Understanding your roof s pitch and slope low slope.
Slope pitch of roof.
Take a measurement of 12 inches using a level.
Roof pitch is the degree of building s roof slope.
The rafter length is 3 4 the span about 48.
Position your level against the roof until the bubble of the vial sits between two lines.
The ridge height is 2 9ths to 1 3 the span an angle of 24 to 34.
Take the measurement of the vertical.
Before taking any measurements you must first confirm that it s safe to walk on your roof.
Check the surface of the.
It determines how many inches the roof should rise for every 12 inches expanding on the horizontal side.
A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.
The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16.
The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.
While the cost of the materials and labor to reroof a steep slope roof is more expensive the longevity is.
Lower slopes don t handle wind driven rain as well.
The rafters equal the span.
Some people prefer high pitches and some other choose low roof pitches each has their own advantages and disadvantages.
A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.
The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.
Steeper slopes increase the sail effect that makes them susceptible to wind.