What type of insulation is commonly used in residential attics?

Blown-in fiberglass or cellulose insulation is commonly used in residential attics due to its excellent thermal performance and ease of installation. This type of insulation can fill irregular spaces and cavities effectively, ensuring that there are minimal gaps that can lead to heat loss. Both fiberglass and cellulose materials are lightweight, making them relatively easy to handle and spread across large areas.

Fiberglass insulation is known for its fire resistance and durability, while cellulose, often made from recycled paper products, provides an environmentally friendly option with good energy efficiency properties. The blown-in application method allows for a quick and efficient coverage of the attic space, which is critical for maintaining energy efficiency and comfort in a home.

While rigid foam, spray foam, and mineral board insulation each have their specific applications and benefits, they are not as commonly used for attic insulation in residential settings compared to blown-in materials. Rigid foam is often used in places where a high R-value per inch is required, and spray foam, although effective for sealing and insulating, is generally more expensive and labor-intensive. Mineral board has its applications in commercial buildings or specific industrial contexts.