In need of some addvice I have just striped my walls of wallpapper and found a few cracks, problem is one of the cracks is from my neighbours partition fire wall and my outside face wall going upto the top corner of my front window and the other is over the living room door from one corner going straight to the ceiling and beyond as far as I can tell, have several others through out the property one that goes across the concrete floor in the kitchen and from what i can tell it is causing a split in the wood staircase as well, is there any one out there that could give me any idea as to what could be causing this problem