ᐅ "Laminated glass 6 mm" or "P4A security glazing"

Created on: 10 Jul 2020 21:46
A
annab377
Hello everyone,
I now have two window quotes that have made it to my personal shortlist:
  • One is a Kömmerling frame with two rubber seals and 6mm (1/4 inch) laminated safety glass (VSG), and
  • the other is a Gealan frame with three seals, where the middle one is a fixed plastic sealing strip. I personally prefer this model because of the additional burglary protection and because it has three seals instead of two. Unfortunately, the Gealan is somewhat more expensive.

The average U-value of both windows is 0.81.

Now my question about the glass:
The Kömmerling profile specifies 6mm (1/4 inch) laminated safety glass for the ground floor windows, while the Gealan profile has P4A glazing. Are these equivalent or can they be compared? Does P4A stand for 4mm or something else? I even read online that you should opt for P5A+. Or is P4A or the 6mm laminated safety glass sufficient for RC2 hardware?

Unfortunately, we cannot install according to RC2 due to roller shutter boxes.

What do you think?
Thanks for your answers.

Here is a picture of the central sealing strip, which I find quite appealing (photo from gealan.de):

Cross-section of a window frame with insulated glazing, seals, and insulation gaps.
Mycraft11 Jul 2020 11:02
It is rumored that in some countries, even having bars on the windows is considered a mark of quality.
A
annab377
11 Jul 2020 11:23
I may not exactly feel sorry for you @nordanney, but it’s fine. In Austria, for example, laminated safety glass (VSG) is mandatory for floor-to-ceiling windows if I’m not mistaken. Are all Austrians poor now?

Hmm, I’ll probably inquire about the thickness of the P4A glass.
11ant11 Jul 2020 13:04
annab377 schrieb:

I also believe that the mentioned Gealan S9000 Plus has an overlap gasket. It has a total of three seals, and the middle one is also a fixed strip. That way, you can’t easily get under the window with a screwdriver, right?
In this particular case, the local patent office must be in the wrong place: a middle “seal” that isn’t elastic couldn’t fulfill its sealing function. As for the claim in the brochure that it at least serves burglary resistance, I won’t comment—except to say that I agree with your assessment to classify a profile “with MD” effectively as an “AD” in this case, and I would recommend the S9000 from this otherwise reputable manufacturer but without the “Plus” addition. Because I believe that this is nonsense.
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N
nordanney
11 Jul 2020 17:09
annab377 schrieb:

In Austria, laminated safety glass (VSG) is required for floor-to-ceiling windows, if I’m not mistaken.

Having to do something is quite different from wanting to do it voluntarily.
Of course, everyone should do whatever they prefer. Personally, I would completely avoid major security measures on windows. But that is my own decision.
A
annab377
12 Jul 2020 12:05
I mean that the regulation in Austria can make sense.

@11ant So you think that the S9000 Plus (the sturdy central sealing bead) is nonsense? Hm, as a layperson I would have said that the central bead is exactly there to prevent a potential burglar from prying deep under the window with a screwdriver. They would be stopped by the sturdy central sealing bead.
11ant12 Jul 2020 23:21
annab377 schrieb:

@11ant so you mean the S9000 Plus (the sturdy central sealing fin) is nonsense?
Exactly.
A seal is only as good as its elasticity – rigid is bad.
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