Wall/ floor design #2 for drumroom

[huddo]

After more thought, here's another drawing of the wall/ floor construction.On my drumroom design post there are some db readings for drums and bass as well as some backgrounds. Is it worth building this floor with this wall construction? And what are the general feelings about attenuation through the structure? I'm kinda stuck on this.

[the dreamer]

Huddo, I got the feeling, that your thin wall doesn't match the great performance of the floor and will be the weak link.

I would go for more (4-5?) layers of drywall.
But it depends on your soundproofing needs. Maybe the outer wall and the 2 layers are enough. but then you might not need a floating floor at all.


Yes you build it that way, but you can stop the concrete floor directly below the wall. They will calculate it this way and I see no reason why to build different.


Florian

[huddo]

Your questions are pretty much the same as mine. I don't see the point of making my floating room wall with more layers of drywall, as I can't match this with my doors and windows. Two layers of 16mm drywall will give me STC34. With the 48kg/m3 rockwool dampening this, maybe I'll get up to 37? The only figures I have that are not STC are for the same drywall product but in 13mm.Two layers of this 13mm drywall has TL at 100hz( the lowest frequency they have tested)of 20db,. My sliding glass door to the waiting room/ control room is 10.38 mm thick glass. It has an STC of 33. At 100hz it's TL is about 25(see original plan at top of drumroom design post). I am also interested in the floating floor because of it's vibration control of drums through the structure and control of the lower frequencies. I still don't really know what tl the complete structure will have.

[AVare]

I am also interested in the floating floor because of it's vibration control of drums through the structure and control of the lower frequencies

You show the wall on the floating floor. This causes significant laod imbalances on the floor. Float the walls separate from the floating floor.

Andre

[the dreamer]

I am also interested in the floating floor because of it's vibration control of drums through the structure and control of the lower frequencies

You show the wall on the floating floor. This causes significant laod imbalances on the floor. Float the walls separate from the floating floor.

Andre

Andre, this is the case if you just have a wall on 1 side only, maybe I got it wrong, but I think Huddo wants to build a room in room. No imbalances there and actually better for the liveload/deadload ratio in comparison to the weight of just the floor without walls/ceiling.

Florian

[AVare]

Florian:

Without quite understanding your point, the imblance that I am refering is int he dead weight on the edge of the flloor versus the rest of the floor with no dead weight on teh floor. I hope this helps clear up my point.

Andre

[the dreamer]

I'm also not 100% sure if I got it
What I mean is, that the steel reenforced concrete spreads out the load and the supporting sylomer under the wallarea is calculated to a certain width of stripes/pucks or consisting of another type of Sylomer resulting in a more or less even load distribution over the whole floorarea.

I'm just in the process of checking that out for my CR (Eric helped with that, THANKS!) and at Paul's Bombshelter it's the same.

But I guess I misunderstood something here??
Florian

[the dreamer]

accident

[AVare]

to a certain width of stripes/pucks or consisting of another type of Sylomer resulting in a more or less even load distribution over the whole floorarea.

Understood now. Thanks. But why?

Andre

[the dreamer]

I'm certainly not the pro who can talk in depth on this and maybe it isn't a tremendous advantage.
The greatest advantage I can see is the mentioned deadload/liveload ratio, with an almost non changing natural frequency when there are 4 people in the room or just myself.
FWTW
Florian

[AVare]

Using blunt words, I can see no advantage.

Andre

[Dan Fitzpatrick]

one advantage would be, you don't have to worry about the seal between the wall and floor breaking over time as the floor rises and falls with different loads applied.

it seems simpler to float the whole room as one unit.