Hole in chimney

[Anaxes]

I have removed a damper from the chimney, which has resulted in a hole approximately 20 centimeters wide and 1-2 centimeters high. How do I best repair this? The flue is not in use and I have no plans to use it, but I want the possibility if I change my mind in the future.

I gratefully accept tips!

 

[Anaxes]

Is there really no one who knows about this?

 

[sinuslinus]

You can join with mortar and a trowel.
Then plaster it so it becomes even. With a type c plaster mortar. You can "cheat" with the same mortar.

However, the texture is difficult to match.

 

[cpalm]

The structure is difficult to match.

Yes, if you want it to look nice, you should probably scrape away about a decimeter of paint around the edges, so that you can plaster to the level of the existing plaster and then paint with the same technique as the existing surface.

 

[Anaxes]

Thank you!
The appearance is completely unimportant, the chimney will be built in with steel studs and plaster.

 

[Anaxes]

Which mortar is recommended?

 

[Claes Sörmland]

Scrape off soot and loose plaster with a metal tool.

Vacuum.

Moisten with a spray bottle.

Prepare some pointed brick chips using a masonry hammer and a brick in advance.

Mix a liter of mortar (C-mortar or lime mortar), fairly loose.

Pour the mortar into the hole so that it is really well filled. Gently tap the brick chips into the mortar.

Smooth with the trowel.

Wait a little and add some more mortar when everything has settled. Smooth with the trowel.

 

[Anaxes]

Thank you very much!
Can this cement work?
https://www.byggmax.se/putsbruk-c-p0113

Scrape off soot and loose plaster with an iron.

Vacuum.

Wet with a spray bottle.

Prepare some suitable sharp brick chips with a masonry hammer and a brick in advance.

Mix one liter of mortar (C-mortar or lime mortar), fairly loose.

Pour the mortar into the hole so it is really filled properly. Gently tap the brick chips into the mortar.

Smooth off with the trowel.

Wait a bit and apply some more mortar when everything has settled. Smooth off with the trowel.

Scrape off soot and loose plaster with an iron.

Vacuum.

Wet with a spray bottle.

Prepare some suitable sharp brick chips with a masonry hammer and a brick in advance.

Mix one liter of mortar (C-mortar or lime mortar), fairly loose.

Pour the mortar into the hole so it is really filled properly. Gently tap the brick chips into the mortar.

Smooth off with the trowel.

Wait a bit and apply some more mortar when everything has settled. Smooth off with the trowel.

 

[Claes Sörmland]

Thank you so much! Can this mortar work? [link]

It will probably work since the hole is so small. Otherwise, plaster mortar generally has finer aggregate (sand) compared to masonry mortar but is otherwise the same thing.

 

[Anaxes]

Aha!
Is this better, worse, or the same?
https://www.beijerbygg.se/privat/sv/produkter/byggmaterial/bindemedel-bruk/bruk/puts-murbruk-c