I apologize if this has been asked before. I've been researching how to finish the basement of my house and have become somewhat confused about how to frame and insulate in order to achieve best moisture control (actual energy efficiency is NOT the main goal).
This is my situation:
- the house is from the 1960's, concrete block foundation with concrete floors in the basement
- I removed the old 'finish' which was wood strapping nailed to the concrete blocks with thin wood panelling nailed to the strapping
- there was no insulation
- I'd like to frame the basement with 2 x 4 studs, use batt insulation and drywall to finish
My confusion lies in the fact that I'm not entirely sure how (or rather exactly where) to place the framing and how to install the batt insulation while leaving a gap (say 1") between the framing and the concrete block walls so air can circulate and allow any petential moisture to evaporate. My impression is that if I put the framing 1" or so away from the concrete block walls and then put the batt insulation between the studs, the batt insluation will eliminate my 1" gap and stop air from circulating (it would also come in contact with the concrete blocks).
First of all, is the approach I described the correct one in my situation? If so, how do I make sure I've got a gap between the concrete block wall and my framing/insulation? If the approach described above is incorrect, why and what are my alternatives.
It should be noted that I have not detected any mold anywhere during the demolition and there was wood in contact with the walls and floor. I do however have a bit of efflourescence here and there which leads me to believe that the concrete block are (or were at some point) transferring at least some moisture from the soil and I'm assuming I won't be able to stop this completely.
Thanks a lot.