Keep dust and pollen out of the home
There are environmental advantages as well; most notably, there aren't any fiberglass particles floating around in the air. Spray foam insulation also does not cause itching when it is touched, and it inhibits mold growth because it doesn't absorb water.
Adheres well to surfaces
Spray foam insulation also adheres well to surfaces, so it can stick to the inside of walls or can be applied to the underside of floors and insulate from underneath. Homes that are insulated with spray foam often have a higher resale value than those that use fiberglass insulation or other types of insulation.