Hi, I had a bathroom wall skimmed today (to be tiled over) by a professional and crazy paving hairline cracks have appeared over the entire wall as the plaster has been drying out. Having spoken with him, he says it is nothing to worry about and that it is called fire cracking; where the plaster dries out too quickly. (The room is very warm). He states his reputation that it is well bonded and that I will have no problems tiling over it. If it is a cosmetic effect then it doesn't bother me but if it is a bonding issue then the last thing I want to do is to tile now to watch it fall off later!!! He has over 40 years plastering experience so I should just believe him. However I would like to see if there is a concensus of opinion. Hence my question Should I be worried about the cracking or am I being foolish doubting an experienced tradesman?
TIA
Ian