Author Topic: Green glue vs resilient channel  (Read 6179 times)

martin1b

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Green glue vs resilient channel
« on: November 19, 2015, 08:45:00 PM »
Hi, I'm finishing my basement and want noise reduction but am trying not to spend too much.

I'm trying to prevent noise from upstairs and mostly, walking and talking noise.  So, for my ceiling, I need help deciding what is the best way to go. I plan to put either Roxul S&S or some sort of insulation in the cavity (depends on price). From the research i've done, resilient channel along with double drywall with green glue is a great solution. However, there's a lot of ceiling and would prefer to do only one because both would cost a lot.

If you were to choose between double drywall/green glue and resilient channel/single drywall, which would give the biggest bang for the buck?

Thanks!
Bill

Randy S

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Re: Green glue vs resilient channel
« Reply #1 on: November 20, 2015, 04:09:00 PM »
for impact noise / foot fall the channel is best.

for airborne the double drywall and green glue is best..

The channel should be pretty inexpensive so I would suggest you really do both.

Start of doing the channel and drywall and later down the road when you have enough add the second layer with green glue.

Randy S.
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martin1b

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Re: Green glue vs resilient channel
« Reply #2 on: November 21, 2015, 06:01:43 PM »
There are a lot of channel options out there. which one do you suggest? On a ceiling, if I only use 1 layer of 5/8 drywall, can I use single leg or do I need to use double leg for strength?

martin1b

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Re: Green glue vs resilient channel
« Reply #3 on: November 22, 2015, 02:21:14 AM »
Also, are you saying to apply RC directly to joists or through clips? I'm trying to limit lowering the ceiling if possible.

Randy S

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Re: Green glue vs resilient channel
« Reply #4 on: November 23, 2015, 04:29:00 PM »
For best results we use the clips and hat channel 20 or 22 gauge.
But this will drop the ceiling 2" with single layer drywall. 2 5/8" double layer which is by far better then resilient channel.

RC 1 single leg would support 1 layer drywall, I would not load 2 layers.
RC 2 would support 2 layers of drywall.

Resilient channel will drop 1/2" not counting drywall thickness.

resilient channel does not use clips.

Randy S.
Randy Sieg

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888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

martin1b

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Re: Green glue vs resilient channel
« Reply #5 on: November 24, 2015, 12:46:54 AM »
Thanks Randy. I'll go 5/8 drywall at 2 sheets thick.

One more question.  If the drywall thickness will block the lower frequencies, to block the remaining, would it be better to use Roxul, or green glue (if I could choose just 1).

Randy S

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Re: Green glue vs resilient channel
« Reply #6 on: November 24, 2015, 12:52:01 AM »
we you must insulate the cavity no matter what...but these are two different principles...

for impact reduction I would go with the green glue...

Randy S.
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martin1b

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Re: Green glue vs resilient channel
« Reply #7 on: December 26, 2015, 06:21:59 PM »
One more question. When double drywalling the ceiling, when I screw the second sheet in, do I go into the previous sheet or do I go directly into the joist, like the prior sheet.

Screwing into the sheet may not give the necessary strength and going into the joist would short circuit the green glue.

What is the preferred method of attaching?

Randy S

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Re: Green glue vs resilient channel
« Reply #8 on: January 04, 2016, 04:31:37 PM »
Sorry for the delay, I was on vacation.
what you will do is screw the first layer with half the amount of screws then the second layer does get screwed into the joist.

This is why clip and channel are a better way of dealing with impact noise.

Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

 

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