Soundproofing between ground and 1st floor.

Quack13

We are just getting ready for slabbing on our timber frame build.
We intend on putting some sort of insulating material in between the joists on ground floor ceiling so as to give us some sort of way of minimising noise passing between floors.

I know Knauf do a product called Rocksilk although I think it might be a solid panel where as we needed something a bit more flexible to get in around the eco joists and wires/pipes etc.

I was also looking at this spray foam insulation from Rodstown:
http://www.rodstowninsulation.com/spray-foam.aspx?gclid=CJmiqezfg6ACFV1d4wodGhqalA


Does anyone know anything about these products or can anyone make any suggestions as to what might do the job for us.

A guy also said to me carpet with good underlay was something I should look at it when flooring out upstairs.

Has anyone here done something similar themselves, what products did you use and how did you get on?

DOCARCH

I often specify this system:

http://www.british-gypsum.com/systems/system_selector/gypfloor_silent.aspx

Trick enough (fiddly) to install but works pretty well and makes a noticable difference.

Quack13

Cheers Docarch.
It looks like a good product.

Though it seems like its easier to install when the floor isn't down yet and I don't really fancy ripping up all the floors upstairs.

DOCARCH

Quack13 wrote: »

Cheers Docarch.
It looks like a good product.

Though it seems like its easier to install when the floor isn't down yet and I don't really fancy ripping up all the floors upstairs.

Oh - didn't pick up that bit! Yes, sorry, really does need to be installed before putting down the floor.

paddy147

sheets of cork board.Perfect for sound insulation.

Quack13

Yeah I have heard mixed things about corkboard.

Someone told me it did an ok job, someone else told me it wasn't worth a damn!

Have you used it yourself Paddy?
What sort of cost is it?

justflow1983

Fermacell also makes a number of sound control layers for floors
http://www.fermacell.co.uk/pdfs/flooring_1001.PDF

Quack13

Has anyone used this Sealection 500 from Rodstown in a similar manner?
If so I would be interested to hear how effective you found it.

gman2k

Quack13 wrote: »

Has anyone used this Sealection 500 from Rodstown in a similar manner?
If so I would be interested to hear how effective you found it.

This will not be a suitable solution for sound proofing between flooring. it will not have adequate density to attenuate airborne sound transmission

There is (in my opinion) only one suitable product for the ecojoist type flooring construction in timber frame housing and that it loose fill (pumped in) Rockwool.
However, timber frame houses have their flooring dropped in during initial construction with 20mm OSB flooring already in place.
To get Rockwool pumped in, you would need to have your ceilings slabbed at groundfloor, and then remove or cut strips (at first floor level) of your OSB flooring to allow the ceilings to be pumped.
If you have downlights, this creates difficulties, but you can box out the DL positions in 300mm square plasterboard boxes from below before slabbing.
I would also advise to double slab the ceilings below, preferably with one layer 15mm Pink board. Overlap the boards so edges are not over each other.
Also, ensure your plasterer uses plastering tape for jointing slabs and not scrim tape.
You can find a list of approved Rockwool contractors on the Rockwool website.

gman2k

paddy147 wrote: »

sheets of cork board.Perfect for sound insulation.

Will only help to attenuate direct transmission of impact sound - i.e. somebody walking on timber floor at first floor level.
It will do nothing to prevent airborne sound transmission, i.e. people talking, TV etc etc.

gears

Here's another option which can be put down on top of a first floor. Clicky