Which form of fiberglass insulation is sold as blankets or batts for cavity insulation in walls and attics?

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

Answer: (D)

Batt insulation is fiberglass insulation sold as blankets or batts that are designed to fit into wall and attic cavities. The blanket-like sheets can be cut to size and laid between studs or between joists, providing continuous coverage and good thermal performance in tight spaces. Faced batt insulation adds a vapor barrier where appropriate, while unfaced batt is common in areas where a separate vapor control is used. This form is specifically intended for cavity insulation, making it the natural choice for walls and attics.

Rigid boards, in contrast, are solid panels used in different applications and not as flexible for filling irregular cavities. Wrap refers to protective coverings rather than the insulation form itself, and pre form is not a standard term for fiberglass insulation.