[john70t]

If yer in any doubt about mold, spray the crap out of every square inch with a 10% bleach solution from a garden sprayer.
(Mask and a cross-breeze of course.)
Be generous.
Button up and wait a week.

Then apply Zinsser or other shellac-based primer.
Thinned down or straight. Roll or spray. Cover everything.
Use a 3/4"roller on an extension and do half a wall with one bucket dip. 15 minutes tops.

There are also "encapsulating" products made from sea shells from lowes.
Dries hard as a rock.
I used this on the back of joists/plywood before the insulation and drywall.