My old house is in Atlanta and built in 1925. The house is a Mediterranean style and built with terra cotta blocks, covered in stucco on the outside.
The crawl space slopes about 30 degrees from front to back. We do not have water problems. The dirt floor has some flimsy plastic that needs to be enhanced. There are three 1-foot square vents to the outside. The only entrance is through an insulated, exterior door. Total square footage of the basement is about 1800 square feet.
All of the plumbing and HVAC ducts run through this area. The HVAC system is installed in an area of the crawlspace that has a concrete floor. The HVAC ducts are insulated.
There is no insulation on the walls or the subfloor. The hardwood floor above is "leaky," to say the least.
- Would you insulate the walls or the subfloor or both?
- If insulating the subfloor, can I use spray foam?
- Should I close the vents?
- Should I add an HVAC supply into the crawlspace area?
- How should I handle the risk of Radon? (We have not tested. There is no easy way to vent to the attic.)