So I've been reading Joe Lstiburek's articles regarding rubble foundation wall insulation (Double Rubble Toil and Trouble, BSI-041: Rubble Foundations, etc). However, recently ran across an article where Joe indicated that adequate drying occurs to the outside where the foundation wall is "vapor open", or in other words, above grade by at least 14".
So, in my quest to find the right solution to my own rubble foundation wall basement, I stand slightly confused. I'm looking at insulating and finishing my basement. I have very little water entering the basement currently (limited to a small trickle about once a year). I do have at least 14" of the foundation wall exposed to the exterior...and in some locations, it's nearly 36".
My question is, to what extent should I guard against all the potential evils of encapsulating my basement stone foundation walls with 2lb closed cell insulation? In your opinion, is there adequate drying opportunity available to forgo a membrane, interior perimeter drainage, and capillary break at the sill plate? Thoughts? |