What is the most common type of insulation used in homes?

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Multiple Choice

What is the most common type of insulation used in homes?

Explanation:
Most homes use glass fiber batt insulation because it's affordable, fits standard framing cavities, and is easy to install. It comes in standard widths that match common wall and attic spaces (like 2x4 or 2x6 walls) and can be faced or unfaced, which makes it the default choice for new construction and many retrofits. Other types—cellulose loose-fill, expanded polystyrene foam boards, and rock wool batts—are used in specific situations (retrofits, exterior insulation, or higher-performance needs) but aren’t as widely used as fiberglass batt.

Most homes use glass fiber batt insulation because it's affordable, fits standard framing cavities, and is easy to install. It comes in standard widths that match common wall and attic spaces (like 2x4 or 2x6 walls) and can be faced or unfaced, which makes it the default choice for new construction and many retrofits. Other types—cellulose loose-fill, expanded polystyrene foam boards, and rock wool batts—are used in specific situations (retrofits, exterior insulation, or higher-performance needs) but aren’t as widely used as fiberglass batt.

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