Filling cracks in plaster - ? skim or lining paper

[Sparkysea]

Hi Pistonheads

Please see pictures of inside kitchen wall which was newly built 3 years ago. All is structurally ok but it has had 2.5 years to dry out now and I 'm not sure what to do about the cracks that appeared a few months after drying out when radiators were on.

We used Sika in the mortar mix beneath the plaster to stop damp from the ground and I think the plaster has cracked where the Sika ends i.e. half way up the wall.

Now I just want to address the cracks. I am hoping a reskim would do the job but not sure if cracks would come back? Someone said I would have to put lining paper on wall, which I don't want to do.

If I do skim how is it best to address the cracks first please?

Thanks for your thoughts

[Sparkysea]

[Sparkysea]

Thank you Trev - I'm hoping you mean rake out and fill, sand down and fill again - not fill wait to see if cracks and fill again?

[Sparkysea]

Thanks for all the feedback everyone, I think I will have a go when I don't need radiators on, as will have to remove them...

The plaster was skimmed to plaster board and behind this was a mortar sika mix on top of breaze blocks...

Just wondering how far you scrape out...? not easy to describe I suppose