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Instructions
- 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
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