Are cracks to be expected in monolithic wall construction without ETICS?

  • Erstellt am 2021-05-18 19:56:21

Steffen_S

2021-05-18 19:56:21
  • #1
Hello everyone,

I am currently planning my first single-family house as an approximately 250 sqm bungalow for me and my family. By "planning," I mean that I am looking into what building materials are available, how houses are generally constructed, etc.

Here is a rough idea in 3D.



My father is basically an "old hand" and has already built several single-family houses for the family on his own and also acted as "construction manager" or "planner." He is an engineer; I am an IT specialist. I do a lot of research; he tends to take the position "Stick to tried and true." - so we often clash. That’s the background :)

I have now come across Ytong because I like the idea of a monolithic exterior wall without many layers and fuss.

I am interested in the 425mm wall thickness here.

I want venetian blinds on all windows and sliding doors and have seen that the installation of such can be realized like this, for example:



I assume that there are ready-made, insulated boxes like these for it:



and then you could plaster a reinforcement mesh over the joints without "breaking the building material" and have a smooth, clean surface.

My father says, "For God’s sake... take 365mm Poroton T7 or Ytong if you want, and put a slim 60mm thermal insulation composite system (ETICS) over the masonry and shutter box, otherwise you will only have thermal bridges at the boxes, and the plaster will crack there over the years."

He also makes a "drama" about the integration of the 3.5m wide windows and sliding doors regarding venetian blinds and the integration of the boxes into the masonry and lintels, etc. I think to myself: that’s not rocket science nowadays? You see that everywhere; it can’t be that hard, can it?

I want to believe his experience – he has plenty of it – but I also believe that materials and techniques can evolve. Since you read about monolithic construction from time to time and venetian blinds or shutter boxes are not uncommon, I wonder whether they all just accept plaster cracks or whether nowadays this is possibly no longer a problem?

Many thanks!
 

nordanney

2021-05-18 20:04:36
  • #2
Properly processed, everything goes well. P.S. The floor plan looks a bit like an office floor with a meeting room at the end. Terrible...
 

Myrna_Loy

2021-05-18 20:10:21
  • #3
Looks like a video game level. Or a school.
 

Steffen_S

2021-05-18 20:13:23
  • #4
I prefer to remove the floor plan images again - apparently it is otherwise too difficult to focus on the actual question of the thread - which was not "How do you like my floor plan?" :)

The image was meant to convey that there should be many large windows and glass elements and accordingly many / wide roller shutter boxes built into the walls.

I am really more interested in the topic of plaster cracks or problems with thermal bridges in monolithic wall construction without ETICS - the rest is simply a matter of taste.



Can this be interpreted as meaning that no plaster cracks are to be expected even if the ETICS is omitted? What exactly must be paid special attention to then?
 

nordanney

2021-05-18 21:53:24
  • #5
That you find skilled craftsmen. And have an appropriate plan to work from. You don't have to pay attention to anything at all. There are professionals who work for you.
 

Bookstar

2021-05-18 21:55:53
  • #6
Under no circumstances Poroton 365 T7. How does he come up with something like that
 

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