Mold resistant insulation / Discussions

...insulation. Insulating the basement without a frame wall interests me but I’m not sure if it would be possible to achieve R24 without one. Could 2” of EPS with another 4” of rock wool be installed without a frame wall? Even if not required I imagine it may be advisable to protect the insulation with some kind of coveri...

...mold caught in joints etc.)? Local HCAV didn't offer a good suggestion - just air exchanger and that's not enough... need to remove source of issues. Also welcome the best insulation (in Ontario) for cubbies 16", 2-3" thick. Has to be super clean, no off gassing, mold resistent.  Also, suggestions for best air exchange...