Underlayment system for installation beneath staple down or nail down hardwood flooring*, Gypcrete or cement board which acts not only as a sound deadener but also as a decoupler by breaking the sound transmission path through the floor-ceiling assembly and prevents noise flanking from room to room. Simply roll out over the subfloor, tape seams for wood flooring and for Gypcrete, prepare the perimeter by installing polyethylene foam or fiberglass board as well as any protrusions through the installation. The product is 5/16″ thick and comes in rolls 5/16″ x 54″ wide x 24′ lengths. As an assembly this product will help you achieve an STC up to65 and an IIC of 69**.

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