I have a 1920 home over a crawl space with pier and beam foundation. it has a double block footer all the way around. the wood is all rotted and crumbling so I have been told converting to a slab is the right way to go. basically fill in with gravel and sand. then pour a 4 inch slab to be the new subfloor for the house. my question is regarding the existing plumbing. can I leave it in place? or does it have to be removed before the fill is put in. then rebuilt before the slab?
thank!
