Slab are not designed for comfort and R-value?
Slabs are terrible to walk on–at work we have concrete floors. My legs and feet hurt after a few hours.
Yet I can walk my dog for an hour on ground and my house is on a joist floor and its all good. So on my addition–a slab is better than a crawl space of 36″. I have seen where you can put treated sleepers in and fill between with sheet foam–but wouldn’t that make it stiff by eliminating flex? has their been any work done on measuring floor give when you walk on it? Is their a way to replicate a wood floor on the slab that can be rated?
My Idea was to do slab with sleepers that would have a gap between top of sheet foam and subfloor.