In construction, which fiberglass form is typically supplied as rigid sheets used to insulate flat surfaces?

• A. Board
• B. Pre form
• C. Wrap
• D. Batt insulation

Answer: (A)

Rigid sheets are used for flat surfaces because they provide a solid, uniform plane of insulation that can be cut to size and installed over walls, ceilings, or floors without sagging or gaps. This form, fiberglass board, comes as flat panels that stay rigid and install as continuous sheets, which is ideal for covering large flat areas efficiently. Other forms don’t fit this use: pre form implies molded shapes for curved or specific contours, wrap is a protective covering around objects, and batt insulation is a flexible blanket or roll that fits cavities rather than being a rigid sheet.