Basement is unfinished, 100 year old house. Basement floor is dirt and various crumbling sections of old concrete. Walls are rubble and cement and above grade brick.
I'm planning on leveling the floor with tamped gravel, putting down foam board, radiant tubing and then pouring concrete and then probably tile. Walls will be foamed with closed cell foam.
Foam company said to do the floor first, but I think you'd want to foam first and pour the concrete to the wall edge and the foam will provide expansion for the floor.
But I really don't know and maybe it doesn't matter.
Ok, considering the comments below, here's my order of operations: This would create a fully thermal-sealed basement:
- Lay down gravel in the basement to level it. Tamp that down, mechanically.
- Lay down vapor barrier and then Foam board on the gravel basement floor, probably 3 inch.
- FOAM THE WALLS - connects all the way down to foam board.
- Wall mount the manifolds for radiant
- Lay down the radiant tube (wire mesh attached or template board attached)
- Pour concrete floor
- Install the boiler(s)