ᐅ Masonry is crumbling! Is there a risk of collapse?

Hello,
We recently purchased a detached house and are currently renovating the attached kitchen. When removing the plaster, the lower masonry started to crumble. It can be removed quite easily with a hammer, so I suspect that the former exterior wall might be unstable.

Should I have a bricklayer or mason take a look at it?

Best regards, Jens

When was the house built? It definitely looks like it dates back quite a while, for example, because the plaster contains straw or manure. Additionally, the wall construction is somewhat unusual, but in the case of a potentially quite old house, this should only be a minor concern. It would also be normal for the plaster and mortar to be crumbly, especially if they contain a higher sand content.

What makes me most suspicious is that you can hardly see a solid wall, but only individual stones. However, if the house is, as I would suspect, quite old, this is only somewhat worrying. Consulting a professional, if possible, would certainly not hurt.

The year of construction was given as 1972. However, both we and the building surveyor suspect that it actually dates back to the 1950s.

That's right, I also don't see proper masonry, just three bricks between clay and other materials.

1972? Looking at that, I would rather say it’s from the post-war period.

I can also still see remnants of this blue plaster (lime paint) there. It used to be quite common in the past.
I would definitely date it to before 1950 and would also consider the post-war period.

Patricck schrieb:

1972? Looking at it, I would rather say post-war period.

I agree.
But even according to the energy performance certificate, the house dates back to 1972.
I will probably have to check with the local authority about the official year of construction.

In my opinion, based on the building plans, the house was last renovated in 1972. And now this date is being used as the construction year...