2 Pitch Roof
Most roof s have a pitch in the 4 12 to 9 12 range.
2 pitch roof. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. 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. 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 combination of two numbers are used to display or show the roof pitch.
To let the jacks sit plumb on top of the sleepers we angled the level cuts to the 3 1 2 in 12 pitch of the shed roof setting the circular saw to a 16 degree bevel the degree equivalent of a 3 1 2 in 12 pitch. To make the bottom cut i laid out a level cut for a 4 in 12 pitch. For many home owners the roof is a hugely important feature of the home and is the key section of the home which is seen from the exterior. 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.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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. 3 understanding the roof pitch chart process.
4 finding the best roof slope conversion chart.