magpies
Joined: 28/10/06
Posts: 21
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Hi,
I am building a project studio in a double storey outbuilding on my
property. There are no other houses withing 50yards but there is a play area nearby where
local kids play football and such sometimes. Effectively I am looking to soundproof the
building to keep external noise out.
Its a double skin brick building and I was
planning to dryline it with 4" batons, 4" of loft insulation between the batons and 2
layers of plasterboard on top.
Some advice on the proposed configuration would
be much appreciated. Do you think I will get reasonable soundproofing or is it worth
paying extra for acoustic rated plasterboard, insulation and de-couplers ?
Thanks for any help and advice.
Alan
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Weasel9992
Joined: 13/05/08
Posts: 546
Loc: Savannah, GA
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Quote magpies:
Its a double skin
brick building and I was planning to dryline it with 4" batons, 4" of loft insulation
between the batons and 2 layers of plasterboard on top.
Some advice on the
proposed configuration would be much appreciated. Do you think I will get reasonable
soundproofing or is it worth paying extra for acoustic rated plasterboard, insulation and
de-couplers ?
That depends on
your goals. I think what you're describing will give you decent results, yes...as long as
the brick was laid well to begin with. I'd guess you'll achieve something like 50-55dB.
Do I think it's worth it to add quiet rock or something like that? No. 5/8" sheet rock
will work just fine...even better if you isolate your two layers from one another with
Green Glue or something like it. Iso clips can be a great addition though...definitely
worth it as long as you're building the wall out from scratch anyhow.
Good
luck,
Frank
--------------------
Frank Oesterheld - GIK Acoustics
www.GIKAcoustics.com
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James Perrett
Joined: 10/09/01
Posts: 6280
Loc: The wilds of Hampshire
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Doors and windows are likely to be your biggest problem. Double skinned brickwork is a
very good starting point though.
Cheers
James.
--------------------
JRP Music - Audio Mastering and Restoration.
http://www.jrpmusic.net
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magpies
Joined: 28/10/06
Posts: 21
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Thanks Frank, thats great advice and very encouraging. I looked up iso clips on the net
and the systems I saw looked great. It seemed to consist of horizontal metal mounting bars
which I guess fit to the vertical wooden battens on the wall and then rubber mounts which
the plasterboard is screwed on to. Did I grasp that correctly ?
I could only
find US sites 'though. Any ideas on a UK supplier for that system ?
Green glue
looks a good buy too, albeit pricey. I found a UK supplier and I think I will go for that
and glue the second layer of plasterboard to the first using that.
Thanks again
for your help. Alan
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magpies
Joined: 28/10/06
Posts: 21
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Thanks James, much appreciated. I just ordered a new double glazed UPVC window and was
considering adding an extra single glazed sliding pane on the inside and/or heavy
curtains. Which would you advise ?
As to doors luckily the room has no
external doors and opens up into another double skin brick outbuilding which may become a
live room in stage 2. I am going to soundproof the dividing wall in the same way as the
external walls but have no idea how to construct a door. Guess it needs to be very heavy,
well fitted and well sealed. Any ideas about that ?
Thanks again for your
help guys. Much appreciated. Alan
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Setter
member
Joined: 06/11/02
Posts: 500
Loc: Tesside UK
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Quote magpies:
I just ordered a
new double glazed UPVC window and was considering adding an extra single glazed sliding
pane on the inside and/or heavy curtains. Which would you advise ?
For my secondary glazing, the builder
got a normal wooden frame designed for sealed double glazed units. Instead of the double
glazed units I put in thick (19mm!) glass sheet. It works really well!.
J
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Weasel9992
Joined: 13/05/08
Posts: 546
Loc: Savannah, GA
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Quote magpies:
Thanks Frank,
thats great advice and very encouraging. I looked up iso clips on the net and the systems
I saw looked great. It seemed to consist of horizontal metal mounting bars which I guess
fit to the vertical wooden battens on the wall and then rubber mounts which the
plasterboard is screwed on to. Did I grasp that correctly ?
I could only find
US sites 'though. Any ideas on a UK supplier for that system ?
Green glue looks
a good buy too, albeit pricey. I found a UK supplier and I think I will go for that and
glue the second layer of plasterboard to the first using that.
Thanks again for
your help. Alan
Yep, you got
it right Alan. I'm not sure about a UK supplier for iso clips...try searching under "hat
channel". You might have more luck with that. Then again, you UK fellows have lots of
different words for things, so I'm kinda confused much of the time.
GG is
expensive, but it can definitely be worth it in terms of reducing low end mechanical
transmission.
Frank
--------------------
Frank Oesterheld - GIK Acoustics
www.GIKAcoustics.com
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James Perrett
Joined: 10/09/01
Posts: 6280
Loc: The wilds of Hampshire
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A thick (6mm or more) single pane of glass will work provided there is a decent air gap
between the outer double glazed unit and the inner glass. Ideally you want a gap of a foot
or more but I would say that 6 inches is a minimum.
Cheers
James.
--------------------
JRP Music - Audio Mastering and Restoration.
http://www.jrpmusic.net
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magpies
Joined: 28/10/06
Posts: 21
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Thanks Frank, much appreciated, I think I found a supplier now and I am gonna go for
that.
One last question. As I understand it the way to go is to put a layer of
GG in between the two sheets of plasterboard. But is that enough to hold the outside layer
in place or does it have to be screwed too ? My concern is that screws or any mechanical
fixing might counterract the decoupling effect of the GG.
Thanks again for your
help man, really appreciate it and I am much more confident proceeding now. Alan
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Setter
member
Joined: 06/11/02
Posts: 500
Loc: Tesside UK
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No Green Glue is not sufficient on its own. It is not glue really, just a thick
viscoeleastic liquid. You need to screw the second layer into the same isolation
clips/resilent bars as the first lot. It is an entertaining game tryng to guess where the
mounts are if you haven't marked the positions at the wall edges!
The danger is
screwing into the fixed battens and ruining the isolation.
J
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magpies
Joined: 28/10/06
Posts: 21
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Many thanks. Alan
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