My current basement has styrofoam "bead board" glued to the concrete wall and framed with 2x3 in which drywall is hung. I would like to add a r12 fiberglass batten insulation to the framing and cover. should i rip out the 2X3 and repalce with a 2X4 framing to accomadate r12 fiberglass batten? or just use the 2X3?
very simple solution here, if you do what i did in my basement.
leave a 1" gap between your styrofoam board and 2x3 studs.
and r12 riberglass can be installed. that's it.
advantages are many, as wood won't be touching the styrofoam should it ever get wet with condensation, my roames is passed behind the studs,
only cliped in every 6-8feet, so no drilling necessary, and the advantage of r-12 installation.
I also think it is very cheep to install fiberglass r-12, and anyone that says upfront coast is higher than overall savings must not know anything about our canadian winters where it is -30 often...
also, if your walls are already built, it should be easier to move them 1" off the styrofoam, and use them as is, then replacing them and paying for new 2x4's.