Pitch For Earthship Roof

Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off.

Pitch for earthship roof.

The earthship s roof perhaps one of the trickiest challenges we faced in this construction project was to build a roof that didn t leak. In the video above i explain the importance of roof pitch when it comes to snow. In the video i also explain why the chimney and vent pipes should be located close to the roof s ridge. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. 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. For that reason flat roofs are limited to these types of covering materials.

If you sketch that out on paper you ll see that a roof angle of 60 degrees requires a very tall north wall or an altered plan for the greenhouse. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. How roof pitch determines suitable roofing systems. The combination of two numbers are used to display or show the roof pitch.

The graphic below helps flesh this out. But here in wet southeastern ohio it is a major concern. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Since earthships were born out in the desert southwest i suspect the folks out there didn t give it much thought.