Sealing tape for the window frame

  • Erstellt am 2023-01-21 16:00:47

xMisterDx

2023-01-29 12:50:14
  • #1
If done correctly, Kompriband is certainly the better choice. The problem, however, is: The more complicated and precise something has to be done, the higher the likelihood that something will go wrong somewhere. Especially when the craftsman is working at full speed and everything is done "quick, quick, we have to finish today, tomorrow is the next construction site" or has to be done that way.

I think (from inside to outside) window connection tape - foam - plaster strip with sealing tape is not the worst option. With Kompriband, the error is often made that the "gap" is simply too large or the substrate is not even. Then air whistles through where the foam would have crawled in.
 

Tolentino

2023-01-29 13:56:37
  • #2
In principle and generally you are right. But not here. With the "old" method there are more steps that are complicated and where things can go wrong. Overall it also takes longer. Even for the professional. That is why more and more FB are switching to the "new" method. The material is more expensive, but it saves time. In the future I would also always commission it this way and choose my contractor based on whether he has experience with it.
 

xMisterDx

2023-01-30 00:22:15
  • #3
Uhh yeah. I once walked through the construction area out of curiosity. 80% clearly seal with foam, 20% don’t. The "complicated" part isn’t the steps, but the fact that the compressible tape needs a perfect surface. If the "grip pockets" of the aerated concrete blocks aren’t plastered or you still have the "grooves from Poroton in the reveal," or if you have 10mm at the top and 20mm at the bottom... then your compressible tape won’t sit tightly everywhere... If you hire the window installer separately and do perfect preparation. Okay. But that’s not the case for 95% of the builders. No plasterer comes to the site to plaster the window opening before installation. The window installer will just probably put foam in there... if they use compressible tape, they don’t care about it at all... I prefer 10 windows that are 90% okay rather than 9 windows that fit perfectly and 1 window not at all.
 

xMisterDx

2023-01-30 00:30:32
  • #4
And about the time factor. The window installer has that, that's true. But he also sticks the compression tape without any regard for losses.
In other words... if your window opening is not 100% plastered, square, and level, you will definitely have spots where the tape does not seal well.
And that's when it starts. The window installer says, "Well, I'll just stick it on, if it's not properly plastered, that's not my problem..."
And the builder... had no idea that after the mason the plasterer must come to plaster the window openings for the RAL installation with compression tape...

Or the mason does it. But that costs money and time. Classic left pocket, right pocket. The window installer saves what the plasterer takes more.

As I already said. It is the more modern way to install windows. But everyone in this process must work precisely and know what they are doing. On today's construction site, that can basically only go wrong.
 

dertill

2023-01-30 08:41:18
  • #5


Since the question has not been answered yet: IF the window fits well, you can use a multifunctional sealing tape to seal the gap and instead of cutting it lengthwise, buy it in the width so that it covers the frame in full depth. Everything made from PU that can be compressed is called "Kompriband". Please do not simply take the thin one that is actually only intended for the external rainproof coverage of the connection, but the mentioned multifunctional sealing tape - apply it correctly. Proceed on the window corners and bottom according to the manufacturer's instructions, which is always stated in the datasheet.

If I were to do it myself, I would use adhesive tape on the inside, then foam, and outside the Kompriband for the stop. That way it's easier to see if something is leaking.
 

Tolentino

2023-01-30 08:50:25
  • #6
By the way, the compression tape (multifunction sealing tape) we used didn't mind if the wall opening had a 10 mm gap at the top, 20 mm in the middle, and 15 mm at the bottom. It easily fills up to 50 mm. If it's cold, it may just take longer.
 

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