Nearly a week later and the greenhouse foundation is finished. The 4 x 4 sill plate is now secured to the cement foundation. On the south wall, where the windows will be, 2 x 6s are in place.
Scott filled the space between the 4 x 4s with gravel. This, in combination with the tar paper, will wick away any moisture that might accumulate.
We left two inches of concrete on each side of the sill plate. This will be the final plaster stop at the bottom of each wall.
We tried to arrange for our straw to come from local sources. However, for this project, the timing of Wayne County’s harvest is too late to guarantee its arrival in time for our workshop. As a result, we contacted Don Brown, our friend in Hinkley, Utah. Don located 90 bales of dry, bright, tightly baled straw and drove it to Torrey.
It is safely stored under multiple tarps, away from any wet weather that will likely occur between now and October.
Workshop participants will arrive October 1, less than two months away. Between now and then, much must be accomplished. The first step, the foundation, was completed when Tyler Torgeson, owner of Double T Construction – https://www.facebook.com/pages/Double-T-ConstructionTyler-Torgerson/227032987374880 – poured the foundation.
The 22-inch north, east, and west sides will be strawbale walls. This will accommodate an 18-inch bale plus two inches of plaster on the inside and outside of the structure. The foundation on the south side, which is five inches wide, will be fitted with fixed and awning windows made of 8 mm, twin walled, polycarbonate panels.
To blend the foundation with the surrounding soil, Davis Concrete Pigment – #10134 (salmon) was added. Tyler recommended the color as the best match he has seen in the area. So far, so good.
In order to keep everything isolated from the concrete, we install tarpaper on the foundation. This will ensure that no moisture wicks from the concrete into the frame and straw. The treated wood 4 X 4 sill plate will anchor the walls to the floor and, again, keep the straw away from any moisture in the concrete. As one might guess, moisture and straw do not make a happy marriage.