- Fasten X-Crack to ceiling trusses or conventional framing members before drywall installation.
- (1) Adjust X-Crack to angle of corner. For inside corners, surface of PVC hinge faces framing members. For outside corners, surface of PVC hinge faces out.
- (2) Using drywall screws, first fasten X-Crack at end of lengths. Align center and fasten to framing members. Overlap X-Crack approximately one inch at joints.
Let X-Crack float over irregular framing members to create a straight line. Six screws per length is all that is required to hold X-Crack in place. The last screws in the field secures drywall to ceiling - and the screws through drywall into body of X-Crack secures inside corners. Install drywall over X-Crack with fine or coarse drywall screws.
- (3) Be sure the drywall screws penetrate the X-Crack product but miss the truss or ceiling joist by 2 to 4 inches.
- (4) The last screw in the field should be 10 to 12 inches away from X-Crack. This allows ceiling members to move independently of drywall joint.
- Use Strait-Flex Mid-Flex250 or Mid-Flex300 drywall tape to finish the application.
X-Crack’s patented hinge and flexible tab design holds drywall joints stationary while structural framing members are allowed to move independently of the drywall.
- (5) Causes for this movement may be due to lumber shrinkage, snow or wind loads, expansive soil, and truss uplift.
- (6) Screws that secure X-Crack to ceiling member Penetrates: X-Crack, Framing Member
- (7) Screws that secure drywall to X-Crack
Penetrates: Drywall , X-Crack
- (8) Last screws in field
Penetrates: Drywall, Framing Member