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Old 12-09-2017, 01:55 PM   #14
e3
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Join Date: Jan 2003
Location: mi.
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Cool

A better way to look at it is, what does the membrane add to the entire assembly.
This is expressed by a delta number ,tested to by ASTM 2179.While not exect,you add the delta to the assembly.( slab,ceiling,flooring ) that is why you need to know whats there.
The slab can range by 10 points depening on ,thickness,density,connection to wall,etc,etc.
A ceiling could be worth 10 points depending on several factors.
Without a sound rated ceiling it is unlikely you will get to a 60 even with a membrane .(any)

With all that said Mapesonic 2 offers a delta of 21...(the higher the better)
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Eric
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