How to best repair plaster on a chimney?

[Sulan_gbg]

Hello,

I need your help as I have no experience with plastering etc. My chimney is slightly cracked on the surface, see picture. What is the best way to repair this? My idea was to use husfix, is that correct or do you recommend something else?

When painting afterwards, is regular facade paint okay or do I need something special for plaster?

Grateful for your expertise

Kind regards,
Sulan

 

[Helioz]

Tap away all loose material (also tap over the entire chimney and look for voids). Repair with C-bruk 1mm which you float to make the repairs invisible. Then paint the chimney with the same color it is already painted with, hopefully silicate paint or lime paint as plastic paint is unsuitable for chimneys that are used for fires.

 

[Sulan_gbg]

Ok, thanks for the answer but can I get a little clarification

Look for bom - what is bom?

C-bruk = cement mix or? Is this available pre-mixed or do you buy and mix yourself?

Does "filtar" refer to the way it is applied and what does it mean, or is it just a special trowel?

I don't know which paint was used as I've only lived here for a year, I was thinking of using something like Demideck (water-based) since I have that in white, but it's probably best to use something you recommend then I guess.

Best regards,
Sulan

 

[Helioz]

Ok thanks for the answer, but could I get some clarification

Looking for bom - what is bom?

C-bruk = cement mortar or? Is it available pre-mixed or do you buy and mix it yourself?

To filtar is the way you apply it and what does it involve or is it just a special trowel?

I don't know what paint has been used as I've only lived here for a year. I was thinking of using something like demideck (water-based) since I have white of that, but I guess it's best to use something you recommend.

Regards,
Sulan

Bom = The plaster sounds hollow when you tap on it and must be knocked off.

C-bruk = Pre-mixed Rendering Mortar C 0-1mm fraction

You do filtar with a float:


Absolutely no Demidekk or similar plastic paint on the chimney. You need to find out what type of paint is currently used, that totally dictates the choice of paint.