Best way to soundproof a timber floor?

[scott08]

I need to provide some good soundproofing on my newly installed loft floor. The old FF ceiling/ loft floor has been replaced by new joists, 200x50 at 400 centres.

The SE has said I need to glue and screw ply to the joists so I won't be able to float the subfloor. The current plan is to put resilient bars or clips on the underside of the joists, acoustic wool between, glue and screw ply on top, then acoustic boards, then vynil planks. The products i've researched which products to use but there are so many avialable, and I can't seem to figure out what makes a certain product better than another, with nowhere providing testing/ comparison on them. I'm reluctant to reach out to any of the sites for help, as they seem to just push the brand they stock. My questions would be as follows:

1) For the acoustic boards, what product is best? There are many brands and types. Is it better to go with separate boards for airbourne and impact noise, or boards that combine both?

2) Is the build up I suggested above the best method for soundproofing here?

 

[scott08]

Any suggestions on best products here?

 

[JohnD]

You can muffle airborne sound by packing between the joists with mineral wool. The effectiveness is proportional to weight, so the sound version is heavier than loft thermal insulation.

Cavity wall batts are cheaper and readily available so worth considering.

For the greatest difference, an extra layer of plasterboard and skim on the ceiling below. I formerly had an Edwardian house with lime L&P ceilings which are very thick and heavy. When one came down and was restored the difference was enormous. You can get a noise version of plasterboard which I have not used but I believe it is thicker and heavier.

Obviously, do not have holes for downlighters or anything. You can seal minor gaps with expanding fire foam.

Carpet and dense felt underlay.

 

[Notch7]

I need to provide some good soundproofing on my newly installed loft floor

it would be most helpful if you explained why you need to soundproof

 

[scott08]

it would be most helpful if you explained why you need to soundproof

The house is going to be split into flats, so want/ need to minimise sound as much as possible. Sound proofing to building regs is pretty minimal, so I want to go quite a bit beyond this as I will still be living in the property.

 

[Notch7]

The house is going to be split into flats, so want/ need to minimise sound as much as possible. Sound proofing to building regs is pretty minimal, so I want to go quite a bit beyond this as I will still be living in the property.

Ah ok, I understand now

carpet on the floors and not laminate would be my suggestion