Sequence plaster-screed-drywall-plaster

Hello everyone,

in our new building, we decided on a lime plaster including mesh based on the recommendation of our plasterer. The process was as follows:

- Base coat lime (on average approx. 15mm)
- Insulation, edge insulation strip, underfloor heating
- Screed
- Dry construction (gypsum board ceiling on the upper floor)
- Lime plaster including mesh (on average approx. 5-6 mm)
- Fine plaster (approx. 1mm) - still outstanding

Due to this sequence, the following problems arose:
- Edge insulation strip was cut off and "plastered over"
- Gypsum board ceiling was taped off and the paper was partially damaged when removed
- Screed was soiled with plaster and has partially become wet (amount of water unknown)

How serious are these issues from your point of view? Does the screed need to be sanded again for the installation of the floors or is cleaning + priming sufficient?

Thank you & regards

Hello,

the edge insulation strips should have remained completely visible, plastering over them can lead to sound bridges. You have to fill and sand the damaged drywall ceiling before the finish plaster; that is shoddy work, but not a drama. Regarding the screed: if nothing swells, hollow spots or efflorescence are visible, thorough cleaning and suitable priming are sufficient. Usually, you don’t need to sand as long as nothing is loose or heavily uneven.

If the plaster now has contact with the screed, you have a sound bridge. That is a disaster. You should still separate it. I consider the remaining points not to be dramatic.

Thank you for the feedback!

For the most part, it looks like the attached photo. This would mean that despite the cut-off edge insulation strips, there is a decoupling of the screed and the plaster, and no sound bridge should occur, right?

Thank you for the feedback!

Mostly it looks like in the attached photo. So despite the cut-off edge insulation strips, there would be a decoupling between the screed and the plaster, and no sound bridge should occur, right?

Yes, that looks fine. The floor layer would have cut the edge strip anyway....

Meal time,

similar question:
Starting from the shell construction, in what order would you arrange
- interior plaster
- and construction of the metal studs / drywall walls?
The background is, if I screw the CW profiles to the shell construction wall, plaster will no longer fit underneath... (conversely, I would have to do the entire electrical installation beforehand [E-distributor goes into drywall wall] or only plaster directly behind the profile?)

Thanks and best regards