Which of the following is true of welded wire fabric lath?

Which of the following is true of welded wire fabric lath?

• A. It is welded only at some wire intersections
• B. It can be applied to interior and protected exterior horizontal surfaces
• C. It must be at least No. 16 wire
• D. All of the above are true

Answer: (D)

Welded wire fabric lath provides a rigid base for plaster by forming a welded grid where the wires cross, giving a uniform, strong key for the plaster to grip. That welded network stays intact across the surface, which helps resist movement and cracking under plaster loads. It’s suitable for interior applications and for protected exterior horizontal surfaces where the substrate is sheltered from direct weather, as long as the surface is properly prepared and protected from the elements. The standard practice uses wire of at least No. 16 gauge to ensure enough strength and rigidity for plaster work. With these points in mind, all of the statements describe welded wire fabric lath correctly: it’s welded at intersections, it can be used on interior and protected exterior horizontal surfaces, and it requires at least No. 16 wire.

Welded wire fabric lath provides a rigid base for plaster by forming a welded grid where the wires cross, giving a uniform, strong key for the plaster to grip. That welded network stays intact across the surface, which helps resist movement and cracking under plaster loads. It’s suitable for interior applications and for protected exterior horizontal surfaces where the substrate is sheltered from direct weather, as long as the surface is properly prepared and protected from the elements. The standard practice uses wire of at least No. 16 gauge to ensure enough strength and rigidity for plaster work. With these points in mind, all of the statements describe welded wire fabric lath correctly: it’s welded at intersections, it can be used on interior and protected exterior horizontal surfaces, and it requires at least No. 16 wire.