Causes of plaster coming away from wall

Hi nikki36907. This could be caused by a lack of preparation when the walls where skimmed, if they weren't sealed properly with PVA, plaster doesn't adhere to the wall as it should and could have blown, there is no exact time how long this can take. You would need to chip away any areas that have blown (when you tap the wall you'll hear a difference in sound, it will sound hollow), assess, then re-fill. I hope this helps.

Heat from radiators can blow plaster around that era to...or bad plaster blown not taken off before new plaster works applied... small patch repear no problem...

Hi, there are two reasons. 1- The fact that the plastered area is not solid. 2- Not using pva before plastering.

Hi this can be a problem due to poor preparation work from the plasterer who did this to prep these wall properly the walls first need to be scraped from anything loose on the wall such as old flakey plaster or old wall paper etc the wall should then be brushed to get rid of any settled dust and debris and if there are any sticky parts on the wall such as old paste then the wall would need sugar soaping once the wall is free of dust debris etc then the wall can have p.v.a applied there will be instructions on the pva tub for diluting with water which are fine but I tend to use mine quite thick almost like runny yoghurt I know this sounds a little extreme but if it is too runny and the suction on the background is very high chances are you will need plenty of coats so I usually use two good thick coats if ova ensuring I cover the walls evenly this gives a very good adhesion when applying two coats of finishing plaster I hope this helps many thanks Lee 😀