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Old 9th February 2008, 04:37 PM   #1
arjan
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trying to avoid a triple-leaf system...

hi all,

i am building a studio in an old building behind my house.
the studio will have a life-room, a control room and two boots.
everything will be built as described in rod gervais book "home recording studio - build it like the pro's"

right now i am thinking of the best way to "fix" my roof.
for the moment the roof is a thin layer of eternit.
thats a building material often used here in belgium.
its thin plate with waves in it (?) i dont know the name in english so thats the best way to describe it. it is absolutely NOT good for soundproofing.
my budget doesnt allow me to put a new roof on it so i'll have to "fix" it.

the first drawing is the minimum. it is the roof - untreated - and the ceiling of my inner room.

the second one is the easiest solution. but i am afraid to create a tripple leaf system like this. or maybe the existing roof is negligible as a leaf???

the third one is what i think is the best solution. it will surely be more work... but will it be better??

maybe someone knows of a better solution?

any help is very appreciated.

arjan
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Old 9th February 2008, 09:38 PM   #2
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IŽd definitely say the third version will be superior!

go for it !!
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Old 10th February 2008, 01:54 PM   #3
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if you roof is thin enough or has air gaps, then the second option will work and you might get a slight 3rd leaf effect, but it may be more effective overall from a proper construction standpoint. if you can beef up the existing roof between the joists then do that, but if not, make sure the density of the "middle" layer is heavier than the roof layer (assuming structurally it can support it).
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Old 10th February 2008, 07:13 PM   #4
arjan
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hey gulfo!

thanks for the help!
here is a pic of the roof. the studs are 6 by 18 cm and the distance between them is 90cm.
the roof material is eternit. that is some kind of fibre-alike material made of 80% cement and 20% asbest.
the plate is 3 to 4 milimeter thick.
the plate has waves in it, grooves, or whatever the right word in english is (can someone tell me?) the depth of the grooves is 7cm.

should i fill the whole space between eternit and drywall with fibreglass?
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Old 11th February 2008, 07:06 PM   #5
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I think PU will do (it will couple the eternit to the drywall - someone correct me if I'm wrong) and is easy to apply.


Be carefull with the asbest and check if the beams can support the added weight.



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