We wave our moisture readers at every corner, and test those pesky plumbing systems.  

I was simply covering the issue of steam and moisture in the air.Now, as to source of heat - that can be radiator, electric baseboard or a vent register from a forced air system.

These are double pane with broken seals, moisture between the panes...ofgift

Those disgusting creatures are the German cockroaches which are common in dirty kitchens/bathrooms (anywhere indoors where moisture and a food source is available) and most common in apartments.

A test kit invented would be a piece of wood or cardboard left on the side of a structure to sit stagnant with moisture around, and frequent a visual inspection for dirt shelter tubes, termites eat dirt and poop out-spit out to create a sheltered tunnel in which they travel to eat "cellulose" protecting them from humans and sunlight. 

Had the inspection done and there is clearly work that needs to be done in the $5-$10K range, incl some work around rotten wood, leaky pipes/faucets, holes in doors/walls, small amt of mold in bathroom, sump pump drain issues, bathroom fans routing into attic causing moisture issues...etc.  

Without it you are inviting mold and moisture problems. 

The problem with laminate is it's very vulnerable to moisture and easily ruined by a careless tenant. 

Wood floors can do some strange things when there is a sudden change in moisture content.

There were several issues noted as relates to the roof including staining in the ceiling of one of the closets and moisture noted in the attic....That to me suggests current and past leakage...something that was never disclosed.