Which insulation type is the most effective at soundproofing?

Mineral wool insulation is recognized as the most effective type for soundproofing due to its dense and fibrous structure. This composition allows it to absorb sound waves more effectively than many other insulation materials. Its inherent properties make it particularly suitable for sound control in multifamily buildings, as it minimizes sound transmission between units, enhancing occupant comfort.

Additionally, mineral wool is not only effective at sound absorption but also possesses good thermal insulation characteristics and is fire-resistant. This combination of attributes makes it a popular choice for both soundproofing and insulation in various applications.

While fiberglass, cellulose, and blown-in insulation have their own benefits, they do not perform as well as mineral wool when it comes to soundproofing specifically. Fiberglass can reduce some noise but lacks the mass and density required for optimal sound control. Cellulose, while decent in sound absorption, is typically more effective for thermal insulation. Blown-in insulation can fill spaces well but is generally not as effective at soundproofing as mineral wool.