What is Roof Truss Uplift? – Home Building and Repairs
This problem occurs when the different parts of roof trusses expand and contract due to changes in temperature and humidity. This movement can cause the ceiling to sag and crack.
One solution is to install crown molding that is attached to the roof truss. This will allow the ceiling to move up and down without damaging the wall. Another solution is to install a block of wood between the wall and the ceiling. This will also allow the ceiling to move without damaging the wall.