Electrician's shafts - how to fill them?

  • Erstellt am 2015-12-31 10:28:53

Sebastian79

2015-12-31 14:02:27
  • #1
Of course, you can use mortar, what should deform there - especially if lime-cement plaster is used afterwards.

If gypsum plaster, then smear it with that stuff, whereby only larger slits need to be worked on beforehand, the rest is done by the plasterer during the plastering itself.
 

Mycraft

2015-12-31 15:50:33
  • #2


The boxes will deform if you use cement/mortar... because, unlike plaster, it shrinks significantly when drying...

It's only a few millimeters, but that's enough for crookedly seated socket inserts afterwards.
 

Sebastian79

2015-12-31 15:51:35
  • #3
I cannot confirm...and everything was sealed with mortar.
 

Peanuts74

2016-01-08 12:36:18
  • #4
Regarding the initial question, for a new house the energy demand is calculated anyway based on the insulation values of the walls and windows etc. No one actually measures the real value later. In that respect, it’s completely irrelevant for Kfw. Our plasterer simply plastered everything and so far everything is great...
 

SirSydom

2016-01-08 13:10:05
  • #5
Gypsum does not get along well with cement! So it depends on the plaster.. Often tile adhesive is also used.
 

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