Studio Support Gnome
Not so Miserable Git
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Re: Plasterboard or Render?
[Re: Oliver21]
#925859 - 12/07/11 08:35 AM
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6x2 would do it, you would still need resilient channel though, as they'd be mounted on
the same supporting wall structure, so effectively connected at both ends , and you would
still have to upgrade the floor layer in the room above
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Oliver21
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Posts: 146
Loc: Petersfield, Hants, UK
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Re: Plasterboard or Render?
[Re: Oliver21]
#926284 - 14/07/11 12:43 AM
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This maybe way off but I was thinking. If the idea is to decouple the ceiling
as much as possible from the walls would it help to line the joist hangers with neoprene,
make sure the ends of the joists don't touch the walls and not nail them into the hangers
so they are, in a sense, "floating"?
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Studio Support Gnome
Not so Miserable Git
Joined: 22/07/03
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Re: Plasterboard or Render?
[Re: Oliver21]
#926305 - 14/07/11 08:16 AM
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the square area of neoprene would be insufficient to resiliently support the mass of a
ceiling without total compression.
a stiffer material would have to be
used, and the compliancy of material you need has to be calculated based on the mass of
the entire ceiling, and the number of joists, and so on... AND this all ignores the fact
that you still need a second mass layer to form the other side of the M-S-M relationship
with the floor above.. and a set of 20mm floorboards are not it... it would need
upgrading there as well, which, yes , means modifying built in furniture, and doors and
so on....
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if you don't know who i am, i aint gonna tell you.
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Oliver21
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Posts: 146
Loc: Petersfield, Hants, UK
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Re: Plasterboard or Render?
[Re: Oliver21]
#926454 - 15/07/11 12:40 AM
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would the additional ceiling joists add a significant reduction (all other things you
mentioned being equal) or do you think it would be worth the extra expense and hassle?
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Oliver21
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Joined: 06/01/03
Posts: 146
Loc: Petersfield, Hants, UK
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Re: Plasterboard or Render?
[Re: Oliver21]
#928118 - 19/07/11 07:31 AM
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....urm, bump, I believe is an appropriate word under these circumstances?
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. . . Delete This
Here be Dragons
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Re: Plasterboard or Render?
[Re: Oliver21]
#928149 - 19/07/11 09:27 AM
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with all the other compromises.... on balance, for the minimal difference it would make,
i probably wouldn't bother...
no matter which route you take, the
upgrade of the upstairs floor layer is NOT optional....
if you were
building a separate free standing frame, then it's own joists would be necessary, but
they'd be supported on the wall of the frame... not the existing structure..
and there are still questions about how the floor structure relates to the
walls, where the joists go, whether the upstairs walls are structural or partition ,
whether there are voids that need dealing with...
like i said, it's all
getting a bit site specific.... and critical to ultimate performance...
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Oliver21
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Posts: 146
Loc: Petersfield, Hants, UK
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Re: Plasterboard or Render?
[Re: Oliver21]
#928798 - 21/07/11 12:42 AM
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Right got it. took a while but sunk in now.Thanks for your patience. OK given
that digging the floor up above is probably not going to happen, is there any point in
having resilient channel on the ceiling below as It won't achieve a proper mass-air-mass
type thingy... (I really thought that this was going to be my dream studio but
maybe I'll have to wait until the next house)
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Studio Support Gnome
Not so Miserable Git
Joined: 22/07/03
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Re: Plasterboard or Render?
[Re: Oliver21]
#928840 - 21/07/11 08:59 AM
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there's still some benefit in doing so... but it will be further compromised...
the improvement to the floor need not be all that drastic... it needs to be
airtight and have some mass... this can be achieved by sealing all the gaps, adding a
layer of 2mm SBM5 barrier matting and 19mm t&G "quietboard" on top of it, and sealing it
again ....
doors and built in furniture will require adjusting, but it
is do-able....
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if you don't know who i am, i aint gonna tell you.
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Studio Support Gnome
Not so Miserable Git
Joined: 22/07/03
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i'd choose to do that (and infill the joist voids with 60kg rockwool) , rather than add
layers to the ceiling downstairs and then overlay that with further joists and channel....
because it makes least impact to the available height downstairs,
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if you don't know who i am, i aint gonna tell you.
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Oliver21
member
Joined: 06/01/03
Posts: 146
Loc: Petersfield, Hants, UK
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Re: Plasterboard or Render?
[Re: Oliver21]
#929082 - 22/07/11 12:39 AM
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So the SBM5 would go on top of the existing floorboards then? Luckily headroom
in the garage is something I'm not short of (about the only thing as it happens) I have
about 9' so that wouldn't stop me layering up the plasterboard. Given this, what would you
put on the ceiling downstairs? Cheers O
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