Extending existing ceiling joists?
midiman123
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#1
11th November 2012
Old 11th November 2012
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Extending existing ceiling joists?

I have the fortune to be able to build a homestudio from scratch.
I want to build a solution that Ethan from Real Traps talked about in Doug's homestudio video posted on his site.

That is to fill insulation between ceiling joists, and then cover it with fabric.
My ceiling joists are 15cm long, but I would like to fill it with 30 cm (12 inch) insulation to get the result I want.

I'm thinking that I could extend the joists 15 cm so that I can mount the fiberglas in it.

How would one go about the right way to do this?
Is there a easy, right way to do this?

KK
#2
12th November 2012
Old 12th November 2012
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Ethan Winer's Avatar
 

Lightbulb

I'm not a construction expert, but I wouldn't extend the joists to be lower with heavy wood. Maybe you can make a structure from metal studs or some other light and inexpensive material?

--Ethan

The Acoustic Treatment Experts
midiman123
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12th November 2012
Old 12th November 2012
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[QUOTE=Ethan Winer;8439517]I'm not a construction expert, but I wouldn't extend the joists to be lower with heavy wood. Maybe you can make a structure from metal studs or some other light and inexpensive material?

--Ethan

Thanks Ethan,
Yeah I was thinking of mounting something "L" shaped down from the joists, (15cm long) facing each other on each studs, so that it will keep the mineral wool in place.
(Maybe 30 of them all together across the ceilling)
And then maybe attach metal studs where I can attach the fabric.

But you don't think all that metal will resonate?
Maybe I can find some "L" shaped in wood....?

Thanks,
KK
#4
12th November 2012
Old 12th November 2012
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How about a drop ceiling grid? You can then place panels in each grid and fill above it with fiberglass.
midiman123
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12th November 2012
Old 12th November 2012
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Quote:
Originally Posted by Glenn Kuras View Post
How about a drop ceiling grid? You can then place panels in each grid and fill above it with fiberglass.
Glenn, would that yield the same effect as with fabric and 12inch mineralwool?
And would you have any space between the panels and mineral wool, or just keep it compact?

I really want to"kill" that ceiling so that it feels like it's not there if you know what I mean
#6
13th November 2012
Old 13th November 2012
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The drop ceiling would have acoustic panels and above it I would stuff with fiberglass. You can give yourself a 12" gap from the ceiling now.
midiman123
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#7
15th November 2012
Old 15th November 2012
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This is the solution I came up with:

Attached Images
File Type: png Joists.PNG (66.2 KB, 278 views)
#8
15th November 2012
Old 15th November 2012
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Lightbulb

Looks good.
#9
16th November 2012
Old 16th November 2012
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doubt you need to double up on each side of the joist.

ive seen people make a suspended grid with cheap corner bead. no need to spend a lot of $ whatever would help your ceiling fabric treatment look best is what i would do.
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