While most of the house will be reclaimed wood flooring, the cellar is a bed of concrete with an R-value closer to a screen door than foil faced Polyisocyanurate. The cellar is below the Passive House insulating barrier, which starts just above, on the ceiling.
Squibb history: The first motor driven mobile mixer entered the construction scene in 1916 – a small but consequential development of the concrete jungle. It was invented by Stephen Stepanian – and the modern mixer doesn’t appear to have changed much from his original vision. It replaced the horse-pulled mixer that worked with wooden paddles to turn the mix. It was slow work until machines able to haul tons of wet concrete were developed, especially in the building boom after WWII. Photo: Blueline Construction staff transport wheel barrow loads of the mix to the opening of the cellar.