Roof Slope Area Conversion Tables

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

Roof slope area conversion tables. For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.

For example if you measure 4 inches the pitch of your roof is 4 12. Some sources consider low slope to include 3 12 pitch roofs. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. This will give you the rise over run or pitch.

To accurately calculate the area of your roof you must first determine its slope or pitch. Divide the rise by the run the run is 12. Low slope roofs are from 0 to 3 12 in pitch. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials.

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. A 12 in 12 pitch is a. 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 can give them the exact chart and measurement that you like the look of they can work to those specifications.

Notes to the table above. Roof pitch conversion charts are very useful for one thing they give you all the information that you need to provide to the professionals. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. The combination of two numbers are used to display or show the roof pitch.

The charts are there to provide people with an idea of what the actual slope will.