R-value is the performance rating for a material's resistance to heat flow. An energy-efficient Rumford fireplace is the focal point of the home's great room. The vast chimney and western wall are made of shale and limestone from the site. Cherry and oak used for the flooring were also harvested on site. It's like a living house.
Bales fill the spaces between posts.
There are only a few tricks of the trade, according to Kurtz. The straw must be kept perfectly dry. Bales cannot be placed in direct contact with the foundation. Kurtz has used leftover roof shingles to form a secure moisture barrier. The bale walls are covered with chicken wire or hardware cloth and finished with other materials.