Originally Posted by joecaption
Might want to look at some of the post already posted in the past few days on this exact same subject.
Also go back and add your location to your profile. Really important with a question about insulation.
I added my location (Detroit, MI). I also took your advice and read around, but this has lead to more questions (see below).
Originally Posted by Windows on Wash
Might as well seal it up prior to replacing the fibrous stuff.
Plenty of threads on how to seal up ribbon boards.
I didn't know what the ribbon board was, so I had to look it up. Am I correct in understanding that is the board behind my insulation that the joists attach to?
Originally Posted by hammerlane
If you can afford it, spray foam is the way to go. The batt insulation will not stop the air infiltration. After I had my basement rim joist cavities all done with the spary foam, not only warmer but found less insects in the basement.
We've had a horrible time with Boxelder bugs getting in this year, so that makes sprayfoam quite intriguing. I'll have to research the cost to see if that would be feasible, but I'm thinking it will be more than I want to spend. I'm assuming sealing up the ribbon board as "Windows on Wash" suggested would have that same type of effect?
After reading around here a bit this is what I'm thinking. Rigid foam board against exterior wall, seal those joints and cracks with a spray foam, then put my batt insulation on top of that. Found this image illustrating it from another post:
Does that sound correct? I do have a few follow-up questions.
Sealing the ribbon boards
Caulk vs some sort of spray foam, like Great Stuff? I assume foam is the better way to go, just more expensive?
Facing or no facing?
There appear to be two schools of thought on this. I was under the impression you want to have the facing on facing the interior of the home as a vapor barrier. However, I was reading a post here
that suggests the facing will not stop air movement. I could be wrong there. To leave the facing on or take it off?