Hi, we're building a house and I have an opportunity to pour 1.25" concrete floors instead of using regular or engineered I-joists. The house is three levels, with the HT going in the basement. So there would be a concrete pad separating the HT from the main floor above. Anyone else done this, and what effect does it have on reducing sound transmissions between floors? Even if you haven't done this, what do you think would be the effect?