Which of the following is NOT a finish covering type?

• A. PVC cladding
• B. Canvas
• C. Metal
• D. Glass

Answer: (D)

Finish coverings are outer layers placed on insulated surfaces to protect the insulation and give weatherproofing and durability. PVC cladding, canvas, and metal are all practical options because they can be applied as wrappers or sheaths, withstand outdoor conditions, and accommodate movement and daily wear. Glass, on the other hand, isn’t used as a finish covering for insulation. It’s brittle, heavy, more costly, and doesn’t handle thermal expansion or impact well, making it impractical to install and maintain as a protective outer layer. So glass isn’t a finish covering type.