Hardwood floors in a straw bale house may not be the most common of floors, but they sure are beautiful. The reason they are not the most common is that most people want to couple the thermal mass values of concrete or earthen slab floors with the thermal insulation values of the bale wall assemblies. This makes sense, but is not always applicable. For example, some homes are built on raised floor foundations and as such, are better suited for lightweight floors like hardwood or engineered wood floors. Some owners simply prefer the look of wood over slab products, while others find that their physical and/or financial limitations require them to work with wood floors over slab materials. No matter what your reason for choosing hardwood or engineered wood floors, you will run into an issue that folks who build with slab floors won’t have: edge gaps.