I've seen conflicting info on this. Some sources say that you shouldn't insulate your foundation wall because moisture can get trapped between the insulation and the wall. Others say that the insulation is a key part of the encapsulation.
I'm assuming that the answer to which is right is: "it depends." So my question is, what does it depend on?
I'm assuming that some of the factors that matter are:
- Is the sill plate sealed?
- Will there be a dehumidifier?
- Will the HVAC system be serving the crawl space at all?
What else matters?