Hello, 

there are cracks in this part of this house ( only here, not somewhere else ) ; they are less than 2 mm or max 2 mm

 

is this dangerous and what to do ? thanks 

 

https://www.casimages.com/i/210616082328840088.jpg.html

Probably just cracks in the render, fill and paint.

Nothing on the inside in the same location?

18 minutes ago, sungod said:

Nothing on the inside in the same location?

The same, but very thin, starting from the window, up and down then there is a tiled floor, so I can't see the wall, to the right of the photo because it is a bathroom

14 minutes ago, Aforek said:

The same, but very thin, starting from the window, up and down then there is a tiled floor, so I can't see the wall, to the right of the photo because it is a bathroom

Take some of the render off see if the blockwork is cracked aswel, if not just patch it back up and repaint, a different colour.

Looks like real cracks,tell tale in the window corner.

Probably no frame poured around the window frame,just fill it in and repaint.

How old is the house and when did the cracks appear?

Does not look like a real structural problem,just keep an eye on it.

 

 

Look at it as an opportunity tp practise some Kintsugi. Fill cracks and paint either gold or a contrasting colour.

 

 

 

3 minutes ago, VocalNeal said:

Look at it as an opportunity tp practise some Kintsugi. Fill cracks and paint either gold or a contrasting colour.

 

 

 

Ha...glanced through the thread and thought OMG......then realized this isn't his cracked wall

I had mushrooms growing in the corner of my bedroom about 6 years ago.

 

 

Tracked it down to water seepage through a crack next to guttering at the back of the house. 

 

That crack was "fixed" by chiseling it out to about 4cm wide and filling it with white stuff. Now, 6 years later, the white stuff has a new crack of its own about 1/2 mm wide. But no more water in the bedroom. Yet.

 

 

 

 

Generally, you don't need to worry about these kind of cracks. They may allow insects to enter the house is all. 

Buy a silicon filler or similar, apply, repaint. Maybe do again in a few years.