About a year ago a long crack appeared across the whole of the bedroom ceiling on the top floor of the house. Closer to the middle of the ceiling the crack seems wider approx .5mm-1mm. I haven't looking in the loft yet as it is murder to get to. Any ideas what might have caused this and whether it's a serious problem or just decorative.
When we bought the house the survey said that we needed wall ties to the back of the house (room is at the back) could this cause it?
Thanks CB