Insulation alternatives? (For soundproofing purposes)

Submitted by infinitycurvature t3_1153yrv in DIY

https://imgur.com/a/v2lrfys

I'm just a tiny bit short on rockwool insulation. Is there anything else quick and easy I can substitute? This is only for soundproofing purposes, not temperature.

Can I stuff a few t-shirts in there? Scrap drywall? Some balled up newspaper? Help me not spend another $60 on a package of insulation (in which 90% of it would go unused)!

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pbfarmr t1_j90k0ax wrote

Properly cut the ones you already installed, and you probably have enough for above the door.

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KelevenPlusFive t1_j905fp7 wrote

I would go buy a single roll ($15) of fiberglass insulation. If you are looking to add to the soundproofing, you don't want to do all that work and then skimp on that tiny space. Sound travels everywhere and will find and exploit that weakness.

Do it right, you'll be glad you did.

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clord420 t1_j93dj5r wrote

Rockwool is your best bet, but I don't think that glass door is going to be helping with soundproofing.

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empirer t1_j8zy34y wrote

Can of expanding foam.

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ScockNozzle t1_j93yno5 wrote

Most hardware stores should carry a little utility roll of insulation. Usually 16"x48". Significantly cheaper than a bundle of rockwool, but obviously not as good

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TheRiddler136 t1_j94sq43 wrote

Depends on the frequencies you are looking to block. Low frequencies(heavy base, drums) you need high mass. Like a rubber ect.

Mid and low frequencies fiberglass, rock wholl, foam. Ect.

For what it’s worth you can check out the governments STC 50 wall detail found on page 19 (pdf p.33) of ICD 705 liked below.

ICD 705

If you are looking to block lots of low frequencies you need to curb your expect unless you are ready to drop serious $$ as it’s extremely hard to stop but sound cow makes some great products but expensive.

sound cow

Really for any residential application just get as close to the STC 50 wall detail as you can within reason. Note the double layers of drywall.

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Say-What-KB t1_j93kjex wrote

Please don’t stuff with tshirts or newspaper - fire risk.

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tropicsun t1_j93py24 wrote

Any old pillows?

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Allyfan48 t1_j946fy3 wrote

There’s some special soundproofing insulation out there that you can perches.

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Samanthas-Dad t1_j9dqhpz wrote

You could use spray foam and trim it so it is flush.

I would also look at putting something between the studs and drywall to prevent sound from being from the Sheetrock to the studs and resonate on the other side of the wall. A bead of silicone caulk or rubber elastomer.

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