Just a quick question for you guys who have possibly used this.... I am almost done with wiring and about to put up the sheet-rock. I am trying to see what would be better to use for sound deadening the room. I have seen a product at Home Depot that a salesperson showed me that is supposed to deaden the sound tremendously, and I am wondering if anyone has used it. It is a Fiber board material 1/2" Thick. I had planned on putting up Double Sheetrock, but am wondering if this would be better to use as one of the layers. I just want to quieten the sound from going upstairs. I am not worried about totally stopping it because I know that would be hard. I plan on putting insulation inbetween the joists first, and then the 2 layers of sheetrock or whatever. Thanks for any advice.