Which term refers to the outermost layer of a wall assembly?

Which term refers to the outermost layer of a wall assembly?

• A. Cladding (Outer Facia)
• B. Open cavity (Drainage Plain)
• C. Waterproof Breather Membrane
• D. Sheathing Board

Answer: (A)

Exterior protection and appearance come from the outermost layer, the cladding. This layer is the visible exterior finish that faces weather, wind, and sun, and it provides the first line of defense for the wall while giving the building its look. The other components sit beneath or behind this layer: a drainage/open cavity helps remove moisture that penetrates the cladding, the waterproof breather membrane acts as an air/water barrier behind the cladding, and the sheathing board provides structural backing for the wall. Because it directly serves as the exterior surface exposed to the elements, the term for the outermost layer is cladding.

Exterior protection and appearance come from the outermost layer, the cladding. This layer is the visible exterior finish that faces weather, wind, and sun, and it provides the first line of defense for the wall while giving the building its look. The other components sit beneath or behind this layer: a drainage/open cavity helps remove moisture that penetrates the cladding, the waterproof breather membrane acts as an air/water barrier behind the cladding, and the sheathing board provides structural backing for the wall. Because it directly serves as the exterior surface exposed to the elements, the term for the outermost layer is cladding.