I spent half of the day on-site and among other things, helped to unload an entire 53-foot long trailer full of ICF blocks that will be used as forms for the basement walls. Insulated concrete forms (ICF) are lego-like blocks made of styrofoam-like insulating panels that are held together by internal webbing designed as cradles for rebar and anchor points for fasteners. Once stacked to the desired height, concrete is poured into the forms and the resulting wall assembly has an R-value of 25. Jeanine joined me on a visit to the site this evening and we wound up visiting with our neighbors who invited us over for snacks and drinks.