Please review my solutions so far

[whatalob]

Hello all

I have been consulting this forum on and off for a few months now and I now have a reached an advanced stage of research but still with a multitude of questions in the air. I will not post them all at once but distribute them accordingly to the relevant sections.

A few things about the space:
On the 4th floor of an 8 floor old semi-industrial building built in the 60s. On the floor below there is clothe-making machinery that makes some hardcore bass vibrations. Existing walls are relatively thick (app 30cm) by brick and cement.

My most important issues are the following:

-Layout:

Compared to most designs I have seen on here, I have a feeling that I have come up with a pretty unorthodox layout, which can be seen in the attached (2D only – sorry) diagram. All inner walls don’t actually exist yet, but the reason I put them there is that they coincide with existing pillars (right word?) I am considered with the very narrow recording room as well as the fact that in the control room the speaker placement is on the “width” side rather than the length (i.e. on the shorter one). Is this totally wrong? Please note that one the far right wall are two large windows not depicted. Could someone please comment on this layout?

-Sound insulation:

Regarding the insulation a proposed solution that I have been offered is as such: A room within a room is to be built on a metal framework that will cover existing walls and ceiling with a leaf consisting of two gypsum boards and 150kg rockwool (called rock-cotton in greek but I assume is the same)
The new walls will be the same plus an extra layer of gypsum board. (this doesn’t sound too right. Isn’t the one leaf too thin?)

The floor is to be floated again on the same weight rockwool and a layer of cement.

Regarding doors someone suggested that for the live room door I could use two “patio type” glass doors. Is that effective? Should I opt for the hollow core-mdf solution proposed here instead?

For windows is a normal (not acoustically sealed) triple glaze window with different glass distances sufficient? Would it be worth adding a second outer normal cheap window?

On the HVAC front I have found special and very pricy solutions for A/C that use sound traps, absorbers etc. This is of course very pricy and does not provide ventilation, but could subject to budget be installed in the live room. The assumption is of course that enough fresh air will be in the live room and that opening the doors is enough to renew it.
That means that ventilation is to be installed in the control room but I ‘m still not clear on how this will affect the sound insulation.

Ok I ‘ll leave it here for now.

Many thanks

S.P