2 12 Roof Pitch Shed Roof

Roof pitch designations are comprised of two numbers indicating a ratio.

2 12 roof pitch shed roof.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Therefore if your roof rises 4 inches over the course of 12 inches of horizontal run then your roof pitch is 4 12. This means that for every 12 inches of horizontal distance across the shed the roof will rise 4 inches. Simply put it s a shallow roof.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 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. To make the bottom cut i laid out a level cut for a 4 in 12 pitch. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. If you have a roof with a pitch that is less than 3 12 you should not use 2x4s. Remember that pitch is calculated as the height or rise of a roof pitch over 12 inches of horizontal run. In roofing it is expressed in inches of vertical rise over inches of horizontal run.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. 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. Asphalt shingles typically have a minimum slope rating of 4 in 12. This slope works well for sheds that are fairly narrow like 4 to 6 feet but for sheds that are 8 or wider the shed roof becomes unsightly high.

As stated in the. Most roof s have a pitch in the 4 12 to 9 12 range. There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch the most obvious of which is the roof s ability to shed or withstand. Pitch is the term used to describe the angle slope or slant of your roof.

If you do opt to use 2 4 shed rafters for your roof construction you will always use a 2 6 ridge beam even though the rafters will be 2 4. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 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.

Or the colon can replace the slash as in 2 12 or 7 12. Constructing a new shed roof at the desired pitch is as easy as knowing how to use a speed square. A 4 12 pitch being 4 inches of vertical rise over one foot or 12 inches of horizontal run.