colorado walapini

Permies thread where a Colorado Springs builder seeks roof-slope/depth advice; responders warn Bolivian ~18°S walapini geometry is a poor match for 39°N and recommend Oehler-style northern earth-sheltered designs. OP (Colorado Springs, 40 acres) asks for roof slope and wall depth for year-round growing maximizing equinox/solstice light. Responder states Colorado Springs ~39°N; original walapini designed for ~18°S equatorial location—poor match; south wall must be much lower for winter sun on south bed. Recommends Mike Oehler underground greenhouse as proven northern design; cites NOAA solar calc Dec 21 ~26.46° and June 21 ~73.3° sun elevation. Another post points to Nebraska oranges greenhouse video as similar-but-not-true-walapini approach.

Evidence tier: forum. Forum anecdotes, not measured builds.

forum|candidate