Moisture issue - pre floor coating

[nreed]

I have a portion of my floor that has efflorescence. I did a sheet test and left it there for several days and it was bone dry. We had an extremely heavy rain yesterday and now there’s a spot of light moisture on of my sheets. Foundation work has been done on this wall from the exterior. I wanting to do a floor coating. How should i proceed?

 

[FJ4FUN]

Perform an anhydrous calcium chloride test (best to do this when experiencing rainy weather) and determine MVT levels then contact us (or any of the other vendors who contribute here) for specific prep and product recommendations.

Calcium Chloride test kit

 

[P0234]

What is your drainage situation around that area?