flood zones....too old....and i want to say underground basement moisture and mold issues. but kinda on the fence w/that one.

I also agree with @Jay Hinrichs mold is usually created by a tenant, but also sometimes by an owner being neglectful, but whatever it is it is one of those issues for my renovation biz, even though I now know much more on mold (got great info from a mold removal guy here on BP too) and even though most mold is NOT the toxic strain, can be cleaned up relatively easily and IF the moisture source is eliminated, will not return.

Additionally, you will be creating more condensation in the attic than you want there which will lead to moisture damage and possibly (probably) mould.I would definitely plan to move the furnace into a conditioned space.

I would do whatever is necessary to get rid of your moisture problem.

I've installed laminates primarily for several years but am starting to lean towards vinyl plank flooring because I think it will hold up better to moisture and because it's easier to transport.

Well she left all the windows closed so the added moisture from the rain with no air flow caused mold/mildew to cover her stuff for the same reasons attics have soffits. 

It makes the two hours informative and fun.All of the documents and information booklets ("Mold, Moisture and Your Home", and "Protect Your Family From Lead In The Home", "Fire Safety", etc.) are given to the new tenant in a nice looking folder, along with our contact information and contact information for the utility companies.

Kyle:We make extensive use of closed cell foam as well - when renovating old balloon-framed houses it is the best/easiest way to air seal the walls and attic space.Applying spray foam directly to the underside of the roof deck turns the entire attic into a conditioned space, which means you need to close-in (if open) and insulate the soffits as well to have continuous insulation coverage up the walls and over the roof.However, you very well may still need a drainage/ventilation plane on the outside of the roof deck to ensure the deck material (board, plywood, OSPF) can dry out after absorbing moisture from rain/snow or condensation (by applying closed cell foam to the underside of the deck, you are changing the dew point in the roof deck construction).  

There are acoustic dampening subfloor material that will seal the moisture and dampen noise. 

Also thinking of buying moisture meter to check reading.