Forced air heat is by far the best to have in a rainy locale like the Pacific Northwest, as it helps prevent mold and moisture problems.

I think $400-500 installed would cover it.Windows with moisture between the panes could be about $150 each.Hope that helps a little.

The upper unit is on a year lease that is up at the end of June, the lower unit is month to month and has been there for several years now.Currently, I rent an apartment, and moving into one of the units will still be a net positive because I'm losing less rental income from the loss of that unit than what I pay for my place now.I feel like the most gentle approach would be to approach the lower unit tenant about my intentions and ask if he is interested in moving out, and if he isn't then giving the upper unit plenty of advance notice that their lease would not be renewed come the end of June.The more immediate approach would be to give the bottom tenant (longer term, month to month) 60 days notice that his lease was going to be up and move in there as soon as he is out.Any advice or suggestions?

NOW BE GENTLE AND FOLLOW THE LAW.

Generally a moisture barrier is laid on top of the slab and the laminate boards interlock together on top of the barrier.

It's just a matter of how much.Dehumidifier will definitely help out and suck alot of the moisture out of the air.chris

I've seen leaky pipes, moisture coming through the foundation walls, moisture coming up through the foundation floor, and improperly vented rooms.

I have read mixed reviews from northerners about teh plank not sticking to the concrete in the basement due to moisture in the slab.

Given an average of a few inches of rain hitting the ground even in a pretty big rainstorm, it is unlikely that the moisture in the basement is from the rain water that hit within the couple of feet next to your foundation.

If not, perhaps steam/moisture from the shower is causing a short-Check all the other connections on the circuit while you're at it-Is there a leak behind the wall coming from the bathroom and getting to the GFCI wiring?