How to deal with cracks in plastering completed at start of year

Hi. I see this problem constantly. I imagine your house was origionally plastered with lime plaster? So we have the gypsum plaster skim over lime plaster scenario?. If so, as follows applies: This causes a number of problems in a period property in my experience, one of which is cracking. Hairline cracks appear as a result (in my opinion) because the gypsum is a harder material to the lime plaster so expands at a different rate due to temerature changes etc. If there is no evidence of the plaster 'blowing' (you will hear a hollow sound either side of the crack) then you can score and widen the crack to provide a key then fill with filler. Use easifill or toupret. If there is evidence that the plaster has lost adhesion to the background then it has to be removed. Then key, clean what you then have, again fill with filler to slightly proud and abrade. The bad news however is this could re-happen/ more (new) cracks appear. The only long term solution i have used is to paper such walls, ceilings with lining paper. After such prep as above etc. The lining paper i always use for this i 'wallrock'

Houses in Europe are prone to have movement. Hairline cracks are nothing to be concerned of, open up the cracks with knife and skim with easifill, easifill are more flexible than plaster and they are less likely to crack over time! This is the route we usually go down.

I would suggest digging the cracks out more to expose them filling the voids with gypsum bonding plaster then a light fill with some multi purpose filler that should stop the cracks reappearing thanks james

This could be a number of reasons from Poorly prepped walls to just simply everything settling back in from the conversion, movement etc. If there was hair line cracks in the walls before they was re-skimmed it’s a good chance they will have re-opened again. you will find they close up when it’s warm and re-open when it’s cold, try using some filler like a easy fill 45, scraped in tight to the crack when it’s open, stiff wall paper scraper will do the job, and to save sanding later use a wet sponge on the edges of the filler, sponge the edges flat.