Keeping window glass dry: what actually works?

Kind of feels like with old aluminum, you’re always fighting physics.

That’s how it’s felt for me too. I swapped out a couple sashes in my place (built mid-80s, original aluminum frames) and hoped it’d be a game changer - nope. It helped a bit, but the frames still got cold and dripped when it was really chilly outside. I didn’t realize thermal breaks were even a thing until I started researching, but mine definitely don’t have them.

Tried the plastic shrink-wrap insulation kits last winter, and they kept the drafts down, but I still woke up to water puddles on the sill some mornings. The dehumidifier trick worked best for me, though it’s not exactly cheap to run all winter.

Replacing with vinyl windows in one bedroom made a huge difference - no more condensation at all - but man, the price tag was rough. If there’s a permanent fix that doesn’t involve totally new windows, I haven’t found it yet. For now, I’m just managing with the dehumidifier and towels.

the frames still got cold and dripped when it was really chilly outside.

Yeah, same boat here. The plastic kits helped a bit, but the frames themselves are just ice-cold no matter what I try. I’ve heard some folks swear by adding storm windows, but honestly, I’m not sure it’s worth the hassle or cost if you’re planning to replace them eventually. For now, I just keep a towel handy too - low tech but effective enough.

the frames themselves are just ice-cold no matter what I try

Yeah, I get that. The plastic film definitely helps with drafts, but the condensation on the frames is a whole different beast. I tried putting those foam strips around the frame one winter - didn’t really change much, just made opening the window more annoying. Has anyone tried those dehumidifier packs near the windows? Curious if they do anything, or just a waste of time.

I actually tried those little dehumidifier packs last winter, just out of curiosity. Honestly, they didn’t do a whole lot for the condensation on my window frames - maybe helped a tiny bit with the fog on the glass, but nothing dramatic. The cold still crept right in. I’m starting to wonder if it’s just the old aluminum frames in my place that are the real problem... Has anyone had better luck after swapping to vinyl or wood? Or is it just wishful thinking that new frames would solve it?

I’m starting to wonder if it’s just the old aluminum frames in my place that are the real problem... Has anyone had better luck after swapping to vinyl or wood? Or is it just wishful thinking that new frames would solve it?

Swapping out aluminum for vinyl or wood does help, but it’s not a silver bullet. Aluminum frames conduct heat really efficiently, which means cold air outside chills the frames inside, leading to condensation. But even with vinyl, if the glass itself is single-pane, you’ll still get moisture buildup in cold snaps. I upgraded to double-pane vinyl last year - definitely less condensation, but not zero. Air circulation and humidity levels inside matter a lot too. Sometimes people overlook that part.

Air circulation and humidity levels inside matter a lot too. Sometimes people overlook that part.

This is spot on. I’ve swapped a bunch of old aluminum frames for clients, and yeah, vinyl is way less sweaty in winter. But if you’re boiling pasta with all the windows shut, even triple-pane glass won’t stay dry. Had one guy who kept getting condensation - turns out he was drying laundry in his living room all winter... not much a fancy window can do about that. Sometimes it’s not just the frame, it’s what’s happening inside the house too.

not much a fancy window can do about that. Sometimes it’s not just the frame, it’s what’s happening inside the house too.

Yeah, I learned this the hard way. Replaced all my old windows thinking it’d fix the fog, but kept getting puddles on the sills. Turns out running a humidifier nonstop in winter was the real problem... dialing it back made more difference than any window ever did.

That tracks with what I’ve seen. I used to blame my old single-panes for every bit of condensation, but honestly, when I finally got a cheap humidity meter and actually checked the numbers, I realized I was basically living in a rainforest. Sometimes it’s just about tweaking what you’re doing inside, not throwing money at new windows. Still, decent windows help a bit, but they’re not magic.

- Totally get this. I also blamed my windows for years - turns out, it was me boiling pasta like a madman with no vent fan.
- Humidity meter was a game-changer. Once I started cracking a window or actually using the bathroom fan, condensation dropped fast.
- New windows helped some, but yeah, they’re not miracle workers. If you’ve got a jungle inside, even the fanciest glass fogs up.
- Honestly, sometimes it’s just about habits... and maybe not air-drying every sock in the living room.

- Not sure I’d say new windows barely help - when I swapped out my old single panes for double-glazed, the difference was pretty noticeable, especially in the mornings.
- That said, yeah, if you’re cranking out steam like a sauna and never venting, even the best glass will fog up.
- One thing I found: dehumidifiers actually pull their weight if you’ve got a smaller space or no real ventilation options.
- Habits matter, but sometimes the house just needs a little tech backup.