Which of the following is a common characteristic of spray-foam insulation?

Spray-foam insulation is known for its ability to expand when applied, filling gaps and cracks effectively. This expansion creates an airtight seal, which is a key feature distinguishing it from other types of insulation. By filling voids in walls, attics, and around pipes, spray foam helps to reduce air infiltration, improve thermal performance, and enhance energy efficiency within a building.

Other characteristics of spray-foam insulation include its high R-value per inch, making it an efficient insulator, as well as its role in soundproofing and moisture control. Unlike loose-fill insulation that allows for airflow, spray foam’s expansion properties create a barrier that prevents air movement. While it can be used in both residential and commercial buildings, its distinctive expanding quality is what makes it unique and effective in sealing spaces.