Slope Pitch Of Roof

The ridge height is 2 9ths to 1 3 the span an angle of 24 to 34.

Slope pitch of roof.

While the cost of the materials and labor to reroof a steep slope roof is more expensive the longevity is. Check the surface of the. Take the measurement of the vertical. Commonly used roof pitches were given names such as greek.

Position your level against the roof until the bubble of the vial sits between two lines. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. Before taking any measurements you must first confirm that it s safe to walk on your roof.

Take a measurement of 12 inches using a level. It determines how many inches the roof should rise for every 12 inches expanding on the horizontal side. Lower slopes don t handle wind driven rain as well. The rafters equal the span.

If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. 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 rafter length is 3 4 the span about 48. These types of roofs anything under 3 12 have increasingly shown jacksonville homeowners issues.

Steeper slopes increase the sail effect that makes them susceptible to wind. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. Some people prefer high pitches and some other choose low roof pitches each has their own advantages and disadvantages.