Sorry I ahvent' been abck for a while. This forum onyl sesm to be working at some times fo the day - bizarre?
Hendrik wrote:Wow!!!
Thank you very much Paul. Now I understand it and know how to built this Floating Floor.... Building the Walls on the Floating floor is a good point. Sometimes I think to complicated...
But I have 2 other Question...
:
1. Is a 15 cm Concrete on the sylomer enough? I know I have to calculate the load to choose the right sylomer, but is it enough to build everything up (Walls etc.)?
Yes. More the better really. I used a 125mm (12.5cm )slab on the sylomer.
2. How did you realise the contact between the walls and the ceiling, or did you build up the ceiling on the wall frame?
The WHOLE ROOM floats on the concrete slab, so the ceiling joists simply rest on the stud walls ( atatched with truss clips and very long screws )
3. (perhaps Steve?) My building is a standard "Brick House" which means that I have a Brick - Insulation - Clay brick System as the Outer Walls.
Now, when I build up the inner walls (only these ones which stands parallel to the outer Brick), I have a 3 Mass System. Or not? How can I handle this?
Thanks that you help me.
Regards
Hendrik
Hendrik, the left wall of my garage is teh wall of the house. It is, like you place, a double leaf wall - Brick - air blocks. Even though this section is 3 leaf, it's still VERY SOUNDPROOFED. But then I'm using 6 layers of 12.5mm drywall and 1 layer of 18mm MDF on my inner room walls and ceilings.
Here's a description of my floor system from Soil upwards.....
1] 100mm Hardcore
2] 10mm blinding sand
3] DPM ( damp proof membrane )
4] 70mm Celotex Floor insulation
5] DPM
6] 150mm Concrete oversite base - Fibre Mesh mix. NO steel reinforcing
7] 50mm high Sylomer blocks- 50m air gap filled with 45kg/m3 Rockwool
8] 18mm PLywood formwork
9]125mm Floating concrete Slab - Fibre Mesh mix with steel reinforcement
Calculated to about 9 to 10Hz - POssibtyl even lower in practise as I've added some more weight to the design since then.
When you calcualte the weight for the sylomer, you MUST also include the walls and ceiling, and any other heavy items that will be in the studio.
In practise this means the edges of the floating floor will be more densely populated with sylomer, as of course the extra loads due to ceilng and walls are on the edges.
To do this I divided the floor up in to ZONES. Each wall footprint was a zone, and the main usable floor area was another zone.
Roughly the main flor area had 80mm x 82mm sylomer blocks on a 550mm grid. The wall zones had 60mm x 125mm sylomer blocks spaced about 200mm apart
If you look at my studio build diary
http://forum.studiotips.com/viewforum.php?f=1( can't rememebr which page ) you can see piccies of how I laid out the blocks, and how I spent a lot of time getting the heights of each block as close to being the same as possible. Otherwise the load on each block will be different and the floor won't work so well.
hth
Paul