How To Build A 2 12 Pitch Roof

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How to build a 2 12 pitch roof.

The pitch of the roof is a ratio. For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. A low pitched roof would be 2 12 and it means that over the space of 12 inches the roof only rises two inches. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.

This is a way of measuring the degree of steepness of the roof. The number of inches that the roof rises vertically for every foot of roof. If you re building rafters and aren t sure where to start when determining the length of your lumber you re in the right place our rafter stock size calculator shows you how long your rafters should be so you ll know what you need in terms of framing lumber dimensional lumber studs and more. You can use either 2 6 or 2 4 rafters for roofs with a 3 12 pitch or greater but it depends on the overall size of your shed.

Most roof s have a pitch in the 4 12 to 9 12 range. For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. Calculate the roof pitch. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. The pitch of a roof is the rise the vertical angle of the roof over the run the horizontal measurement. So use a tape measure to find the height of the roof above the top wall of the building. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options.