ᐅ Cracks in the ceiling plaster around the chimney – what could be the cause?
Created on: 11 Jan 2022 15:31
B
basti009
Hello,
I have the following situation:
Semi-detached house from 1971
Purchased in 2014 – ceiling was repainted
February 2021: flat roof renovation
The top floor ceiling is made of concrete.
Today, I happened to notice the following in one of the upper rooms:
Cracks in the ceiling plaster, but only in the area around the chimney – that is, behind the wall is the flue of the wood-burning stove, which has actually not been used for over a year.
I am pretty sure that the cracks were not there before the roof renovation, or I just didn’t notice them – after all, you don’t usually look up there every day.
Of course, it is possible that they were already there and the roof at the chimney was not completely waterproof?
They shouldn’t be new, as the roof was renovated just over a year ago.
Also, the plaster doesn’t look damp, nor does it seem to have been damp before, right?
Where could the cracks come from? They don’t bother me, and I would prefer not to do anything to the ceiling like repainting, replastering, or anything else – it still looks fine otherwise.
Does this look more like an acute issue?
Could the cracks have been caused by vibrations during the renovation? Some work on the roof did make the house feel like it shook.
Sorry for the way I’m explaining this, I’m not an expert. Since it is my property, I am just wondering if there might be a cause that needs fixing urgently. Thank you!
Attached are photos. The last one shows the top of the chimney during the renovation.
I have the following situation:
Semi-detached house from 1971
Purchased in 2014 – ceiling was repainted
February 2021: flat roof renovation
The top floor ceiling is made of concrete.
Today, I happened to notice the following in one of the upper rooms:
Cracks in the ceiling plaster, but only in the area around the chimney – that is, behind the wall is the flue of the wood-burning stove, which has actually not been used for over a year.
I am pretty sure that the cracks were not there before the roof renovation, or I just didn’t notice them – after all, you don’t usually look up there every day.
Of course, it is possible that they were already there and the roof at the chimney was not completely waterproof?
They shouldn’t be new, as the roof was renovated just over a year ago.
Also, the plaster doesn’t look damp, nor does it seem to have been damp before, right?
Where could the cracks come from? They don’t bother me, and I would prefer not to do anything to the ceiling like repainting, replastering, or anything else – it still looks fine otherwise.
Does this look more like an acute issue?
Could the cracks have been caused by vibrations during the renovation? Some work on the roof did make the house feel like it shook.
Sorry for the way I’m explaining this, I’m not an expert. Since it is my property, I am just wondering if there might be a cause that needs fixing urgently. Thank you!
Attached are photos. The last one shows the top of the chimney during the renovation.
basti009 schrieb:
There was also insulation on it, but I don’t know how old it is. Can anything be seen here?
Currently, there are 16 cm (6.3 inches) of insulation, which was enough to achieve a U-value sufficient for the subsidy.
One more question:
The energy certificate from 2014 shows:
Energy efficiency class E (demand certificate) with a value of 133.
From 130 upward is class D. Approximately how much would the new roof have reduced that value? It should be class D now, right? Here is the picture of the debris from the old roof. Can it be determined how much insulation was on it?