What is a key characteristic of closed cell spray foam insulation?

Closed cell spray foam insulation is known for its ability to provide structural support in addition to its insulating properties. This characteristic comes from its dense composition, which adds rigidity to a structure, enhancing both energy efficiency and structural integrity. As a result, when applied to walls, roofs, or other surfaces, closed cell spray foam can contribute to overall building strength, making it particularly valuable in areas subjected to high winds or extreme weather conditions.

In contrast to other types of insulation, closed cell foam's density also helps to improve its air sealing capabilities, meaning it can limit airflow leaks better than less dense options. This characteristic enables it to resist moisture penetration more effectively than breathable materials. While each insulation type has its unique benefits, the structural reinforcement provided by closed cell spray foam distinguishes it in applications where additional support is advantageous.