Brace a wobbly chimney

[torparn_i_norrland]

Hello,

I have an old cottage where the chimney needs to be rebuilt above the ridge. This is almost done, but what worries me is that the chimney is "a bit" wobbly. It is about 9.5m high, with through irons in the floor joists between the 1st and 2nd floors, likely intended to support a possible tiled stove (I think). At these irons, the chimney seems to be "hinged." I don't see any cracks in the exterior plaster. The question is, how can the chimney be best supported? Is it a good solution to attach two braces (e.g., flat irons) around the chimney to bolt to the nearby rafters and roof beams?

Thankful for ideas and opinions!

 

[torparn_i_norrland]

Hello again,

Does anyone have any ideas or viewpoints?

Regards

 

[Ring]

If the chimney is not stable, it is hardly likely to be tight. Do a pressure test before you spend money on repairs...

 

[Nybyggarn]

If the chimney is built with clay mortar, they are very wobbly, especially when it is so tall. Mine are about 7 meters, and on the roof, you can easily push them.
I don't think it's good to brace it against the house because the house and the chimney always move slightly differently; the chimney expands a bit when it gets warm, and possibly the house moves a little too.
Can't you just leave it as it is and rebuild the top part, maybe use lime mortar so that it also becomes a bit flexible and the boundary is not so marked?

 

[torparn_i_norrland]

It might be made of clay plaster because it has been since around 1850.

Nybyggarn - how much does yours sway? Mine can move 7-10mm but always returns to the "center position," is that comparable to how much yours can move?

 

[Nybyggarn]

I haven't measured, but it's probably at least that much.

 

[torparn_i_norrland]

Ok, thanks for the help Nybyggarn.