How do you insulate a basement slab to keep the benefits of thermal mass in a passive solar home?
...ine, and you can accomplish the same thing a lot easier and cheaper by just doing a slab on grade with a perimeter skirt of insulation. Laying a footing and stem wall to get below the frost line is a building technique that dates back to a time before the advent of insulation, where dirt was the insulator. Now insulati...