Need to lower humidity levels
We have a 1,000 sq ft ranch home with a basement, built 1964, in Western NY. Since installing additional insulation in the attic last year and now installing new double pane glass windows throughout the house the humidity has been high, im guessing to a more air tight environment and less variance between attic and living area. Also after residing part of the house, I found that there is no vapor barrier felt paper over the sheathing on the exterior walls, cedar sided with fiber backer board.
We usually run a dehumidifier in the basement due to excessive humidity down there but had to bring it upstairs to help bring it down in the living area. In the living area without the dehumidifier running the levels will go up to 65% and there will be dripping condensation on the lower portion of the upper sash on the new windows. I understand that some fogging condensation may be normal, but this is actual droplet formation that will eventually ruin the windows. Also there has been some mild mold formation in the dark corners of the master bedroom.
My questions are...
1) Other than using the dehumidifier, which does bring it down to 50%, although running an awful lot, can an air to air heat exchanger (also known as heat pump??) help to reduce indoor humidity?
2)Also would installing faced insulation in the floor help to reduce humidity vapor comming into the living area from the basement?
3)Would putting vapor barrier over the exterior sheathing help to reduce vapor comming in through the wall, or does the facing on the insualtion in the walls prevent this?
The climate here is cold and snowy in the winter, may get down to 0 degrees F at times in Jan/Feb, we get alot of lake effect from Lake Ontario and Erie. Fall and srping are typically rainy and wet at times, summer can be hot and dry or humid, depends year to year.