafter thickness. 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. A hip roof or a hipped roof is a style of roofing that slopes downwards from all sides to the walls and hence has no vertical sides. Roof battens lath hip end side roof battens.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. S5 s8 s9 s12 s21 s24 s29 32 jack rafters layout right side. S1 s4 s13 s16 s17 s20 s25 28 hip rafters layout.

Hip roof framing diagram main roof side hip roof truss layout hip end side hip roof framing plan truss layout jack rafters layout left side. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Hip backing angle 15 4. This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 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.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. To derive formulas for the critical angles we need to define some terms which i do in figure 2. The most commonly used roof pitches fall in a range between 4 12 and 9 12. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.

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.