What effect can roof truss uplift have on a building?

Roof truss uplift occurs when the roof truss members are subjected to upward forces, often due to wind or temperature changes. This upward movement creates tension in the trusses, which can lead to stress on the structure below. When trusses lift, one of the consequences is that the connection points between the walls and ceilings can experience shifts, resulting in cracks where these two surfaces meet.

Cracks at interior wall and ceiling intersections are typically a direct result of this kind of movement. As the walls remain rigid while the roof lifts, the alignment can be disturbed, causing noticeable separation and cracking in the drywall or plaster at these junctions.

Understanding this effect is crucial for home inspectors as it can indicate structural issues or potential failure, necessitating further investigation and remediation. Recognizing the signs of truss uplift is vital in maintaining the integrity of the building and ensuring that such movements do not lead to more serious structural problems.