Cornerite must be installed to keep its position during plastering at all internal corners.

Cornerite must be installed to keep its position during plastering at all internal corners.

• A. True
• B. False
• C. Only for exterior corners
• D. Not used in plastering

Answer: (A)

Internal corners are where two plaster surfaces meet and are especially prone to movement and cracking during application and setting. Cornerite provides a rigid, stable edge at these corners, giving a true, square corner for the plaster to grip onto on both sides. By installing Cornerite at every internal corner, the corner stays in the correct position as plaster is applied and sets, preventing shifting that can lead to cracks or an uneven edge. Exterior corners use different edge devices, but the purpose—keeping the corner true and stable—is the same. So, this practice is necessary for all internal corners.

Internal corners are where two plaster surfaces meet and are especially prone to movement and cracking during application and setting. Cornerite provides a rigid, stable edge at these corners, giving a true, square corner for the plaster to grip onto on both sides. By installing Cornerite at every internal corner, the corner stays in the correct position as plaster is applied and sets, preventing shifting that can lead to cracks or an uneven edge. Exterior corners use different edge devices, but the purpose—keeping the corner true and stable—is the same. So, this practice is necessary for all internal corners.