How To Build A 2 12 Pitch Roof

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.

How to build a 2 12 pitch roof.

For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. Calculate the roof pitch. A low pitched roof would be 2 12 and it means that over the space of 12 inches the roof only rises two inches. 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.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. So use a tape measure to find the height of the roof above the top wall of the building. 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.

The pitch of a roof is the rise the vertical angle of the roof over the run the horizontal measurement. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Pitch ratios range from 2 12 to 12 12.

The number of inches that the roof rises vertically for every foot of roof. 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. This is a way of measuring the degree of steepness of the roof. The pitch of the roof is a ratio.