Sound proofing a floor

[Mark Stephens]

Hi,

We are about to move into a house (around 300 years old) where one bedroom overhangs the lounge of the house next door by about 1 1/2 metres.

Previously, there was nothing in the roof space between the plasterboard ceiling and (rotten) floorboards.

I had 2 main concerns: fire resistance and sound proofing.

After speaking to an architect, I placed a double layer of plasterboard in the gap and then filled and sealed this with between 5ml and 15ml of plaster.

Now, this has done a reasonable job of cutting out the worst of the noise and I am a lot more confident a fire would not now simply come straight through.

However, there is still sound coming through and I wonder if there is realistically anything worth doing in the maybe 2" gap I have left to play with? (I am next going to replace the floorboards and we will be carpeting the room).

Thanks.

Mark Stephens

[the_constructor]

Just a thought. Could you not use something on the lines of what they put in speaker cabinets ..... ?

[Mark Stephens]

Like high density foam?

[Handy]

If you haven't done so already it would be worth googling for soundproofing and acoustic insulation.

[malc]

The fibrous insulation that you use under laminate flooring might work. It's about 1 cm thick and fairly dense and the packs we used said they could deaden sound. Or this stuff