Sound insulation slab under timber floor

[Possom]

I know if putting in underfloor insulation for heat-loss purposes, then some form of netting must be attached to hold the insulation up to the timber floor and still permit the travel of air between the joists.

However, if putting in 5 cm thick sound insulation slab (not for heat-loss purposes) under timber flooring, where the joists are 20 cm deep, can the slab be simply set down to the bottom of the joist without the need for any netting? Presumably air flow will still be permitted over the top of the slab?

This would be under the floor of the 1st floor.

Thanks.

 

[KenGMac]

Possom, good evening.

Must admit I am slightly confused? i assume you are considering introducing Sound Insulation on a suspended timber first floor room or rooms?

Suggest you have a look at "Quietex" on google, that site will give you loads of information on how to achieve Sound Reduction between vertically spaced rooms.

Retro - fitting Sound Insulation requires the removal of the flooring to be achieved successfully

As for air flow, this is very limited within a first floor if indeed at all??

Ken

 

[Possom]

i assume you are considering introducing Sound Insulation on a suspended timber first floor room or rooms?

Suggest you have a look at "Quietex" on google, that site will give you loads of information on how to achieve Sound Reduction between vertically spaced rooms.

That's correct, I'll have a look for that. The sound insulation slab would be tight to the plasterboard ceiling of the room below.

Retro - fitting Sound Insulation requires the removal of the flooring to be achieved successfully

I'm to have the timber floor replaced with a new timber floor, which is why I considered this.

As for air flow, this is very limited within a first floor if indeed at all??

Okay, thanks for this.