It doings this upward only and the moisture dries out with the tile grout lines. The wetness levels build in a property without AC running and the drywall and wood fixtures absorb these moisture levels. When this occurs and the humidity levels struck 60% or higher, mold germinates. The mold stays with wood substrates. This is all surface mold.
When you get surface mold like the above scenario, you neet to hire a remediation company that will clean every inch and not just area clean. Remember, mold is mainly tiny. To get rid of and remove the mold consists of cleaning the mold you can not see so every inch of the home needs to be sprayed and sponged.
This includes walls, doors, walls, fans, cabinets (inside and out), doors, door jambs, floors, and fixtures. Once more, every inch needs to be cleaned as well as run air scrubbers to clean the air.
Dead mold is simply as allergenic as live mold according to the Environmental Protection Agency (EPA) of the United State of America. Be sure you have pre and post mold test so you know what levels you begin with which you accomplished the clearance goals once project is complete. This is the only format to assure any work.