Cornerite is used to reinforce which feature in plaster lath assemblies?

Cornerite is used to reinforce which feature in plaster lath assemblies?

• A. Internal angles over lath
• B. Exterior corners of the wall
• C. At the junction of plaster and insulation
• D. As a nailer for studs

Answer: (A)

Cornerite is a corner reinforcement placed at inside (internal) angles of plaster lath assemblies. Its purpose is to stiffen the corner over the lath, providing a true, rigid edge that helps the plaster resist cracking from shrinkage, movement, and settlement. Interior angles are prone to stress concentration, so placing Cornerite across the inside corner helps the plaster coats bond and stay square as the wall cures and moves. Exterior corners are typically handled with corner beads designed for outside profiles, not Cornerite. Cornerite isn’t used as a nailer for studs or at the plaster–insulation junction; its specific role is reinforcing internal corners over the lath to prevent cracking and maintain a true, durable corner.

Cornerite is a corner reinforcement placed at inside (internal) angles of plaster lath assemblies. Its purpose is to stiffen the corner over the lath, providing a true, rigid edge that helps the plaster resist cracking from shrinkage, movement, and settlement. Interior angles are prone to stress concentration, so placing Cornerite across the inside corner helps the plaster coats bond and stay square as the wall cures and moves. Exterior corners are typically handled with corner beads designed for outside profiles, not Cornerite. Cornerite isn’t used as a nailer for studs or at the plaster–insulation junction; its specific role is reinforcing internal corners over the lath to prevent cracking and maintain a true, durable corner.