The places I have used foam are things like crawl spaces or the underside of porches to insulate and vapor seal to prevent pipes from freezing. 

so I have a house under contract, this is for my primary residence in rock hill sc that I intend to house hack, and in my due diligence period the inspector found evidence of powder post beetles and extremely high moisture under the house and I'm wondering what this could end up costing me if i get it treated and have a vapor barrier put into the house and put up gutters to get this house to qualify for the loan and then it proves the damage is a lot deeper than inspected like into the sub floor i included some pictures to show the damage the inspector found  still have a week and a half till my due diligence is up (2/26/19)the really wet part is the beam at the front of the house around where the front door is 

I would seriously consider putting down a vapor barrier, 3/4" plywood, a vapor barrier and LVP.

All her balls were kept in the air constantly and she never missed a beat. 

Fibermesh only is fine, just make sure no matter what they do, whether it's rebar or fibermesh, that they put a poly vapor barrier down and pour on top of that.

This acts as a good vapor barrier at the same time. 

Some of it very germane some of it passe' or not really legal anymore in certain venues.Its like many things RE no different you need to put in your apprenticeship .. the idea that you can go from zero to making 20 to 50k a month flipping houses well that's just not reality but.. the idea you can go from zero to 20k a month in residual income selling Herbal life well thanks not reality either for most of us.For me RE was a process..

Water vapor hitting a poorly insulated cold area then turning into liquid water maybe. 

Because the substance is cooked, its vapors can also cause accumulation in the ducts and air handler.

.- Freon leaks on units less then 5 years old- galvanized pipes in attics with pinhole leaks- cracked slabs (and all that goes with that repair from cracked tiles to cracked walls)- AC condensing unit stolen in vacant house- underground plumbing leaks- and the best one was a voltage surge in a house that burned out the transformer on the AC unit, and burned out the stove digital display, and ruined two outdoor mercury vapor lights.