When applying fiberglass reinforcing mesh to a wall crack, what is the correct sequence for embedding?

• A. Embed the mesh smoothly into a pre-applied layer of joint compound, then cover it completely.
• B. Place mesh on surface with glue and leave it visible.
• C. Wet the mesh with water then press into paint.
• D. Position mesh after final coat dry.

Answer: (A)

The main idea is that fiberglass mesh must be embedded within a bonding layer so it becomes part of the finished surface. Start by applying a layer of joint compound over the crack to create a bed. Then press the fiberglass mesh into that wet coating so it adheres flat and lies smooth. After it's set, cover the mesh with additional joint compound to fully conceal it and feather the edges. This sequence ensures the mesh reinforces the repair and the surface remains uniform for sanding and finishing.

If you leave the mesh visible on the surface, or press it into paint, or try to place it after the final coat is dry, you miss the bonding and protection the mesh provides, leading to weak reinforcement and a bumpy final finish.