soundproofing for urban people

This Green Glue Company video shows how to apply a layer of Green Glue to gypsum board in this video.

Good vibrations? Many of you have probably seen this video already, but I can confirm that even using the Kellett Shake Away pads make a huge difference in reducing the noise from your laundry machine when it goes into the spin cycle. This 2010 video makes the case that the Good Vibrations pads are even more effective than the Kellett pads (which you can easily buy at large retailers like Best Buy). But you should have one or the other under the feet of your laundry machine! It seems crazy that these products aren't better known, or sold automatically as an up-sell with every new machine. Note from 2018: there are newer products on the market that prevent "walking," such as these laundry-machine "pucks" from Green World , which you can find on Amazon.

Resilient channels Some of you might be thinking of installing a suspended (or "floating") ceiling with resilient channels to reduce sound transmission between upstairs and downstairs floors. If you go this route and go to the expense and trouble of demolition and remodeling -- or you're building new construction -- make sure that you affix the channels properly to the wood framing. Improper installation can create a "fail" that continues to allow noise transmission between floors. These illustrations on the UK website "Sound Service" shows a close up of how the resilient channel should be attached to wood floor joists. Attaching them so that they flex away from the wood framing reduces vibration that typically transfers from floor to floor, and this is what's meant by the term "floating." This PDF from Buildsite offers a spec sheet of how to install a resilient channel, but with no illustrations. Added in 2023 : This YouTube video from

You can add mass to your existing walls. As I mentioned in a previous entry, I successfully muted some neighbor noise in my apartment building when I added a second layer of drywall on top of the original 1/2" drywall, with a coating of Green Glue in-between. This produced better results than simply replacing the original wall with QuietRock 525. I made the double-drywall solution even more successful by using QuietRock 510 as the second layer of drywall, with Green Glue in-between the two. Here's a diagram from Trademark Soundproofing  that demonstrates the STC results between different wall assemblies, including those with Green Glue.  Why do I think the Green Glue + layer of QuietRock was better than just replacing the original wall with QuietRock, right on the studs? My theory is that when you add QuietRock directly onto the wood framing, you're still not decoupling it from the structure. And therefore, impact noise and lower frequencies might still come throu

I took a photo recently that shows the cross-section comparison of QuietRock 525 next to QuietRock 510. QuietRock 525 (on the left) is the 5/8" sound-dampening drywall from Quiet Solution, which seems to be partially comprised of concrete. QuietRock 510 (on the right) is the 1/2" sound-dampening drywall from Quiet Solution, and seems to be comprised of two pieces of 1/4" gypsum, fused together with a membrane of other materials in between them. As I stated in my previous post, I think the most effective use of QuietRock products is to glue them with Green Glue on top of another layer of gypsum that's already affixed to the wall studs. Better still, insert insulation between the studs before you put another layer of sheetrock over the existing wall. After a month of curing, I can say that the combination of QuietRock 510 and Green Glue was the most effective of anything I've tried to date.

Two great products work great together. As I've mentioned before, I'm experimenting around with ways to reduce some of the noise problems in my apartment on a tight budget. I think I've found the best combination to date: adding a layer of QuietRock 510 over an existing layer of gypsum drywall with a layer of Green Glue inbetween. This was sort of the best of both worlds: taking a pre-made, sound-dampened drywall and then adding it over a powerful, viscous layer of glue....onto drywall that was already on the wall studs. No demo needed. In this project, I basically added two sound-dampening layers to the original 1950s drywall (one layer in the QuietRock and the other layer created by the Green Glue) to address " flanking noise ": feet, furniture, and shoes pounding on the bare floor of my downstairs neighbors' apartment. The amount of banging, bashing, and foot-stomping sounds coming from their very "wooden" apartment has been severe, and I&

Drop ceilings without demo This video, made by a guy in Greece, shows another interesting approach to the drop ceiling that doesn't seem to involve demolishing the original ceiling. The materials he's using might be slightly different than what you can buy in the USA, but the principle is the same: creating a flexible suspension that keeps the ceiling from being attached directly to the wood joists. The more traditional RC-channel ceiling is detailed here in this PDF from Acoustic Sciences Corporation , which involves attaching metal, flexible RC channels on top of -- and perpendicular to --the wood ceiling joists. It involves: Removing the existing ceiling material in order to access the area Adding sound-dampening materials Attaching the channels across the joists Adding drywall to the channels.  This PDF is a good resource for how to properly attach RC channels, but I notice that in its supply list, it doesn't include some of the newer, superior materi