Red Seal Drywall Finisher and Plasterer Practice Exam 2026 – All-in-One Study Guide for Exam Success!

Sanding the existing texture down before applying a new texture is necessary because it creates a smooth and uniform surface for the new texture to adhere properly. This step ensures that any old imperfections, inconsistencies, or undesirable patterns are minimized, allowing the new texture to appear more seamless and professional. By removing some of the previous texture, you also enhance the bond between the new materials and the surface, leading to better durability and longevity.

Applying a primer coat first, painting over the surface without changes, or leaving the old texture intact and adding a new layer do not adequately address the condition of the existing surface. These methods can result in poor adhesion, uneven appearance, and a possibility of peeling or chipping in the future. Properly sanding creates the ideal conditions for a successful and aesthetically pleasing result.