Thin acoustic layer

[Battor]

Hi,
I am renovating a terraced London house. The space is a premium and I cannot take inches. I can't add 10cm and I just want a little extra sound proofing on party walls.

I looked at thin Mass loaded vinyl (MLV), which comes in 2-4mm or Tecsound (2.5mm for 25.2dB)

But I would need to paint the surface so I'm looking at the thinest surface I could have over the acoustic membrane.
An additional acoustic plasterboard would have been nice, but I cannot find anything thiner than 12mm. I would ideally like to have some 5mm panels, to achieve a total thickness of 10mm or less.

Would you have some suggestions for that paintable plasterboard or equivalent?

 

[sircerebus666]

How do you intend to fix the plasterboard to the wall?

I can't believe that space is that tight on a party wall that a max 16mm extra thickness is going to make that much difference

 

[endecotp]

There is no magic solution; you won’t get thinner than this:

https://www.soundstop.co.uk/soundproofing/soundproofing-walls/Tecsound-wall-solution6.php

 

[Battor]

For some reasons our architect specified 5mm isolation, but I am struggling to find what he meant as a surface that can be painted. The architect in question isn't anymore, hence I am looking for the "thing" on my own.

Just to give an order of magnitude, 10mm thickness on both sides of a 25m-long house, over 3 floors (25m, 20m, 10m), is about 100m of walls, so that is a 10sqf / 1sqm. At the price of 1 sqm in central London, it's worthy to look at a solution that does save 1sqm, even if it cost much more.
Reference:
https://www.ons.gov.uk/peoplepopula...chdoesonesquaremetrecostinyourarea/2017-10-11

https://primeresi.com/wp-content/uploads/2017/08/psm-e1453835044418.png

 

[endecotp]

I have wondered whether removing the existing plaster to make space for an extra ~20mm of insulation (thermal or acoustic) would ever make sense.

 

[sircerebus666]

For some reasons our architect specified 5mm isolation, but I am struggling to find what he meant as a surface that can be painted. The architect in question isn't anymore, hence I am looking for the "thing" on my own.

Just to give an order of magnitude, 10mm thickness on both sides of a 25m-long house, over 3 floors (25m, 20m, 10m), is about 100m of walls, so that is a 10sqf / 1sqm. At the price of 1 sqm in central London, it's worthy to look at a solution that does save 1sqm, even if it cost much more.
Reference:
https://www.ons.gov.uk/peoplepopula...chdoesonesquaremetrecostinyourarea/2017-10-11

https://primeresi.com/wp-content/uploads/2017/08/psm-e1453835044418.png

If you are that terrified about losing 1sqm then simply don't put the sound proofing in

Although your maths baffles me you would only be losing 10mm off two sides of a room , if you really think that will make a massive difference to the resale value of your home then you know what not to do

 

[Battor]

Endecotp, very good point!
The labour maybe massive to bring to raw while at the same time making the surface smooth to appose the acoustic membrane efficiently.

sircerebus666 and others: yes, that's the dilemma (importance of proofing -vs- impact on habitability and value).
I was just querying whether I had missed anything in the construction material.

Many thanks