Roof Slope Area Conversion Tables

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.

Roof slope area conversion tables.

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. A 12 in 12 pitch is a. 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.

This will give you the rise over run or pitch. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks.

If you can give them the exact chart and measurement that you like the look of they can work to those specifications. Low slope roofs are from 0 to 3 12 in pitch. Roof pitch conversion charts are very useful for one thing they give you all the information that you need to provide to the professionals. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. To accurately calculate the area of your roof you must first determine its slope or pitch. Notes to the table above. Some sources consider low slope to include 3 12 pitch roofs.

Divide the rise by the run the run is 12. For example if you measure 4 inches the pitch of your roof is 4 12. The combination of two numbers are used to display or show the roof 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.

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.