Roof Truss Uplift Cracks

Repair roof truss uplift problems before the start.

Roof truss uplift cracks.

There are a multitude of things that can be causing these cracks. Trusses are designed to carry the weight of the roof on the ends that is the outer walls. Truss factor factory built roof trusses generally arrive at the job near their maximum allowed moisture content and drywall usually gets hung before the trusses. Although truss uplift causes approximately 20 percent of problems like yours it s something you should consider.

Arched roof trusses moving in response to moisture temperature variations across the truss can lift the building ceiling sufficiently to cause. Here we provide a definition of arching roof truss damage or roof truss uplift and we explain why truss uplift occurs where truss uplift cracks will appear and how roof truss uplift cracking can be avoided or corrected. When building a new house the framing contractor should secure the interior partitions to the trusses with truss clips. Truss uplift may cause drywall tape to come loose or ripple as well as drywall cracks where a wall meets the ceiling area.

The first case is a foundation problem. Truss uplift when a newer house shows signs of interior ceiling corner cracking at the top floor in the winter this can normally be associated with truss uplift. Roof truss uplift occurs when the bottom chord of the truss is exposed to significantly different moisture and or temperature conditions than the rest of the roof truss. If a seasonal crack opens along a wall somewhere in the middle one or both truss ends are rising or the truss is arching.

Truss uplift usually occurs when the truss is exposed to a change in moisture and or temperature conditions causing the truss to arch up in the center. Usually this occurs on the interior walls especially the ones that run perpendicular to the direction of the trusses. Roof truss uplift occurs when the bottom chord of the truss is exposed to significantly different moisture and or temperature conditions than the rest of the roof truss. The key to preventing truss uplift cracks and screw pops in the first place is to avoid nailing or screwing the ceiling drywall to the bottom of the trusses at or near the intersection.

If not and you need to repair existing truss uplift problems complete your repair in two phases during winter and summer by using proper l brackets drywall clips and retention blocks. When a house shows signs of interior ceiling corner cracking at the top of the wall it is commonly due to truss uplift. When a newer house shows signs of interior ceiling corner cracking at the top floor in the winter this can normally be associated with truss uplift. The first thing that comes to my mind is a phenomenon called truss uplift.

If you happen to be building a house now borrow a step ladder and inspect the trusses which pass over interior walls.