Plastered walls issues

Question

Hi
 I will appreciate any advice. 
I had full 2 bedroom renovation done in November/December 2020. All walls  and ceilings skimmed, plastered and painted white. Now straight after the paint dry there were few cracks visible on the ceiling and down the wall corners. Now 4 months on on my hall wall plaster is coming off and paint is fleaky from right on the middle to the bottom, now behind this wall is a bathroom shower with wet wall. ( There is no visible leak, no water on the floor, shower battery is fitted opposite to the wall with issues)  Could there be possible leak behind wet wall or the plastered wall isn't done correctly? I am not sure if I could post a picture to visualise my problem. 
Thanks in advance

Remus · Accepted Answer

Cracks in new plaster are most commonly caused by shrinkage. This is due to factors that have forced the plaster to dry too quickly. If you switched on your central heating while your plaster was drying, or the weather is extremely hot, plaster can dry out too rapidly and crack

Tom · Answer

It's probably the paint you got to go 50/50 with water and paint on the missed coat.

Philip · Answer

Most plastered walls should have two or even three coats of \PVA applied to them, can you recall this being done when you had the job done, it stops damp penetrating through the wall and spoiling the plastered finish. hope this helps

Daniel · Answer

It's hard to tell, the hairline cracks in the corners and on the ceiling is not a problem all that is is shrinkage in the plaster, you can fill them in with easy fill.
It is hard to tell what is wrong with the other bit without looking at the other wall, it does sound like some sort of damp problem from the bathroom.

Simon · Answer

Regarding the ceiling and wall cracks.
All angles, joints and previous hairline cracks should have been reinforced with fiberglass tape prior to plastering coat been applied.

With the issues of flaking paint it could be that a mist coat of paint was not applied to the fresh plaster prior to top coat paint!
Or the it could be an issue with water ingress from the bathroom, a picture will tell a 1000 words!

Plastered walls issues

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