ᐅ Visible joint pattern on the plaster surface.

Hello everyone,
I have an appointment with my site manager next week. Before that, I wanted to gather some opinions and maybe someone has already experienced the same issue or at least seen it before.

The problem is as follows:

Last week, when it was raining very heavily and the wind was quite strong, our facade suddenly looked like this (see photo). You could clearly see the joints of the blocks through the render and there were slight cracks in the base area. Does anyone have any idea what this could be? Could this indicate a construction defect? For example, an insufficient base coat thickness?

Details about the house:

Year built: 2016
Masonry: 30 cm (12 inch) Ytong blocks, glued
Render: according to the building plan, 15 mm (0.6 inch) base coat and 3 mm (0.1 inch) top coat

I am not a professional, and this does not look right to me.

Probably 20cm (8 inches) blocks that create a significant thermal bridge and have insufficient plastering.

Please write something about the wall construction.

The original poster does have it – 30cm (12 inches) Ytong, see his first post.

Basically, you can see this with any new construction, but the extent is relatively significant here. However, I wouldn’t be worried about it now. CRACKS in the exterior plaster are definitely not normal!

There are several Ytong houses in our new development area that look quite similar. Unfortunately, your choice of gray as a color intensifies this effect significantly.