In an earlier post I was asking advice on what brand/model of tub was reccommended. I think I'm going with an acrylic tub from American Standard. (I liked the americast, but thought the 160 lbs would be an issue going upstairs into an alcove). It's been over 20 years since I installed a tub and don't want to get in over my head..............Anyway, I was wondering what to do to underneath of tub to insulate and sound-deaden it? Would it be some kind of spray application? I know that it should be set in a mortar bed, but unsure on the insulation. Thanks for the expertise guys, so far I've picked up a lot of tips from reading your posts.