Hi All, I got an E-mail from a past client (2015) about a crack in the ceiling, asking if it could be structural. Generally wall cracks are not a sign of structural issues (though a structural issue may very well start with cracking) but of movement in the wood. Wood expands and contracts with moisture, here in Maryland there’s lots of moisture, wetter in the summer and dryer in the winter. This movement in the wood framing puts stress on the wall covering and it’s fasteners. Plaster gets brittle over the years and the wood gets very hard. Some where something is going to give = crack. Having said this should observe cracks in a “V” pattern, especially in the corners, this could indicate foundation settlement and should be looked into.