Normal Roof Pitch

If you want to build a shed garage or other similar type of building then 4 to 6 is a preferable pitch type.

Normal roof pitch.

4 12 to 20 12 pitches. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. A flat roof would have a 2 12 pitch while the average roof pitch would be between 4 12 and 9 12.

In the usa the range of standard pitches is anywhere between 4 12 and 9 12. Display of roof pitches 1 12 through 18 12. Clay or cement tiles can be used on a wide range of roof pitches. Pitch is a measure of the steepness of a roof.

So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Most roofs in america follow these dimensions where pitch range is kept between 3 to 7 1 2. An average person can easily and safely walk upon these roofs without need of additional equipment. However you can only use this pitch with built up roofing or specialized synthetic roofing.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. Thatch is one of the oldest roofing materials and needs a steep pitch to drain properly some types of stone roofs have a very restrictive roof pitch. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. Any pitch higher than 9 12 is considered a steep pitch.

Roof pitch varies depending on culture climate style and available materials. The most commonly used roof pitches fall in a range between 4 12 and 9 12. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. 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.

If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. With insufficient pitch a roof can leak rain and with a pitch too great its stones will fall loose. In the uk the typical house has a pitch between 40 50 although 45 should be avoided.