ᐅ Window reveal preparation before installation... skim coat?

Created on: 13 Apr 2020 13:22
L
lin0r87
Hello everyone,
we are now about to install the windows… As far as I know, the window reveal must always be filled before installation. This has been done everywhere, but as a layperson, I’m not sure if this is correct..? My site manager tends to agree with everything and so does not have much expertise (a request for a replacement has been made).

From the picture, it can be seen that this was done only with cement mortar.
The exterior wall structure is: 1cm (0.4 inches) plaster (interior), 17.5cm (7 inches) Poroton brick, 16.0cm (6.3 inches) insulation, 1.5cm (0.6 inches) plaster (exterior).

Friends who have recently built their homes say that a smoothing coat must still be applied. Is that true, or would this work as it is (see picture) to ensure airtightness?

Innenansicht einer Baustelle: Backsteinmauer, Metallgerüst, Holzbauteile, Ziegelsteine auf dem Boden.
11ant15 Apr 2020 14:34
lin0r87 schrieb:

The rough construction inspection is scheduled for tomorrow; this issue will be addressed again then.
Then note the dispute regarding the proper execution of this point in the report. I cannot form an opinion about the validity of your concerns due to the unclear installation level.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
lin0r8715 Apr 2020 14:43
The installation level should be at the outer edge of the wall. Then insulation and plaster will be applied.

So if that’s what you mean, otherwise I’m at a loss.
G
guckuck2
15 Apr 2020 14:45
@lin0r87
Then just wait for the shell inspection before you start shopping. You can still take care of it afterward.

@11ant
How much longer are you going to get stuck on irrelevant questions?
This is a structural wall; 99.9% of the time, the window ends up between the masonry and the external insulation. You can just take that as a given.
But since you spent the first two pages exposing that “smooth plaster” is an unfamiliar term to you in window installation, I’m wondering what exactly you’re trying to achieve here.
11ant15 Apr 2020 14:53
guckuck2 schrieb:

How much longer are you going to get hung up on irrelevant questions?

The question is not irrelevant.
lin0r87 schrieb:

The installation plane should be at the outer edge of the wall.
Then there will be insulation and plaster added.

That would be in an area where things are actually quite well done here...
guckuck2 schrieb:

99.9% of the time, the window ends up between the masonry and the external thermal insulation composite system (ETICS).

... which in turn would mean that the installation is entirely in front of the level being criticized.
guckuck2 schrieb:

You can just take that as a given.

Exactly why one asks—to avoid assuming facts that are not true in the specific case, just because they are likely.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
D
danixf
15 Apr 2020 14:53
guckuck2 schrieb:

Alternative?

Take plenty of photos and document in writing that the work was done professionally.
guckuck2 schrieb:

There is actually a smooth coat, even if it looks messy.
In my opinion, it should also continue on the outside to allow the external vapor barrier to be fully adhered.
lin0r87 schrieb:

This can be done for an extra charge.
It amounts to about 400€


There is a smooth coat, but it will be properly done for an additional 400€?
So for the next uneven wall, you have to pay 50€ and if the screed is uneven, it’s another 500€? Where is this leading?
The site manager has two options.
a) It is acceptable as it is and nothing will be done.
b) We fix it.

But to say at the beginning that everything is fine and then charge 400€ for corrections? That sounds quite questionable to me.
G
guckuck2
15 Apr 2020 15:12
11ant schrieb:

... which in turn would mean the installation is completely in front of the disputed level.

Yes and no, since the inner membrane is glued against the reveal, which is also difficult without a smooth surface. The same issue applies on the outside because the Poroton also has grooves where the membrane is glued.