Mold does not come from the concrete, it comes from mold spores that are normally in the air. Dampness faciliitate the growth of mold which comes in contact with concrete or any other material allowing mold to grow.
cement board
Somewhere dark and damp, like a basement.
You are supposed to fur it out first. - That means a thin wood frame, usually 1x4 on the concrete FIRST. - It is not customary to apply drywall directly to a concrete basement wall.
Some disadvantages of plywood is if stored outdoors will warp and when damp with splintering. Also will mold in moist areas such as in a basement or under a tarp outside.
Mold needs moisture, heat, and food. All three conditions are necessary for it to grow. Mold is most likely to find a place to grow in a bathroom, basement or kitchen, but in this situation we are in a kitchen, and outdoors. Mold spores can grow and spread in wet or damp areas that have had flooding. and the light will either dry out the mold and eventually kill it.
it just has to be damp
What chemcals I can use to Kill potential mold behid the damp walls?”
Wooden patio chairs will mold in damp climates. The best way to help prevent this is to have an exterior finish on the wood such as a mold inhibitor.
You can remove mold on limestone basement walls by using mold remover. Bathroom cleaners and bleach also work well for this use.
Mold usually thrive in damp environments.
Mold needs moisture, heat, and food. All three conditions are necessary for it to grow. Mold is most likely to find a place to grow in a bathroom, basement or kitchen, but in this situation we are in a kitchen, and outdoors. Mold spores can grow and spread in wet or damp areas that have had flooding. and the light will either dry out the mold and eventually kill it.
That's definitely a good idea. If there is a sink and tub in there,I would even use a concrete or fibre board to back them also.