How To Make A Roof Pitch Stay Below 30 Feet

Fix stair gauges on the framing square to mark the pitch.

How to make a roof pitch stay below 30 feet.

Minimum pitch for metal roof. Slope tan degrees. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. The minimum roof slope for metal roofs is dependent upon the roof profile.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. A 12 in 12 pitch is a steep 45 degree angle roof. First find the slope by finding the tangent of the degrees eg. Since a low pitch roof.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Low pitch roof pros. 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 get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

Steeper slopes increase the sail effect that makes them susceptible to wind. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. See the image below for more explanation on rise run and pitch. Below we detail common pros and cons of each roof pitch variation.

Use a sturdy extension ladder that extends at least 3 feet above the eaves to climb onto the roof and secure the bottom to the foundation and the top to the eaves or fascia so it doesn t move. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. Lower slopes don t handle wind driven rain as well. These factors are important to consider before moving forward with the building of your roof.

Low pitch and high pitch roofs. If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12. There are two main types of roof pitch to choose from when deciding what roof will be best for your home.