Basement / crawl space fix
I’m doing a renovation on a house that is half crawl space and half basement. The crawl space is part of the original house (circa 1950) and involves a concrete footing with a pressure treated knee wall built on top of it to support the floor joists and above wall (and the rest of the single story house). It is skinned with PT plywood and backfilled to a depth of about 4 feet with the local silty dirt. It was insulated with pink fiberglass batts and had an interior vapor barrier. We’ve pulled off the VB, removed the insulation, and beside being full of rodent droppings, the actual wood seems in decent health. This is a very dry area of the country (Okanagan region of Canada, getting about 12″ of rain annually).
The other half of the house was built in 1996 and is on a full concrete basement. The interior walls were 2×4 framed and contained pink batt insulation, a VB, and drywall. This has all been pulled out, save for the framing. There is evidence of water staining along the bottom of the walls, more pronounced in some areas than others. This is odd given the dryness of the climate but it’s there.
Both spaces flow into one another, with no separation, and given that there are not vents, and it was insulated, I would consider it a sealed crawlspace.
So, I’m trying to decide what the best way forward is. The catch is that this house is in a “red zone” and the geotechnical engineers will not let us touch the exterior walls at all. We’re left to live with the PT plywood and wooden knee wall. Does a person simply spray foam the whole thing or is there a better way forward?
Thanks for your help. I could send photos it that would help.
Penticton, BC. Canada
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