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<blockquote data-quote="Rudy" data-source="post: 4725293" data-attributes="member: 568035">Products like Ensolite, Second Skin Overkill, etc. are marginal absorbers and very poor barriers by themselves. As Megalomaniac said, if you really want to block sound, you&#039;ll want a heavy, high density material like mass loaded vinyl or lead, floating on a layer of foam.When it comes to absorbing sound, you need a material that 1/4 as thick as the wave is long. A 1/8&quot; thick material like Ensolite will only absorb ~ 27 kHz and above. 1/4&quot; gets you to ~ 13.5 kHz and above - helpful, but not spectacular.Following RAAM&#039;s &quot;Ensolite everywhere&quot; advice does a few things. It adds a layer of protection for the RAAMmat underneath. It increases the thickness (and therefore absorbing capacity) of the carpet, headliner, etc. One of it&#039;s most important functions is gasketing trim panels so they won&#039;t vibrate.If you want to use these products to block sound, you need to layer them - mat/foam/mat/foam - in the path of the noise. This creates a less effective barrier than 1 lb/ft² MLV or lead and foam, but it is still pretty good - very close to the.5 lb/ft² stuff.You don&#039;t really need to glue these foams down on the floor when they will be covered and held in place by carpet. I don&#039;t do it because it just makes it harder to get under it if you need to. You don&#039;t need a whole lot of adhesive to do the rest.</blockquote>

[QUOTE="Rudy, post: 4725293, member: 568035"] Products like Ensolite, Second Skin Overkill, etc. are marginal absorbers and very poor barriers by themselves. As Megalomaniac said, if you really want to block sound, you'll want a heavy, high density material like mass loaded vinyl or lead, floating on a layer of foam. When it comes to absorbing sound, you need a material that 1/4 as thick as the wave is long. A 1/8" thick material like Ensolite will only absorb ~ 27 kHz and above. 1/4" gets you to ~ 13.5 kHz and above - helpful, but not spectacular. Following RAAM's "Ensolite everywhere" advice does a few things. It adds a layer of protection for the RAAMmat underneath. It increases the thickness (and therefore absorbing capacity) of the carpet, headliner, etc. One of it's most important functions is gasketing trim panels so they won't vibrate. If you want to use these products to block sound, you need to layer them - mat/foam/mat/foam - in the path of the noise. This creates a less effective barrier than 1 lb/ft² MLV or lead and foam, but it is still pretty good - very close to the .5 lb/ft² stuff. You don't really need to glue these foams down on the floor when they will be covered and held in place by carpet. I don't do it because it just makes it harder to get under it if you need to. You don't need a whole lot of adhesive to do the rest. [/QUOTE]

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