During construction the materials in your new home will have absorbed a great deal of moisture. As your new home is lived in and heated, various parts will naturally dry and shrink. This can cause small cracks in the plaster and especially between plasterwork and woodwork – such as where door frames touch walls.
Shrinkage affects all new homes to some degree. You can minimise the effects by keeping your home well ventilated and not overheating it for at least the first 12 to 18 months. The quicker it dries out the more pronounced the effects of shrinkage will be.