Does Batt Insulation Block Sound?

Will adding batt insulation between the studs in my wall or ceiling block sound?  I probably get this question at least once a day; the short answer is NO!

Lightweight porous materials such as fiberglass and open cell foam are great for reducing reverberation in a space by absorbing the sound reflections off of hard surfaces such as plaster, drywall or concrete block, but they will not prevent sound from passing through them. A material's ability to block sound is a direct function of its mass. Heavy dense materials will block sound; light porous materials will absorb sound.

So the solution is to reduce the airborne noise by adding weight to your wall or ceiling partition with a flexible mass loaded vinyl barrier, and reducing the structure borne noise by decoupling the partition with sound isolation clips.

 

 

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