We are starting to look into dealing with a musty basement problem. I realize there a lot of tips on this problem in this website. I have a more specific question about the door to the basement. We have a half door, so there is a lot of air flow to the upper part of the house, and we are concerned that the musty smells are traveling upstairs. It's bad enough that it smells downstairs; we don't want the rest of the house smelling! Will installing a full size well-fitted door help solve this problem? Or are odors likely traveling by another route? Will it make things worse to seal off the basement with a door? Note that there are large windows that we could open in the stairwell to the basement, if we had a closed door. Appreciate your advice.
Get a dehumidifier,and if you have any vents or heating system or air conditioniong that uses vents or air ducts from the basement then the smell will come up from this. Also this smell will find away up,putting a well fitted full door now you have to see if you have a fresh air return to your heater that is up to date or able to be having a door shut from the upstairs.Sometimes if it is older (im not sure how old)the air return needs to have the upstairs door open to help create the fresh air it needs or could cause carbon monoxide. A dehumidifer will really help alot.