I've been dealing with high humidity levels in my basement this summer—it's currently sitting at 81°F with 80% relative humidity. Outside, the temperature is 85°F with 60% humidity, so it seems like my basement is holding on to moisture somehow. I have four windows near the ceiling (ground-level on the outside) which I think might be part of the problem. I've tried a few strategies to improve the situation, but I need your thoughts and any tips you might have.
Here's what I've done so far:
1. I open all the windows and turn on two strong fans to push fresh air in, then close everything up and run a dehumidifier set to 50%. Unfortunately, the humidity creeps back up to 80% just a few hours later.
2. There's one window I can tilt open, but it has these fuzzy seals around it that I'm unsure about—should I remove them to add foam insulation instead?
3. I've even sealed all windows with plastic and tape and only leave a couple open for air, which is quite a bit of hassle and waste of tape.
I don't want to rely on the dehumidifier constantly, especially since it doesn't seem to keep the humidity down for long after I turn it off. Any ideas on how to better seal my windows or manage the humidity without using AC? Also, are there any other solutions you can suggest that might help?
3 Answers
It sounds like your windows are definitely a source for that humidity. You might want to consider investing in some thicker window sealing options that keep moisture out. I know it sounds annoying, but running the dehumidifier continuously might be key in summer—especially if you’re living in a humid area. Just watch how you manage the air flow, as you need to balance keeping some fresh air in but the dry air too!
Honestly, it sounds like you're facing a classic basement humidity battle. If you can, try sealing the windows better with removable insulation film or weatherstripping that still allows you to open them. Also, while I get that you don’t want to run the dehumidifier all day, keeping it on often and at a lower setting might create a more stable environment. And using a box fan for air circulation could help too!
Yeah, I totally agree. It’s tough without AC, but I’ve found that a constant airflow really helps even if the dehumidifier isn’t running all the time.
If all else fails, think about adding a second dehumidifier or getting a more powerful unit. You could look at brands that are well-reviewed for basement use. Also, ensure that there are no outside drainage issues—good gutters and downspouts can make a big difference. This summer humidity is a pain, but with a few tweaks, you’ll get it under control!
Absolutely! If the moisture problem is persistent, definitely check those exterior conditions too.
Good idea! I had similar problems until I started using heavy-duty insulation on my windows.