Soundproofing Ceiling with Double Drywall

[Christian Pirotte]

Hey all,

Just finished my basement unit ceiling. Spent a fair amount trying to make it sound proof and I succeeded with airborne noise, however, footfalls are absolutely terrible. I used two layers of Rockwool, RC channel (big mistake), and a single layer of 5/8" quiet rock. I spoke to a specialized contractor and they said I should tear the drywall down and start over using hat channels and two layers of regular drywall with green glue. Obviously I'm very reluctant to do that as that's throwing away $10,000 in labor and materials. 

I'm more partial to putting up a second layer of regular 5/8 drywall with a layer of green glue in between. Also, pulling up the vinyl plank upstairs and putting in an underlayment with the highest IIC rating. Just wanted to hear others' thoughts on this approach before I spend more money. 

TIA!