Author Topic: Supplementing existing wall to block outside noise  (Read 2036 times)

johnny chen

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Supplementing existing wall to block outside noise
« on: November 21, 2013, 04:44:16 PM »
I apologize if I'm wasting your time, but I'm desperate for help and you guys have great knowledge.

My bedroom used to be a loft but was (poorly) sealed up to make a bedroom. The wall is extremely thin and even normal conversations can easily be heard.

Will putting a layer of soundboard or 5/8 drywall OVER this 86" x 86" wall block out most external noise? Which would work better? Will it not work well since I'm simply putting it over the existing wall and not really sealing any edges? I'm just going to remove the bottom trim and screw it into the existing wall. Gutting the wall is not an option.

Thank you.

Randy S

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Re: Supplementing existing wall to block outside noise
« Reply #1 on: November 21, 2013, 06:24:22 PM »
Put up 2 or more layers of 5/8" drywall. This will give you some reduction...soundboard is a waste of money..you need mass....the heavier the wall is the more noise you reduce and you should seal up any holes or potential leaks...
Randy Sieg

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johnny chen

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Re: Supplementing existing wall to block outside noise
« Reply #2 on: November 24, 2013, 12:25:31 AM »
Well you're right. My brother in law had extra soundboard so I threw up a couple slabs real quick, and very minimal noise reduction. So my brother in law said he could throw up some 5/8 drywall and re-texture etc so it looks like the old wall.

I ordered some green glue to put on the new drywall.

The question is, should I leave the soundboard up and put new drywall over it with green glue? Or just put new drywall on the old drywall with green glue?

jhbrandt

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Re: Supplementing existing wall to block outside noise
« Reply #3 on: December 04, 2013, 06:53:27 PM »
Take out the soundboard if it's not too much trouble. If you have to tear out stuff to get to it, it's not worth it - just leave it in. I really will not hurt anything but take up space in the room.

Green glue can help this situation with the additional damping. Follow the manufacturer's instructions.. don't skimp! Also, be sure that you OVERLAP all drywall joints! You should also use backer rod and caulk at all perimeter wall/ceiling joints. This means all around the perimeter of the ceiling drywall and all around the perimeter of each wall.
More info on my publications page.

Cheers,
John

 

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