Roof Pitch Calculator
Roof pitch is a measure of the slope (slant) of
your roof. Roof pitch is calculated from the ratio of its horizontal span or
"run" to the vertical rise of the roof.
It is one of many important elements of your
roof, and the pitch of the roof is one of the most visible aspects of the roof.
It is a measure of the steepness of a roof or its slope.
Generally, the slope range of the roof pitches
falls between 4/12 and 9/12.
Pitches less than 4/12 have a slight angle
and are considered as low slope roofs.
Pitches less than 2/12 are defined flat roofs, even if they are at a very
small angle.
ROOF PITCH CALCULATION IN
MKS
ROOF PITCH CALCULATION IN FPS
ROOF
PITCH CALCULATION
Roof pitch = Rise (S) / (Run (N)/12)
Slope = (Rise (S) / (Run (N)) x 100
Angle
= Tan-1 (Rise (S) / (Run (N))
TYPES
OF ROOF PITCH
Low
Roof Pitch/Slope
This type of roof has a minimum pitch of 3:12, meaning a
roof rises 3 feet for every 12 feet of its base horizontal length (no more than
5:12). Roof: This type of roof is considered "walkable", and the roof
is easy to install.
Medium
Roof Pitch/Slope
This type of roof falls within the 6:12 - 9:12 roof
slope range. Roof: These roofs with intermediate pitch / average slope roofs
are considered "unwalkable" because they represent more complexity
and are therefore more expensive to install. Roof installation requires special
equipment such as roof jacks and planks.
High/Steep
Roof Pitch/Slope
Roofs of this type have a
slope of no more than 9 inches for every foot of horizontal roof. Roof: A high
slope roof is, perhaps, the most difficult and dangerous roof surface to work
on. Expect to pay more for this type of roof per square meter of installation.
Any roof and especially steep roofs requires the use of special safety and fall
prevention equipment.
Note: This calculation tool was developed with great care. However, we cannot be held responsible for its liability.
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