Sound Insulation - Ceilings/Floors

[atlasfever]

Hello,

Could I get some advice on the following:

Issue: Soundproofing between my flat and the one above.
Notes: I'm in a 1st Floor, Georgian flat, and the freeholder owns the flat above. In contract, he agreed to soundproof the flat above.
Assume: I have a plasterboard ceiling which is affixed to remnant lathe/plaster ceiling. It's presentable enough. However, had copied the cornice to re-instate like for like as the cornice was cracked and falling to bits, so there is a 3/4 foot empty area around the plasterboard.

Question:
I spoke with a sound insulation specialist who said that if I have a lathe/plaster ceiling, then do not put a resilient bar system as it's no better.
The freeholder will lay acoustilay and mineral wool from above, but he cuts corners at every turn, so likely to only do main rooms, but will never do bathrooms nor under kitchen appliances. Not trustworthy. He would likely do an ok job of just re-fixing/tightening the old oak floorboards above.

So, any feedback on what would be a good idea? The plan was to extend the current plasterboard to the wall edge, and then add back the cornice, but I'm not sure if the sound insulation will be good. Especially if that mineral wool will not be added.

Anyway: Any feedback on sound insulation of a ceiling would be great. Thanks.

 

[worms]

My understanding was that sound insulation was always best done on the side which is the source of the noise.

 

[Lime]

My understanding was that sound insulation was always best done on the side which is the source of the noise.

Agreed.

I suggest vermiculite under upstairs floor.
Easy to pour in and spread, a good all-round insulator to sound and heat.

 

[LadyArowana]

We were required to put "accoustic underlay" beneath our floorboards when we renovated the apartment. It's an Edwardian mansion block, solid floors and the lease conditions stipulate carpet but we are owner managed and a lot of people have wanted to have non carpet finishes so it gets allowed with that condition. Our downstairs neighbour had no objection probably because we are not usually there, and even when we are we never wear shoes indoors. However rooms where there are pipes, kitchen and bathrooms, seem to get quite a bit of transmitted noise as I can hear things from downstairs, even when I don't have my ear to a glass resting on the floor :lol: