Insulated concrete forms use what insulation material?

Insulated concrete forms use what insulation material?

• A. Fiberglass
• B. Expanded polystyrene
• C. Mineral wool
• D. Polyurethane foam

Answer: (B)

Insulated concrete forms rely on rigid foam panels that stay in place to create the insulated wall while the concrete is poured. Expanded polystyrene is the material most commonly used for these forms because it’s lightweight, easy to fabricate into blocks or panels, and provides a strong insulating value per inch at a low cost. Its closed-cell structure also resists moisture, which helps keep the wall assemblies durable. Fiberglass isn’t used as the form material for ICFs, since it’s not rigid enough to shape and hold the concrete form. Mineral wool is denser and more expensive, making it less practical for standard ICF forms. Polyurethane foam is used in some insulation types or as sprayed foam, but the typical ICF system relies on expanded polystyrene blocks or panels.

Insulated concrete forms rely on rigid foam panels that stay in place to create the insulated wall while the concrete is poured. Expanded polystyrene is the material most commonly used for these forms because it’s lightweight, easy to fabricate into blocks or panels, and provides a strong insulating value per inch at a low cost. Its closed-cell structure also resists moisture, which helps keep the wall assemblies durable.

Fiberglass isn’t used as the form material for ICFs, since it’s not rigid enough to shape and hold the concrete form. Mineral wool is denser and more expensive, making it less practical for standard ICF forms. Polyurethane foam is used in some insulation types or as sprayed foam, but the typical ICF system relies on expanded polystyrene blocks or panels.