Insulation and Drainage for Recently Poured Foundation
Brand new GBA member, excited to try out the service.
I purchased a home on Cape Cod and there were severe water issues in the basement because it was built on clay and lacked proper drainage. We decided to lift the house to solve the water problem and capture living space (bedroom, bathroom, game room, etc).
The foundation has been poured and the plan is to now waterproof with Tuff N DRI (instead of tar) and backfill with septic sand and a small amount of clay on top of the septic sand.
My first question is whether or not I should do a french drain around the perimeter. Because it’s sand, my contractor and the foundation guys think I’ll be okay without it.
My second question is the most cost effective way to insulate the slab. Foundation team said we should do plastic, then foam, then plastic and then pour the 4 inch slab.
Thanks for any thoughts and resources. I’m brand new to this and have been watching Matt Risinger and Home Renovision on Youtube.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part