Roof Slope Area Conversion Tables

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Roof slope area conversion tables.

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. Roof pitch conversion charts are very useful for one thing they give you all the information that you need to provide to the professionals. 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. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

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. To accurately calculate the area of your roof you must first determine its slope or pitch. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. If you can give them the exact chart and measurement that you like the look of they can work to those specifications.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Low slope roofs are from 0 to 3 12 in pitch. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.

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. For example if you measure 4 inches the pitch of your roof is 4 12. Slope conversion tables 1 4 1 2 3 4 1 1 1 4 1 1 2 1 3 4 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 2 25 3 4 5 6 7 8 9 10. The charts are there to provide people with an idea of what the actual slope will.

The combination of two numbers are used to display or show the roof pitch. Divide the rise by the run the run is 12. A 12 in 12 pitch is a. Some sources consider low slope to include 3 12 pitch roofs.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.