Green Glue Noiseproofing Compound works great for soundproof ceilings. Adding Green Glue and one more layer of drywall will block noise in both directions. The best news is that you do not have to tear your ceiling down to have better soundproofing. Green Glue is the only soundproofing product that has been specially designed to be used between layers of drywall, so you want to keep the existing drywall there. If you are hearing noise from above or below you can block it, and have a lot more privacy, with Green Glue Noiseproofing Compound. As you can see in the drawing below you do want to have insulation in the cavity between floors, but insulation alone will not block noise like Green Glue will.
Green Glue is a great option for soundproofing your ceiling to block voices, TV noise and music. If your neighbors are simply too loud and causing you trouble sleeping Green Glue and another layer of drywall is the simplest, and least expensive way to go. The installation is easy, all you have to buy is normal drywall not expensive “quiet” sheetrock, and you are on your way to better sleep!
If your noise problem includes loud footsteps, you may not get the best results by using Green Glue alone. All footstep noise travels through anything that is screwed or nailed together. The floor above is screwed to the floor joist, and your drywall ceiling is screwed to the bottom of the floor joist making it very easy for the banging of people above to vibrate all the way down to your ceiling. To get the very best footstep noise blocking you may need to take an extra step by using sound isolation clips to disconnect your ceiling from the floor joist. And if you have a really challenging project, like a home theater causing the noise, we suggest sound isolation clips and two layers of drywall with Green Glue between. Learn more about how sound isolation clips can be used on your ceiling here, Sound Isolation Clips