Concrete or rockwool

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Jayme

Jayme

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Here's a quick question:

What would be better to have, sound wise, as a ceiling; T and G on wooden beams with a 5cm re-inforced concrete screed on top (concrete let into the walls) and a tiled floor on top or T and G on wooden beams with a layer of 5cm thick rockwool (in between battens) and then more T and G on top?
 
By T&G do you mean wood tongue and groove?

Regardless......

You ask what is better sound wise.....
If you mean which will sound better acoustically inside the room... they are ALL reflective so I doubt it will make any real difference, with the exception of the tile might be brighter, but you will have one heck of an echo problem.

If you mean which will block the most sound from transferring through to the next level ... Well simply, whichever will have the greatest mass.

Just make sure the ceiling will support the weight other wise if it caves in on you... you won't be hearing anything.
 
And if you're going to have a hard tile floor, you'll want a fair amount of absorbtion exposed to the room on the ceiling.

Bryan
 
Jayme said:
What would be better to have, sound wise, as a ceiling; T and G on wooden beams with a 5cm re-inforced concrete screed on top (concrete let into the walls) and a tiled floor on top or T and G on wooden beams with a layer of 5cm thick rockwool (in between battens) and then more T and G on top?
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is the tile or concrete facing down or up? this sounds like you're asking what is better for the floor above the room in question. if thats the case, neither one will contribute to sound isolation as impact noise transfer will be high. if this is the ceiling, then its highly reflective and probably not the best for isolation or absorption properties.
 
Sorry, yes, I mean wood tongue and groove.
The room below is the one I'm wondering about.
So, Does that mean that any insulation i put on the floor above will only block sound from transferring through and only the surface of the ceiling will effect the sound quality acoustically inside the room below?
If that's the case then what can i do to the tongue and groove to make it less reflective?

tmix said:
Just make sure the ceiling will support the weight other wise if it caves in on you... you won't be hearing anything.
Click to expand...

Jayme said:
a 5cm re-inforced concrete screed on top (concrete let into the walls)
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Once the concrete is set it will effectively hold its self.
 
Jayme said:
Once the concrete is set it will effectively hold its self.
Click to expand...

Jayme,

sorry but nope - you are wrong - don't have a clue about concrete - 5mc = almost 2" thick - and will not support itself at all - all it will do is add weight to the deck assembly - at roughly 32 psf of load - which is quite a bit of dead load for residential construction.

5 cm wouldn't carry a 40 psf live load (typical required for everything except bedrooms) if it was poured with support points every 2' square.

Rod
 
Jayme said:
So, Does that mean that any insulation i put on the floor above will only block sound from transferring through and only the surface of the ceiling will effect the sound quality acoustically inside the room below?
Click to expand...

the insulation will not block anything. it might dampen the membrane it is closest to or in contact with. don't confuse insulation with isolation.

the construction and materials of the ceiling will affect the sound quality of the room in which it exists. the upstairs floor material will not affect the sound quality other than impact noise or other sound allowed through it.

knowing how you plan to use the studio and expected sound isolation levels is important to determining what will work in your situation. knowing the details of the existing contruction will help determine what can be done to solve your problems... knowing your budget will keep expectations set correctly...
 
Rod Gervais said:
Jayme,

sorry but nope - you are wrong - don't have a clue about concrete - 5mc = almost 2" thick - and will not support itself at all - all it will do is add weight to the deck assembly - at roughly 32 psf of load - which is quite a bit of dead load for residential construction.

5 cm wouldn't carry a 40 psf live load (typical required for everything except bedrooms) if it was poured with support points every 2' square.

Rod
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Oh...... Then my informer is wrong or i misunderstood the answer, maybe he meant that it would hold itself between each beam or somthing? Sorry about that "tmix"!!! You were right! I'll have to make sure the ceiling will support the weight!
As for the acoustics I think I'm going to go with what "Gullfo" said on my other thread...


Gullfo said:
then again, just mounting speakers on stands in the correct spot and adjusting the room acoustics with trapping and broadband absorption can give you excellent results maybe even better
Click to expand...

It seems like a better idea!
 
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