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.

Slope tan degrees. A 12 in 12 pitch is a steep 45 degree angle roof. So if the pitch of your roof is 7 12 place one stair gauge on the vertical part of the framing square the tongue at the 7 inches 18 cm mark and place one stair gauge on the horizontal part of the framing square the body at the 12 inches 30 cm mark. Then multiply the slope by 12 to get the rise.

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 roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. See the image below for more explanation on rise run and pitch. Below we detail common pros and cons of each roof pitch variation.

These factors are important to consider before moving forward with the building of your roof. There are two main types of roof pitch to choose from when deciding what roof will be best for your home. 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.

Low pitch roof pros. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. The minimum roof slope for metal roofs is dependent upon the roof profile.

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. Lower slopes don t handle wind driven rain as well. Low pitch and high pitch roofs. Steeper slopes increase the sail effect that makes them susceptible to wind.

Minimum pitch for metal roof. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. 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.