did a basic plastering course a couple of years ago, (4 Days) and have since done quite a bit of plastering for friends and family with very good results and no cracks.
recently i skimmed over some walls in my own house, its about 70 years old,
with lathe walls, pva 2 coats, skim 2 coats and everything was fine for around 6 months then started getting long hairline cracks.
what is the reason, and what is the best remedy, i.e on lathe type walls would it be better to completely remove the old lathe and replace with new boards.
thanks for any help. :?