Fix the chimney!

[Blomsterbladh]

Hello! Our son has been on the chimney and driven his walker into it, then picked off a lot of plaster. So the question now is what I should use to try to restore it, what type of plaster should I use, and how should I go about getting it as good as possible?

Grateful for an answer.

 

[SågspånPappspikEternit]

Boring answer, but do nothing at all before the little hooligan stops walking around with the walking wagon, risk of more damage until then .

 

[Alexn72]

If you tap the plaster, it should sound solid; if it sounds hollow, more will come loose.

If you're going to repair it, I would start with mortar c or kc.

 

[Blomsterbladh]

Ok, but then I should

If you tap on the plaster it should sound solid; if it sounds hollow, more will come loose.

If you're going to repair it, I would start with mortar c or kc

ok, but then I knock off the loose/hollow parts and then simply apply the mortar. What is the difference between c - kc? Then when it has dried, can I just paint it?

 

[Alexn72]

Ok, but then I should


ok but then I knock off the loose/hollow and then I simply apply the mortar. What is the difference between c -kc? Then when it has dried, can I just paint it?

C is common and kc is more lime.
C is harder than kc.
You want the weakest on the outside. That is, if yours is built with b mortar, you should repair with c.
Knock off.
Wet the surface thoroughly.
Plaster. Keep it moist for at least 1 day. Let dry slowly.
Wait a week and then paint.

 

[Stefan1972]

If it is very brittle, I would guess more that it is hydraulic lime mortar...... Cement becomes hard and rarely crumbles like that just from a little child's play.

 

[Blomsterbladh]

If it is very brittle, I would guess more that it is hydraulic lime mortar......Cement becomes hard and rarely crumbles from just a little child's play.

hmm hard to determine, if you poke it, small grains come off,

 

[Stefan1972]

Lime mortar is so soft that you can easily scrape with something sharp and dig into the material. You can't do that if it's cement mortar. It becomes rock hard.