Pitch For Earthship Roof

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Pitch for earthship roof.

The graphic below helps flesh this out. 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. I also share a little about why we did not build an earthship as we had planned because of the climate here. In the video i also explain why the chimney and vent pipes should be located close to the roof s ridge.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. How roof pitch determines suitable roofing systems. 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. 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.

A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. But here in wet southeastern ohio it is a major concern. For that reason flat roofs are limited to these types of covering materials.

In the video above i explain the importance of roof pitch when it comes to snow. The combination of two numbers are used to display or show the roof 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. Since earthships were born out in the desert southwest i suspect the folks out there didn t give it much thought.