Repair corner of wall in the best way?

[Koppen73]

Hey, tore down the wall in between a few days ago and it caused some damage to the existing walls. Does anyone know what material is best to use in this situation? Do I also maybe need to reinforce the corner with some steel rods or mesh since a bit of the lightweight concrete blocks fell off?

 

[Demmpa]

Plaster C or gypsum plaster.

It looks like it's blue concrete, it emits gamma radiation and releases radon gas.

I would have considered tearing down the walls and building new ones.

 

[BirgitS]

I would have considered tearing down the walls and building new ones.

But then it should first be investigated what is load-bearing due to the sloping roof.

 

[Plupp 405730]

Hey, tore down the interior wall a few days ago and there was some damage to the existing walls. Does anyone know which material is best to use in this situation? Do I also need to reinforce the corner with some steel rods or mesh since some of the aerated concrete blocks fell off?

Since you have aerated concrete, you need a low-alkali C-mortar like this one:

https://www.hornbach.se/p/putsbruk-c-finja-lagalkaliskt-25kg/6046269/

I would apply some plaster mesh where more than 20-30mm is missing, which needs to be plastered in a few layers.

Then you can use gypsum plaster for the final finish since C-mortar is coarse. I wouldn't have demolished the walls because it's both expensive to erect new ones and a lot more work😊

 

[Koppen73]

Since you have aerated concrete, you need low-alkali C-mortar like this one:

[link]

I would have added some render mesh where it's missing more than 20-30mm, which you need to plaster in a few layers.

Then you can use gypsum plaster for the final fine finish since C-mortar is coarse, I wouldn't have torn down the walls as it's both expensive to build new ones and a lot more work😊

Thank you so much for the help!👍👍 I'll try this tomorrow and see how it goes.

 

[Johan456]

Since you have lightweight concrete, you need low-alkali C-mortar like this one:

[link]

I would have added some plaster mesh where there's more than 20-30mm missing, which needs to be plastered in a few layers..

Then you can use gypsum plaster for the final finish since C-mortar is coarse, I wouldn't have torn down the walls as it's both expensive to erect new ones and a lot more work😊

I've repaired many damages etc. in lightweight concrete using regular gypsum mortar. You are probably right, but for me, gypsum mortar has worked well. What makes C-mortar better in this case?

 

[Plupp 405730]

I have repaired a lot of damage etc. In lightweight concrete with regular plaster mortar. You are probably right, but for me, plaster mortar has worked well. What makes C-mortar better in this case?

Plaster mortar works, but it becomes more homogeneous with traditional plaster as he has on the remaining parts of the wall. If it had been shallower and minor damage, I would also have just used plaster mortar😊

Low-alkali C-mortar is what you need against lightweight concrete if you choose plaster indoors.