I am looking for advice on preparing an unfinished basement room for the installation of an Endless Pool (www.endlesspools.com). Specifically, I need advice on insulation recommendations and moisture barrier (if any). House is located in Northern Virginia, USA.
I’ve read that the old practice of insulating a basement room is to put up fiberglass batt insulation with a vapor barrier. This method can create mold issues as the vapor barrier can trap moisture between the foundation wall and the moisture barrier.
The newer and preferred method (“Insulate and Weatherize” Bruce Harley Taunton Press) is to put up rigid polystyrene insulation directly against the basement wall. Build a 2x4 wall against the polystyrene. Unfaced fiberglass batt insulation can then be placed in the stud bays if desired.
Is the polystyrene method applicable for a pool room? What about using spray foam insulation? Are there additional considerations for the ceiling since the space above is ‘living’ space (the sun room)?
Below is the description of the room and all applicable details I could think of. The attached picture is of the future pool room. The large metal rectangle in the middle of the room is the walls of the pool. (Please ignore the various materials in the foreground.)
Any assistance is greatly appreciated. Thanks in advance.
Future pool room rough description:
- Unfinished basement area
- Room is at/above grade level
- Three walls are exterior
- Walls are poured concrete
- Space above the pool room is the sun room
Pool room finish plans:
- Floor: tile
- Walls: tile 2/3 up wall backed by cement board, upper 1/3 will be paperless drywall
- Ceiling: paperless drywall
- 8’x14’ above ground lap pool
- When pool cover is in place manufacturer states there is 0 moisture loss
- Rough in for ventilation fan in place
- Room dehumidifier with ventilation fan will handle moisture loss when pool is in use