ᐅ Straightening and smoothing window reveals – any recommendations?
Created on: 19 Apr 2021 01:51
N
netzplanHello everyone,
We are currently renovating our house to a KfW-55 standard. The windows will be replaced soon. The old windows have already been removed. Larger chips or gaps (from the old roller shutter box or strap winder) have been roughly filled with cement mortar. Now we would like to smooth the window reveals so that the window installer can fit the windows using the Combiband seal.
What is suitable for smoothing the window reveals or leveling unevenness from 0 to 15/20mm (0 to 0.6/0.8 inches)? Thin-bed mortar? Lime-cement plaster? Some kind of filler?
We are currently renovating our house to a KfW-55 standard. The windows will be replaced soon. The old windows have already been removed. Larger chips or gaps (from the old roller shutter box or strap winder) have been roughly filled with cement mortar. Now we would like to smooth the window reveals so that the window installer can fit the windows using the Combiband seal.
What is suitable for smoothing the window reveals or leveling unevenness from 0 to 15/20mm (0 to 0.6/0.8 inches)? Thin-bed mortar? Lime-cement plaster? Some kind of filler?
Winniefred21 Apr 2021 14:42I need to step in here... what exactly did you use to fill the mortar?
Personally, I would do the reveals only after the windows are installed. That’s how we did it at our place. First, we installed the windows with the sealing tape, then plastered, so you can hide the tape right away. For one window, we did it the other way around, and it was harder to cover the tape with filler. When was your interior plaster applied? I used gypsum plaster or lime-cement plaster and then skim-coated it, of course using corner beads for the external corners. I renewed the entire plaster at once, but in our case, everything was falling apart anyway, so it was almost easier to do it all at once.
Personally, I would do the reveals only after the windows are installed. That’s how we did it at our place. First, we installed the windows with the sealing tape, then plastered, so you can hide the tape right away. For one window, we did it the other way around, and it was harder to cover the tape with filler. When was your interior plaster applied? I used gypsum plaster or lime-cement plaster and then skim-coated it, of course using corner beads for the external corners. I renewed the entire plaster at once, but in our case, everything was falling apart anyway, so it was almost easier to do it all at once.
Winniefred schrieb:
I have to interrupt here... what exactly did you use to fill with the mortar? For larger chips (dismantling of the old windows), we used cement mortar. Sometimes there were also bigger holes in the reveal because the house has lightweight concrete blocks with hollow chambers. We filled these "larger" holes with cement mortar. The window installer now says the surface should be smooth because of his compression tape and shouldn’t be that uneven. So the question was what the best way to smooth it out would be.
The plaster is probably from the 1960s. Of course, corner beads would be useful when smoothing, but that would definitely increase the thickness of the interior wall (not the reveal). I would actually install the bead after the windows are fitted (or have it done).
Tolentino schrieb:
Check out recessed reveal smoothing. We have already discussed this here: https://www.hausbau-forum.de/threads/fensterlaibung-vor-fenstereinbau-glattstrich.34465/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Tolentino schrieb:
Check out smooth jamb plastering. In my case, it says to use a facade lightweight plaster for that. Thanks, I found "SG Weber lime-cement lightweight plaster IP 18E" here.
@11ant
Thanks. I think the discussion in my thread can come to a conclusion. (Although this isn’t about whether a smooth plaster layer is necessary or not, but about what is ideally suitable here). From what I see, there’s no need to make a big deal out of it. There are always differing opinions regarding:
- Plaster and masonry mortar / cement mortar
- Lime-cement
- Construction adhesive / tile adhesive / styrofoam adhesive
- ...
I will probably go with this lime-cement lightweight plaster :-) (Since it should be applied at least 10mm (0.4 inches) thick, you cannot just apply from 0-10mm or 0-20mm, but need to build it up).
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