Pouring Concrete In Crawl Space

https://cesarskcr099.tumblr.com/post/185964333327/5-vines-about-pumping-concrete-into-crawl-space

Where as in modern-day structure, the concrete piece might have under floor heating pipes, and these slabs are cast above expanded polystyrene, a layer of insulation. A non-insulated slab is used is outbuildings,