What does Urea-Formaldehyde Foam Insulation (UFFI) primarily refer to?

Urea-Formaldehyde Foam Insulation (UFFI) primarily refers to a type of spray foam insulation. This material is created by mixing urea-formaldehyde resin with other components to form a foam that expands on application, allowing it to fill cavities and create an effective thermal barrier. UFFI was widely used for its insulating properties as well as its ability to conform to irregular shapes in buildings, making it ideal for spray applications where traditional batts or rigid boards would be ineffective.

Apart from its thermal insulating capabilities, UFFI gained significant attention in the past due to concerns regarding indoor air quality, as the urea-formaldehyde resin can emit gases that may affect some occupants. This has led to a decline in its use and prompted stricter regulations regarding its application.

The other options—cellulose, rigid board, and fiberglass—represent different forms of insulation which are not associated with the characteristics or composition of UFFI. Cellulose insulation is made from recycled paper products, rigid board insulation is typically composed of polystyrene or polyurethane in board form, and fiberglass insulation consists of glass fibers grouped together to form batts or loose-fill insulation. Each of these has its own applications and properties, making them distinct from the properties