Remove the source of moisture asap. Get as many dehumidifiers as possible. Here in the flood homes they had lots of huge commercial ones in the various rooms and they were on constantly. Fema requested that we use a specific product to clean the mold and prevent growth it is available at Lowes. Contran 20 or something like that is the name. Vinegar and hydrogen peroxide are OK but not allowed for our flood houses it does not prevent growing and doesn't kill everything. The other thing that everyone was using is Odorban full strength. It kills pretty much every thing. We went through so many gallons of it. I was ordering it online because it was sold out everywhere here. I would go with it rather than the vinegar.

My standard order

https://www.amazon.com/OdoBan-Ready-Bottle-Concentrate-Eucalyptus/dp/B000ZOQ9HY

If you have any fans, they do a nice job of drying wet carpets, so it ought to help with the walls. Even turning on the fan of your furnace full time so it does not cycle off should help too.

depends on how cool it is where you are. Dehumidifiers freeze up, when it gets to cold for them. If they freeze up, you will need to turn the heat on for sure.

Always wear a face mask when dealing with an area that you will be brushing mildew or other molds from. They may not cause immediate problems as they may need time to grow and multiply.

Alisande, I don't know what you should do for the wood, but have a suggestion of something for you to look into if you later decide you want to paint it.

There is a product called M-1 Advanced Mildewcide. It comes in a small bottle, 1.5 ounces, and you add it to your paint, interior or exterior. It can be stirred into water based, oil based or other solvent based paints. We had some problem spots on old plaster and so far it has kept the mold/mildew from returning for 7 years. It probably came from Lowes or Home Depot

I am so pleased with this product that if I were in your shoes I would look to see if the company had a product expressly for killing mold/mildew on raw wood.

Good luck.

Thanks, everyone! Following your advice, I put an electric radiator in the room. It's hot in there now, but still obviously humid. I'll shop for a dehumidifier tomorrow, and also pick up the OdoBan, which HomeDepot has at a good price. I'll look into M-1's products as well. I have no plans to paint the wood in the interior of the house, but we also have a big barn and a shed, so you never know what will be needed. Thanks again!

Post this on the Home Repair forum. It's a fast moving forum and some Pro help.

Please do as Maifleur01 mentioned above when working around mold and mildew. Their spores can create pulmonary problems if inhaled.

I have no better suggestions than what you got but I sympathize because I know you live in PA in an old house like me. I don't have mold or mildew but all my doors are original to the 180 year old house and won't close. They have swelled up so much from the constant moisture. And today added to the problem...87 degrees with 78 % humidity. When will this stupid summer end?

Not to worry, Gmatx. My young mother died from cleaning a rug with carbon tetrachloride, and I try to be extra careful what I breathe.

I don't know, Lily, but this weather is just a mess. I have shallow sinkholes all over my yard, and I hope it doesn't get to the point where it impacts the many pets we have buried near the house and in the barnyard. It was a wretched gardening season, and our apple crop is nonexistent. I see we're having yet another "chance of showers" week, with sun not mentioned until Friday--and then only "partly." I think anyone traveling here to view the fall foliage is in for a disappointment.