How To Build A Soundproof Wall 

Awesome! Glad you did a ton of research. That is really what it takes. My goal is to hopefully shorten that research time.

I used green glue so I am not too familiar with tecsound. My bet would be to research carefully if you go the mlv route. Green glue worked great and is highly recommended by the pros.

I agree! I have had a sudden realization that green glue works but is overkill. Although it does help in the low frequencies. I teach two layers of drywall but you could do a layer of MLV and a layer of drywall but I have no idea what the results would be. Thanks for watching.

Thanks for watching! I did a double wall system for my walls and used the hat channel system for my ceiling.

@@soundproofyourstudio awesome, thanks for the reply. Planning on doing a small built out in my basement in 5-6 months. Your content is great

Good question! You definitely want to screw the second layer on as well. Use slightly longer screws so reach the studs and make sure you know where the studs are. If they are every 16" OC then you can use a measuring tape to keep track, but I would also recommend marking the 1st layer just in case so you know where those screws should go.

No I didn’t forget. Using the Rod Gervais method you only need acoustic caulk on the final layer. It is meant to creat the final air gap. One layer does that job. Two could be helpful, but also may waste time and money.

Hey Nikolas, yes the double wall system is better. I recommend using it when possible. The hat channel system works too, but will not be as soundproof.

Great question. You need to add an extra stud to the furring channels don't sag. So yo add another stud next to the corner wall stud. Then add IB-1 clips to the new stud. Leave a .5 inch of furring channel hanging past the IB-1 clip. Now you have two channels meeting at a 90 degree angle in your corners. The soundproofing company has some great diagrams of how to do this.

Thank you so much you’re the best! I appreciate you spreading your knowledge in these videos in a way that’s easy to understand and follow

So I have no longer using those IV three clips at the top of the wall. I don’t think it is really necessary, but I would recommend is not use them. Then you can do the fire stop more easily.

@@soundproofyourstudio ok, that makes sense. Thanks for the tip! So would you use a wall-to-wall connection instead to hold up the second wall? Right now I'm tentatively opting to use a bit of a homemade clip with just a right angle metal bracket, drywall screws, and some neoprene rubber on either side. It's not ideal isolation because the screw is technically still connected through, but I'm not sure of a better way to secure the inner wall properly. I've heard of some good isolated wall-to-wall clips but they seem nearly impossible to find for sale.

Yes I will make a video on that soon.

I believe it was R30

Great question - the insulation will fill the cavity between both walls so you will not need separate bats of insulation for each wall.

Thanks for watching

Using my phone decibel meter the average sound floor is 58db or so outside. The inside is 28db.

I’m not sure I would do that since changing the design changes the acoustic properties. Unless it is lab tested it is hard to say how it will work. Sometimes soundproofing is not intuitive.

I want to do this over existing dry wall

I no longer use Ib3 clips the way I did. The walls once attached are sturdy enough. The double ceiling is even more sturdy. Yes, acoustic caulk all perimeter seems.

​@@soundproofyourstudio Do you use mud and tape on the drywall seems and corners over the caulking? Or just caulking no mud?

Hey Matt! thanks for watching. So yes technically if you had an inside wall inside a house it would be OUTSIDE two layers of drywall w/green glue frame with insulation and airgap and then frame insulation two layers of drywall with green glue. But since my studio is a stand alone structure we couldn't put drywall on the outside. Instead we have hardyplank and OBS board which is still pretty massive. I suppose you could put green glue on the outside in between the OBS and hardyplank. Does that answer your question?

@@soundproofyourstudio Oh, mine is a stand alone structure as well. I just saw you had 2 sheets of drywall instead of 4.

That is correct, although there are four sheets of drywall from the ventilation room to the studio.

@@soundproofyourstudio Great, thanks! I think I am going to hire a contractor to check over my designs.

The clips are specially designed to decouple your inside wall. They are sometimes called sway bracing. Green Glue performs better than MLV according to the lab tests done by a verified third party lab. Green glue acts as a damping agent and does not isolate using mass. Please let me know if that makes sense.

Hi, are you talking about my free clarity call? Happy to help clarify what went wrong for you. Thanks.

$250 an hour for any kind of info