To relieve the stresses from expansion and contraction across the joint in large ceiling and wall areas in drywall and veneer finish systems. It is used from floor to ceiling in long partition runs and from door header to ceiling. It is also recommended for repair of existing plastered masonry. Made of roll-formed zinc to resist corrosion, it has 3/32″ grounds. Plastic tape protects 1/4″ wide x 7/16″ deep opening, and is to be removed after installation.
Limitation: where sound transmission and/or fire ratings are prime considerations, an adequate seal must be provided behind the control joint.