Wall & Ceiling Cracks
Cracks are wonderful communicators and literally point to what is going on within a building. Vertical and diagonal cracks tell us that the building is moving. Follow the crack and it will point out a sill or structural shift that may be a problem.
Old age will cause plaster to crack along intersections and seams.
Cracking however, can also be serious and lead to further plaster damage if not taken care of.