As well as having excellent insulation properties, polyurethane spray foam can also be used for acoustic insulation. The type of foam used is a low density open cell structure spray.
Sound Dampening Insulation
Similar to the closed cell foam we use for insulation, our open cell foam is sprayed directly onto the surface and has a strong bond to many different substrates. This bond provides a key advantage over conventional types of insulation with regard to its sound dampening capabilities, which is that it also provides an air-impermeable barrier that seals up and cracks and cavities in the substrate.
The millions of semi-rigid open cells allow low density spray foams to absorb sound waves at various frequencies, providing an excellent sound absorbing barrier.