“the coldest spots were always at the frames and sills”
That lines up with what I see on jobs. People drop big money on glass, but drafty frames still kill comfort. I swapped out a few old double-panes for triple last year—honestly, the difference was subtle unless you sat right against the window. Ever notice how much more impact you get from sealing up those sneaky air leaks instead?
Couldn’t agree more about the frames and sills being the real trouble spots. Here’s what I tell folks: even the fanciest triple-pane glass won’t do much if you’ve got gaps around the frame. Step one—use a smoke pencil or even a candle to find where air’s sneaking in. Step two—hit those spots with weatherstripping or low-expansion foam. I’ve seen people dump thousands on new windows and still complain about drafts, just because nobody bothered to seal up the old framing. Triple-pane’s nice, but air leaks are the real wallet-drainers.
even the fanciest triple-pane glass won’t do much if you’ve got gaps around the frame
That’s spot on. I did the triple-pane upgrade in my old place—thought it’d solve everything, but the cold still crept in around the edges. Spent a weekend with a tube of caulk and some foam, and that made way more difference than the glass itself. Triple-pane does help with noise and some insulation, but honestly, if your frames are leaky, you’re throwing money away. Patch the leaks first, then see if you even need the fancy panes.
I get where you’re coming from about fixing leaks first—it’s definitely the low-hanging fruit. But I’ll push back a bit on the idea that triple-pane isn’t worth it after that. In my last place (built in the 70s, so not exactly airtight), I did a full window replacement with triple-pane after sealing up every draft I could find. The difference in winter was pretty wild, especially when the temps dropped below -20°C. The furnace didn’t kick on nearly as much, and the rooms by the windows actually stayed comfortable.
Here’s what I found: sealing is step one, for sure, but if you live somewhere brutally cold and your windows are due anyway, triple-pane can really move the needle. It’s not just about drafts—there’s radiant heat loss too, and that extra pane plus better gas fill between layers does help. Not cheap, though... I had to do it in stages over two years.
If your windows are still in good shape and you seal them up tight, maybe just add some heavy curtains or cellular shades for now. But if you’re replacing anyway, triple-pane’s worth a look—especially if you hate cold spots as much as I do.
That’s a good breakdown, especially your point about radiant heat loss. I went double-pane with low-e coatings in my 90s build, and honestly, I still get a little chill by the glass when it’s -25°C, even after air sealing.
Did you notice any issues with condensation or fogging on the inside after the upgrade? That’s one thing I’ve been worried about as I plan my next steps.“if you live somewhere brutally cold and your windows are due anyway, triple-pane can really move the needle.”
Did you notice any issues with condensation or fogging on the inside after the upgrade?
Funny enough, after swapping to triple-pane (mid-2000s house, prairie winters), I actually had *less* condensation than before. My humidity runs around 35% in winter. Only spot I ever see fog is if someone forgets to lock a window tight... then it’s just a little at the bottom edge. Have you tried playing with your indoor humidity settings? Sometimes that makes more difference than the window itself.
- Gotta say, I actually had the opposite thing happen with my triple-panes. Maybe it's just my old 80s house being stubborn, but after the upgrade, I still get some condensation—especially on the north-facing windows.
- Humidity’s a big one, for sure, but even keeping mine under 30% didn’t totally solve it. Seems like the window frames and installation play a role too? My installer mentioned that poor insulation around the frame can mess things up no matter how fancy your glass is.
- Also, my bedroom windows fog up more than the living room ones... not sure if that’s just because we’re breathing in there all night or what.
- Not saying triple-pane isn’t worth it (my heating bill is way better), but if you’re expecting zero condensation just from swapping glass, might be disappointed. Sometimes you gotta chase drafts and check seals too.
- Anyone else notice it varies by room?
Definitely noticing the same thing here. Upgraded to triple-pane last winter in my 1970s split-level, and while it helped with drafts and the place feels less chilly overall, condensation’s still a thing—mainly in our upstairs bathroom and the back bedrooms. I was surprised because I figured the new glass would solve it, but like you said, turns out the frames matter a ton. My installer found gaps in the insulation around two windows, so now I’m wondering how many others are hiding issues.
What’s weird is our guest room barely ever fogs up, but our main bedroom windows are always misty in the mornings. Maybe it’s just more people breathing in there, or maybe it’s the way the vents are set up? Anyone try adjusting airflow or using those little window fans to help? I’m half tempted to get one of those humidity sensors for each room just to see if there’s a pattern, but it seems like kind of a hassle… Has anyone actually solved this completely, or is it just part of living up north?
What’s weird is our guest room barely ever fogs up, but our main bedroom windows are always misty in the mornings.
Totally see this all the time—condensation loves to play favorites. A few thoughts:
- More people = more breathing = more moisture. Bedrooms with two folks (or pets) get foggier.
- Vents matter way more than most think. If airflow’s weak or blocked, that room’s gonna stay damp.
- Triple-pane helps with drafts, but if the install wasn’t tight or if insulation’s patchy, moisture finds its way.
- Humidity sensors are a pain to set up, but honestly, they’re eye-opening. I stuck one in my own bathroom and realized showers were basically turning it into a rainforest.
Haven’t seen anyone “solve” it 100%, especially up north. Best you can do is chase leaks, bump up airflow, and maybe crack a window now and then—even when it feels wrong in January.
Yeah, the humidity thing is wild. I used to think triple-pane would be the magic bullet for condensation, but honestly, like you said, it’s only part of the puzzle. We swapped ours out last year—helped with drafts and our heating bill, but didn’t totally fix the foggy windows in the main bedroom. Turns out, our old house just leaks air in weird places. Cracking a window for a few minutes in the morning actually made a bigger difference than the fancy glass. Go figure.