Hi all, I don't know if this is efflorescence or mold on my wall. As per the inspection report from a few years ago it says: "Efflorescence seen on walls indicates the presence of past and/or periodic moisture. Recommend cleaning and resealing the block walls prior to re-painting" Questions: 1) is it mold, efflorescence or both? 2) What are the next steps I need to do to remove and clean this from the wall and what kind of resealing block do I need to put on these walls? (low voc and water based-kill z Mold and Mildew?) 3) What kind of flooring can I replace with the current one-it is currently vinly and where the pump of the basement is. I compared the pictures from the inspection report and the pictures of the wall now and it doesn't look like it has grown or changed(mold grows?) Pictures attached, Thanks for your tips/help.

I'm remodeling 2 bathrooms in my house because of long term moisture damage. I'm not doing these projects myself, but at least want to understand the process and learn along the way. After researching here as well as other sites, I'm trying to figure out the type of drywall to put in my bathrooms. Seems there are just as many opinions as when asking what is the best oil at a car forum. We will not have tile in the shower so water will not be hitting any walls directly...just a standard fiberglass (or whatever it is) shower stall. I can say moisture is the major concern. I'll be upgrading my fans but I have 3 teenage girls who in the mornings take hot shower..after hot shower...after hot shower. From what I read so far I'm leaning toward the green backed drywall in the entire room including the ceiling..but I welcome opinions if I'm way off. Thanks in advance