A bituminous waterproof membrane goes over the decking.
Earthwood, the author's home. An earth roof is hands-down the most beautiful roof you can build.
Photo by Rob Roy
Author Rob Roy (right) and an assistant snap a chalk line to guide trim cuts as they install roof decking over radial rafters.
Jim Milstein built "Asterisk" near Pagosa Springs, Colorado. It's an earth-sheltered home composed of three intersecting barrel vaults.
Jaki Roy weeds the roof before the wildflowers come into bloom.
An earth-sheltered home requires less energy to heat than a conventional home, and no energy to cool.
Matthew T. Stallbaumer