I was recommended to use rockwool insulation (Roxul) for my basement wall insulation (exterior walls).
Now I know my wall framing must be 1" from the concrete wall to let air circulate, but with that air gap I'm wondering what's the best way to put in the rockwool insulation without having it fall back and touch the concrete.
I'm thinking of tacking a felt or paper membrane on the concrete-facing side of my frame (I'd be building it on the floor then raising it). That way the membrane would hold back the insulation. Don't worry I haven't forgotten about the vapor barrier between the insulation/frame and drywall.
However I'm wondering what's the proper most common way people hold that type of insulation inside the frame without it falling back.
I searched on google a lot but all I can find are guides using rigid XPS directly attached to the concrete walls. I'm not going with XPS as the rockwool would provide R14 by itself which is enough.
important edit I forgot to mention that while I'm doing my basement, it HAD 2x2 framing with 1" of EPS boards glued to the concrete wall. I removed one board to see the state of things and it was pretty darn clean (No water stains). Should I just leave the EPS boards glued to the walls (Replace the one I removed) and put up my 2x4 frame right up against it instead? The old 2x2 wood still looks brand new (Aside from being dry as a bone for age). So it looks like the EPS did a good job for the past 15+ odd years, considering there was no vapor barrier behind the old drywall and no tucktape between the EPS boards (Which I'd place if I keep the EPS).
Now I know my wall framing must be 1" from the concrete wall to let air circulate, but with that air gap I'm wondering what's the best way to put in the rockwool insulation without having it fall back and touch the concrete.
I'm thinking of tacking a felt or paper membrane on the concrete-facing side of my frame (I'd be building it on the floor then raising it). That way the membrane would hold back the insulation. Don't worry I haven't forgotten about the vapor barrier between the insulation/frame and drywall.
However I'm wondering what's the proper most common way people hold that type of insulation inside the frame without it falling back.
I searched on google a lot but all I can find are guides using rigid XPS directly attached to the concrete walls. I'm not going with XPS as the rockwool would provide R14 by itself which is enough.
important edit I forgot to mention that while I'm doing my basement, it HAD 2x2 framing with 1" of EPS boards glued to the concrete wall. I removed one board to see the state of things and it was pretty darn clean (No water stains). Should I just leave the EPS boards glued to the walls (Replace the one I removed) and put up my 2x4 frame right up against it instead? The old 2x2 wood still looks brand new (Aside from being dry as a bone for age). So it looks like the EPS did a good job for the past 15+ odd years, considering there was no vapor barrier behind the old drywall and no tucktape between the EPS boards (Which I'd place if I keep the EPS).