Which type of insulation is commonly used in walls?

The correct answer encompasses the fact that fiberglass, cellulose, and foam insulation are all commonly used in walls for insulation purposes. Each type serves unique benefits and applications, making them versatile options depending on the specific requirements of a building project.

Fiberglass insulation is widely favored due to its lightweight nature, cost-effectiveness, and effectiveness in reducing heat transfer. It is often available in batts or rolls, making it easier to install in framed walls.

Cellulose insulation, on the other hand, is made from recycled paper products and treated with fire retardants, making it an eco-friendly choice. It is typically blown into wall cavities and has excellent air-sealing properties, which can help increase overall energy efficiency.

Foam insulation, whether rigid boards or spray foam, offers superior insulating properties and can provide an air barrier as well. This type of insulation is particularly useful in hard-to-reach areas or for creating a continuous insulation layer throughout the building envelope.

The diversity and effectiveness of these insulation types highlight their common use in walls, allowing builders and architects to choose the most suitable type based on factors like budget, environmental considerations, and specific thermal performance criteria.