That’s the thing—how do you really know when you’ve sealed it up just enough without going overboard? I’ve seen a few jobs where folks used every sealant and foam they could find, then called me back a year later because their window sills started rotting from trapped moisture. Ever tried one of those humidity sensors near your windows to keep tabs on things, or is that overkill? Sometimes I wonder if a little air exchange is just part of living in an older house...
I get what you mean about overdoing it. A while back, I went a little nuts with the spray foam around my old sash windows, thinking I was sealing out every draft for good. Ended up with condensation on the inside glass when winter hit, and some paint started to bubble on the sill. I’ve never tried humidity sensors—seems a bit much for me—but I do crack the window just a hair sometimes, especially if we’re cooking or after a shower. Old houses just need to breathe a little, I think.
That’s interesting—did you notice if the condensation was worse in certain rooms, or just all over? I’ve wondered if it’s more about how airtight the foam makes things, or if it’s just old windows being tricky. Have you looked into vent trickle vents or anything like that, or just sticking with the cracked window method?
Yeah, condensation’s a sneaky one. I’ve seen it pop up in all sorts of odd places—sometimes it’s just the bathroom and kitchen, sometimes it’s right across the whole house if things are really sealed up tight. When people use foam or those window kits, you basically trap more moisture inside, especially if you’re cooking, showering, or even just breathing a lot (family of four here... we make a lot of steam without even trying).
Trickle vents can be a lifesaver, honestly. They don’t look like much, but they let just enough air move that you don’t end up with puddles on the sills every morning. Cracking the window works too, but then you’re letting in cold air (and around here, that means the heating bill goes up). I’ve had folks try those little dehumidifier pots as a band-aid, but if there’s nowhere for the damp air to go, it just keeps coming back.
Old windows definitely don’t help. If the seals are shot or you’ve got single-pane glass, it’s like inviting condensation to a party. But even with new stuff, if you seal everything up super tight and don’t have any airflow, you’ll probably still get some moisture build-up.
One thing I tell people is to watch where the condensation shows up first. If it’s mostly on the glass itself and not in between panes or around the frame, that usually means you need more airflow. If it’s inside the window unit or around the frame, then you might have a leak or failed seal.
Funny story—my neighbor tried to fix her drafts with duct tape and plastic wrap one winter. It worked for drafts but she ended up with actual ice on the inside of her bedroom windows. Sometimes cheap fixes just trade one problem for another...
If you’re not ready to mess with trickle vents yet, even using an old-school fan in the window for a few minutes after showers or cooking can help move damp air out. Just depends how much effort you want to put in versus how much condensation bugs you.
Condensation really is a pain—fix one thing, and another pops up. I sealed up my old windows with those shrink film kits and it stopped the draft, but then the bathroom started fogging up like a sauna every morning. Guess you can’t win! Trickle vents are underrated, though. I was skeptical, but after installing a couple, the sills stayed dry and my heating bill didn’t spike. If only there was a way to keep the warmth in and the moisture out without all this juggling...
Funny how fixing drafts always seems to kick off a game of whack-a-mole with condensation. I totally get what you mean about the bathroom—mine started fogging up a lot more after I sealed up the living room windows with that plastic film. I guess when you tighten up one part of the house, all that moisture has to go somewhere, right?
Trickle vents really don’t get enough credit. I was worried they’d make the room cold, but honestly, the difference in condensation was immediate and my heating bill didn’t budge much either. It’s wild how a tiny bit of airflow can make such a difference.
If you’re ever up for a slightly more involved project, I’ve seen some folks have luck with heat recovery ventilators. Not cheap, but they pull out the damp air and bring in fresh stuff without dumping all your heat outside. Way overkill for my old place, but maybe someday... For now, it’s just a balancing act between taping up leaks and cracking a window here and there.
You nailed it with the condensation shuffle—sealing up one drafty spot just sends the moisture hunting for a new exit. I ran into the same thing after weatherstripping our old sash windows. Suddenly, the bathroom mirror was fogged up all morning and even the bedroom windows started sweating. It’s honestly surprising how much difference a little ventilation makes, like you said about trickle vents. I was skeptical too, but they really do help keep things balanced without letting the cold in.
I’ve looked into heat recovery ventilators as well, but like you said, the price tag is tough to swallow for most older houses. Maybe if I ever get around to a full renovation… For now, I’m just trying to keep things simple—some basic venting, a dehumidifier in the worst spots, and opening a window when it’s not freezing out. It’s always a trade-off between comfort and efficiency, isn’t it? Funny how these “quick fixes” end up teaching you more about airflow than you ever wanted to know.
Yeah, the condensation game totally caught me off guard too. I sealed up my living room windows with foam tape and plastic film—super cheap, barely $15—but then the kitchen window started dripping every morning. Ended up adding a cheap humidity sensor just to keep tabs. It’s wild how much difference a little airflow makes... I thought sealing was all upside until I had to start cracking a window in January just to keep the walls dry. Always some tradeoff, especially in these older houses.
It’s wild how much difference a little airflow makes... I thought sealing was all upside until I had to start cracking a window in January just to keep the walls dry.
Yeah, totally get this. I did the same thing—sealed up tight, then suddenly the bathroom mirror never cleared up. Kind of a balancing act with these old places... insulation helps, but you’ve gotta watch the humidity or you’re trading drafts for damp. Good call with the humidity sensor, those things are underrated.
- Had the same issue—sealed up every window, felt like a genius until I realized my house turned into a sauna every time I cooked.
- Humidity sensors are a game changer, seriously. Mine started beeping like crazy after a hot shower and I thought it was broken... nope, just needed to crack the window.
- Old houses are stubborn. You fix one thing, something else pops up. I’d rather deal with a little draft than peeling paint from condensation.
- Pro tip: cheap window film is great, but don’t forget to leave a little airflow somewhere or you’ll be wiping down windows all winter.
- Funny how “airtight” sounds good until your walls start sweating.
It’s always a tradeoff with these old places—can’t win, just gotta pick your battles.