ᐅ Windows: Double or Triple Glazed?

Created on: 24 Feb 2017 12:02
S
Städter
Hello

We are about to finalize a contract with a well-known construction management company. We are deciding between double-glazed or triple-glazed windows. Since we are considering window muntins (grilles), we were advised to choose double glazing because the muntins reduce the thermal performance (U-value) of triple glazing, and the extra cost for triple glazing is not financially worthwhile.

Do you have any tips, advice, or opinions?

Thank you
Y
ypg
24 Feb 2017 14:30
Städter schrieb:
With muntins or without? And if yes, which ones?

Definitely without

I guess it only really matters whether the glazing is double or triple because of energy efficiency.
The muntins themselves don’t affect that, only the window quality does?!

Best regards, in short
11ant24 Feb 2017 14:54
ypg schrieb:
However, it probably only matters whether the glazing is double or triple in terms of energy efficiency. The muntins themselves don’t affect that, only the quality of the windows?!

Continuous muntins—that is, muntins that run through all three glass panes—actually worsen the average U-value of the entire surface. Besides that, a window with 3x3 continuous muntins, resulting in nine individual window "panes," costs more than twice as much as a single large pane without muntins. Applied decorative muntins are comparatively very inexpensive.
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S
stefanc84
24 Feb 2017 15:30
How much extra should triple glazing cost? I wouldn’t have expected such a big difference, since it is actually the new standard.
Opponents of triple glazing often say that it lets in too little light, which can mean, for example, that plants don’t thrive as well.
S
sven0924
24 Feb 2017 15:39
What about security (burglary protection)? At least RC 2 N is recommended, preferably RC 2. We are choosing RC 2 on the ground floor and RC 2 N on the upper floor, all with triple glazing.
S
Städter
24 Feb 2017 15:41
11ant schrieb:
The applied decorative muntins are relatively inexpensive.

Unfortunately, we found that glued-on muntins are significantly more expensive than internal ones because a spacer is placed between the glass panes along the muntins. This means glued-on muntins are essentially redundant and twice as costly. Unless you mean those glued-on later yourself from eBay. But if so, it should be done properly.

But we are getting off-topic.
ypg schrieb:
The muntins themselves don’t affect that, only the window quality does, right?!

Actually, they do, since muntins create thermal bridges.
Y
ypg
24 Feb 2017 15:52
In that case, I would avoid this type of internal muntins!

Best regards in brief