John Sayers' Recording Studio Design Forum Archive

Hello,

I am building my studio and I have a double leaf with a floating floor.
I have the interior leaf built on the concrete floating floor and the second leaf is the exterior wall built on the "existing" floor.
The interior leaf is made of two drywall panel glued together with a total thickness of 3cm
I am deciding about the doors.
I have two door, one for each leaf.
The two doors manufacturers I am considering have the following specification:
First manufacturer: 31 db RW
Second manufacturer: 42db RW

The second door type is obviously more expensive.
Do you think is worth to spend for the second model considering I will have two doors completely decoupled?

Thanks.

The interior leaf is made of two drywall panel glued together with a total thickness of 3cm

You should never glue drywall panels together. It reduces your isolation. To find out why, take a look at the Wyle report, from 1973.

The second door type is obviously more expensive.
Do you think is worth to spend for the second model considering I will have two doors completely decoupled?

What is the isolation of your wall system, and your floor system? What does the manufacturer of your doors claim for the total isolation offered by a pair of those doors in the configuration you will be using? Whichever total isolation is closest to the isolation of your existing structure, is what you should get.

- Stuart -

Thanks for the answer

Soundman2020 wrote:

The interior leaf is made of two drywall panel glued together with a total thickness of 3cm

You should never glue drywall panels together. It reduces your isolation. To find out why, take a look at the Wyle report, from 1973.

I can not find the Wyle report on the internet, do you have a link?
In Italy I can not find drywall thicker than 15mm, How can I achieve more than 15mm?
Is Greenglue not okay for this job?

Soundman2020 wrote:

The second door type is obviously more expensive.
Do you think is worth to spend for the second model considering I will have two doors completely decoupled?

What is the isolation of your wall system, and your floor system? What does the manufacturer of your doors claim for the total isolation offered by a pair of those doors in the configuration you will be using? Whichever total isolation is closest to the isolation of your existing structure, is what you should get.

I do not have any data about the isolation of my concrete floor and wall system. The concrete floor is 85mm thick and built on EAFM Mason mounts. Regarding the wall, I have not built yet the interior leaf and the exterior leaf is not equal for all the walls but I added a layer of drywall to all the walls in order to reinforce them
Thanks.

In Italy I can not find drywall thicker than 15mm, How can I achieve more than 15mm?

15mm is fine. To get more, then you just add a second layer over the first layer. If you need even more, then you can add a third layer.

Is Greenglue not okay for this job?

Green Glue is not actually glue! I wish they would have chosen another name... you cannot use it to stick things together. That's not what it is meant for. It provides acoustic damping between the layers, but does not stick them together. You still have to nail the second layer into the studs, through the first layer.

The concrete floor is 85mm thick and built on EAFM Mason mounts.

Great!

- Stuart -