Construction Performance Guidelines
CEILING/WALL JOINT SEPARATION COMMONLY REFERRED TO AS “TRUSS UPLIFT”
Cracks resulting from normal shrinkage are acceptable; crack width in excess of 4 mm is not acceptable.
One-Year - Work and Materials. · Cracks resulting from normal shrinkage of materials caused by drying after construction are excluded from the statutory warranty.
Cracks in excess of the acceptable condition shall be repaired.
Truss uplift may occur when outdoor temperatures are considerably colder than indoor temperatures. It can appear as a minor crack or a larger gap. Repairs should be deferred until such time as the truss returns to its original position. See Also: 9.4 CRACKS IN INTERIOR WALL AND CEILING SURFACES