BRD HUSH ROCK™ laminated drywall is a multi-layer acoustic product designed for use in stud wall and ceiling construction projects where sound separation from space to space is desired. Can be used effectively on new construction and renovation work. A viscoelastic damping core layer creates structural decoupling of the drywall from the wood or metal stud framing members. Standard installation procedures are used for all HUSH ROCK™ products. The model HR-100 grade is 1 1/4" thick and weighs 4.7 lbs/ft.2 while model HR-300 panels are 1 7/16" thick and weigh 5.9 lbs./ft.2 Acoustic performance is enhanced when panels are screwed to studs coated with HUSH BRUSH™ model HBDA-300.