Soundproofing bedroom wall

Question

We live in an old pair of cottages divided by a brick wall and plasterboard both sides. We can literally hear each other (neighbours) through the wall. 
It seems to me like there is a gap between brick and the plasterboard (hollow when knocking) and I'm just wondering if that's not making the sound louder.
We are expecting a baby and we wanted to soundproof the wall. I wondered if some soundproofing wool and plaster could do the job (not 100% but at least not to wake them each time baby makes a sound). 
Also, would we have to remove the existing plaster and fill in the cavity with wool (between existing plasterboard and brickwall) and cover with plaster or would it be ok just to cover existing plasterwall with wool then plaster adding few centimetres? 
I would be grateful for your advice.

Neil · Accepted Answer

Hi there 

We are Trowel Team Plus plastering and damp solutions, we also apply soundproofing for all properties, wool insulation to cavities would not be required also plaster removal would also not be a requirement, we would recommend adding soundproofing plasterboards throughout sectional walls also 2 coat plaster throughout, this would reduce the noise dramatically, feel free to contact me if you require any further advice.

Thanks 

Kind regards 
Neil
Trowel Team Plus

Gino · Answer

I would suggest insulation and double board and skim

Rob · Answer

Hi Aga

There are a range of soundproofing plasterboard that can be affixed to the existing plasterboard wall.
These vary in thickness and sound deadening properties.
It may be that the plasterboard wall isn't well insulated if a tall.
There should be a gap between the brickwork and the plasterboard stud wall to stop the transfer of damp and allow air flow.
But it sounds like there should be a layer of osb board then insulation then plasterboard this gives you a thick barrier that should stop everyday sounds.
Hope this helps

Keith · Answer

The best solution would be to add some studding, soundproofing wool and a layer of soundproofing plasterboard.

Edmond · Answer

Need to remove the lining of the wall first then insulation and reinstall the wall again with 2 soundproof boards

Jamie · Answer

The best way to soundproof a stud wall in a bedroom is to increase the wall's density and create separation. These solutions combine acoustic insulation, soundbreaker bars and soundproofing panels that will help you achieve this.

Soundproofing bedroom wall

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