Tim Watts wrote:
On 02/06/10 01:09, The Natural Philosopher wrote:
george [dicegeorge] wrote:
Mineral wool for sound insulation is a lot denser than that for heat
insulation,
but heat insulation is so much cheaper as its subsidised,
so i'm planning on using heat insualting mineral wool under the
floorboards but stuffing it in very tightly.

i think this is a good idea, but im not an expert.


First lime of attack is to block any air paths. Yes, there are often air
paths - between shared rooves, or under shared floors.


[g]


Job for expanding foam? Quick, easy and should have some noise dampening
effect as well as blocking the air paths.


not always. Bad for ventilation if there needs to be air movement.