Some sources consider low slope to include 3 12 pitch roofs.
Safe roof pitches in pa.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
If you want to build a shed garage or other similar type of building then 4 to 6 is a preferable pitch type.
It is an essential element to ensure water drains properly off of your roof.
An average person can easily and safely walk upon these roofs without need of additional equipment.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
The roof pitch would be described as a 6 12 pitch.
With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 200 for slate roofs.
Ways to work on a steeply pitched roof.
Measuring a roof pitch.
The tools required will be a contractor s level at least 24 inches long and a tape measure.
Pitch is a measure of the steepness of a roof.
The pitch of your roof also helps determine the type of materials that can be used on your roofing system.
Any pitch higher than 9 12 is considered a steep pitch.
Most roofs in america follow these dimensions where pitch range is kept between 3 to 7 1 2.
The primary reason roof pitch exists in the first place is to redirect water.
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 not you will need to make your measurement from on top of the roof itself or at the edge of the roof with a ladder.
Notes to the table above.
But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.
Low slope roof 4 12 slope or less 29 cfr 1926 501 b 10.
Ideally you will have safe access to your roof from inside the building.
The possibility of slipping and falling makes working on any roof dangerous but it s especially so if the roof rises more than 4 feet for every 12 feet of.
A roof pitch of 6 12 26 5 or less is considered easily walkable and no extra precautions are required.
Contractors and employers who perform construction.
Pitches between 8 12 and 10 12 33 40 are also considered walkable but it is not advisable and if you have to walk on these roofs extreme caution should be taken.
Know the pitch of the roof and follow the appropriate standard.
A flat roof would have a 2 12 pitch while the average roof pitch would be between 4 12 and 9 12.
A roof of pitch 7 12 30 is manageable but caution should be taken.
The pitch of the roof is determined by the vertical rise in inches for every horizontal twelve inch length.
