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Double Vs. Triple Glazed Windows: Which Really Cuts Down City Noise?

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kfisher97
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You nailed it with the asymmetric panes and sealing—those little details make a bigger difference than most folks realize. I’ve found that just filling in those sneaky gaps around the frames can cut noise more than another layer of glass. Heavy curtains are underrated too, for sure. Tried secondary glazing myself in the living room last winter, and yeah, it’s not glamorous but it works. Triple glazing always felt like overkill for city traffic unless you’re dealing with something really extreme. Sounds like you’ve struck a good balance without going broke.


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marys48
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Yeah, sealing those tiny gaps makes such a weirdly huge difference, right? I used to think more glass = less noise, but honestly, after stuffing some insulation tape around the frames, my old double glazing felt brand new. Anyone else tried acoustic caulk? I've wondered if that's worth the mess.


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josenomad411
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I get why sealing gaps feels like a big win, but honestly, I’m not convinced it’s the main factor when it comes to city noise. I did the whole acoustic caulk routine around my old double-glazed units—messy for sure, but didn’t notice a drastic change. The real difference for me came after switching to triple glazing with thicker panes and a wider gap between them. It’s not just about plugging leaks, it’s also about the mass and spacing of the glass itself. Insulation tape is great for drafts, but for street noise, I’d say focus on the window spec first.


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Totally relate to what you're saying about the acoustic caulk—been there, done that, and yeah, it’s messy as heck. I think a lot of people expect miracles from sealing up gaps, but if you’ve already got decent windows, the difference is pretty underwhelming. I remember spending a whole Saturday with a caulk gun, convinced I was about to turn my living room into a library. Still heard every garbage truck that rolled by Monday morning.

It’s funny, though, because I used to think window upgrades were all about keeping the heat in. After moving to a busier street, noise became a bigger deal for me than drafts. Swapping out my old double glazing for triple glazing with thicker glass made a night-and-day difference. It wasn’t cheap, and honestly, I hesitated at first because I thought “how much better could it be?” Turns out, a lot better... especially with those wider gaps between panes. The mass really does matter.

Draft stoppers and insulation tape are great for winter, but for noise, it’s the window design itself that does the heavy lifting. It’s wild how much the thickness and spacing can change things. But I will say, if you’ve got ancient single panes or big obvious gaps, even basic fixes can help a bit. Just don’t expect miracles if the glass itself isn’t up to the task.

One thing I didn’t expect: the new windows somehow made the room feel less “echo-y” too. Maybe just less outside noise bouncing around? Anyway, definitely agree—if city noise is driving you nuts, spec out the windows first and treat the sealing as a bonus. Worth saving up for the upgrade if you can swing it.


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