Fixed my drafty windows for under $20 - anyone else surprised how easy it was?

Step 2, chase condensation around the house for a week.

That’s the part nobody warns you about. I remember sealing up my old sash windows and suddenly every cold surface had water running down it. Ended up putting a small fan in the bathroom just to keep things under control. Did you notice if your condensation was worse in certain rooms, or does it just follow you around? I’m still figuring out the right balance between warm and “not swampy.”

Did you notice if your condensation was worse in certain rooms, or does it just follow you around?

Yeah, sealing up leaks definitely shifts the problem. Usually, you’ll see more condensation in rooms with higher humidity - bathrooms, kitchens, and sometimes bedrooms if you keep the door closed. If you don’t have an extractor fan in the bathroom, that’s step one. After that, crack a window just a bit during showers or cooking. Sometimes it’s just trial and error until you find that sweet spot between cozy and damp.

That’s reassuring to hear it’s not just me running into the condensation shuffle. I always thought fixing drafts would be a straight win, but then suddenly there was more moisture on the windows in my bedroom, especially after I started keeping the door shut at night. Didn’t expect that trade-off.

I agree about extractor fans - my bathroom didn’t have one at first and the walls would literally drip after showers. Once I got a cheap fan installed, things improved a ton. Still, sometimes I forget to leave the window cracked and wake up to foggy glass. It’s weird how small habits make such a difference.

You’re right, it’s all about finding that balance. Fixing drafts is awesome for warmth, but then you end up playing detective with humidity. Glad to know I’m not the only one figuring this out as I go.

Funny how sealing up drafts seems like such a no-brainer until you realize your room’s turned into a rainforest overnight. I had the exact same thing happen after I put weatherstripping on my old windows - felt like I was winning at insulation, but then the morning fog rolled in... inside. Ever tried one of those little humidity meters? They’re cheap and kind of eye-opening for tracking down which rooms are getting stuffy. I still crack my window just a bit, even when it’s freezing, or else my plants start looking happier than I do.

That’s wild - I didn’t even think about humidity going up after sealing drafts, but it makes sense now that you mention it. I just put some foam tape around my window frames last week, and it’s definitely warmer, but I did notice the air felt a bit heavier in the mornings. I thought maybe it was just me or the weather changing, but maybe it’s actually because the air isn’t moving as much?

I haven’t tried a humidity meter yet, but now I’m curious. Are they pretty accurate for cheap ones? I guess it’d be good to know if my room’s turning into a mini jungle too. I like the idea of cracking the window a bit, even if it feels counterintuitive after all that work to seal things up.

Funny thing - my cat seems to love the new “tropical” vibe, but I’m not sure my books are as happy about it. Might have to experiment with leaving the door open more often or getting one of those little vent fans. Thanks for the heads up!

That’s interesting about the humidity - I had the same thing happen after sealing up my old sash windows. Didn’t really expect it, but I guess all that “leakiness” was doing more for air exchange than I realized. I picked up a cheap digital hygrometer on Amazon (think it was under $15) and honestly, it’s been pretty reliable. The readings bounce around a bit if you move it from room to room, but it gives a decent ballpark. Not lab-grade or anything, but good enough to spot trends.

I totally get what you mean about feeling conflicted cracking the window after all that work. I ended up just opening mine for 10 minutes in the morning while getting ready - seems to help keep things from getting too muggy without losing much heat. Also noticed my dog is way happier with the fresh air, though my houseplants are probably missing the sauna effect.

If your books are starting to curl, you might want to try a small dehumidifier. They’re not exactly cheap, but if you’ve got a lot of paper stuff or electronics in there, could be worth it long term. Funny how fixing one problem sometimes creates another...

That’s funny, I had a similar “wait, why does it feel stuffier now?” moment after doing the rope caulk thing on my 1950s double-hungs. Didn’t realize how much those gaps were helping with airflow until I sealed every last one. I actually went down a rabbit hole reading about mechanical ventilation vs. just cracking a window - seems like a lot of folks end up with condensation issues after tightening things up. Have you noticed any actual mold or just the humidity? I’m debating if it’s worth adding a trickle vent or just sticking to the morning air-out routine.

It’s wild how much of a difference sealing up those old windows can make, right? I did the same rope caulk trick on my 1940s sashes and immediately felt the air get heavier. I haven’t seen any mold pop up, but the humidity definitely creeps higher, especially after showers or cooking. I’ve thought about trickle vents too, but for now, just opening a window in the morning seems to keep things in check. Curious if anyone’s found a low-effort way to balance tight windows and fresh air...

That’s interesting about the humidity bump - did you notice any difference in how quickly your bathroom mirror fogs up after sealing the windows? I’ve seen some folks use small, battery-powered fans with a timer to move air out after showers, but I’m not sure if that’s just trading one problem for another. Have you tried any passive solutions besides opening a window, like those moisture-absorbing tubs or even just leaving interior doors open more often?

Funny you mention the fans - I’ve wondered about that too, whether they just push the dampness around instead of actually getting rid of it. We tried those little moisture tubs once, but honestly, they filled up so fast it felt like a losing battle. Leaving the bathroom door cracked seems to help a bit, but then you get all the steam drifting into the hallway... Have you ever looked into installing a vent (the kind with a humidity sensor), or is that overkill for a small space?