Sound insulation between floors

partan

Currently having a 2 story extension built, ground floor is kitchen/diner/utility/wc, first floor is bedroom/wc/dressing room.

We have the floor down for the first floor, and the builder suggested putting insulation under before we put up the plasterboard for the ground floor ceiling, for sound insulation.

I mentioned this to the joiner, and he questioned whether it was necessary.

I dont know. does anyone have any experience of this? it would be relatively inexpensive to do if we use glass wool, but is there likely to be any benefit at all? Or is there a better product to use?

cheers for any help

diable

If you are that worried then put in an acoustic floor.

docmatt

partan wrote: »

Currently having a 2 story extension built, ground floor is kitchen/diner/utility/wc, first floor is bedroom/wc/dressing room.

We have the floor down for the first floor, and the builder suggested putting insulation under before we put up the plasterboard for the ground floor ceiling, for sound insulation.

I mentioned this to the joiner, and he questioned whether it was necessary.

I dont know. does anyone have any experience of this? it would be relatively inexpensive to do if we use glass wool, but is there likely to be any benefit at all? Or is there a better product to use?

cheers for any help

Yes, not only will it help dampen the noise, it will keep you much warmer downstairs. I'm building my house and lagged all my ceilings with glass fibre.

Cheapest atm is Wickes £10.66 a roll

http://www.wickes.co.uk/loft-roll-insulation/invt/161209/

partan

nah, not worried, diable. to be honest i wouldnt have even considered it had it not been suggested to me. but now its been mentioned, its got me thinking.....

partan

cheers docmatt, good price too

iamcornholio

partan wrote: »

..... the builder suggested

..... the joiner ... questioned whether it was necessary.

A bit of a fail by both of these

It should not be a matter of a suggestion or a question, but rather the building regulations require it!

You need 100mm of Rockwool or similar for acoustic insulation, not the other type for heat insulation

Edit ... just noticed this job is in Scotland, so check the regs for up there

partan

iamcornholio wrote: »

A bit of a fail by both of these

It should not be a matter of a suggestion or a question, but rather the building regulations require it!

You need 100mm of Rockwool or similar for acoustic insulation, not the other type for heat insulation

Edit ... just noticed this job is in Scotland, so check the regs for up there

yeah, apparently its not required for regs here. think we'll just stick it in anyways. it doesnt cost much, so may as well.
the rest of the house doesnt have any either, but it's 110 years old and has the old lath & plaster ceilings, so i suppose thats a more effective sound barrier than plasterboard.

Doozergirl

iamcornholio wrote: »

A bit of a fail by both of these

It should not be a matter of a suggestion or a question, but rather the building regulations require it!

You need 100mm of Rockwool or similar for acoustic insulation, not the other type for heat insulation

Edit ... just noticed this job is in Scotland, so check the regs for up there

Yes, I would have said the same. It's required down here, so if you're doing it up there and it's generally colder, I'd do it...

amicolley

Hi does anyone have any suggestions for sound insulation in an old building with wooden floors and lathe plaster ceilings?

LoMax

amicolley wrote: »

Hi does anyone have any suggestions for sound insulation in an old building with wooden floors and lathe plaster ceilings?

Hi amicolley,

I work in this field. What are you trying to achieve?

LoMax

partan wrote: »

Currently having a 2 story extension built, ground floor is kitchen/diner/utility/wc, first floor is bedroom/wc/dressing room.

We have the floor down for the first floor, and the builder suggested putting insulation under before we put up the plasterboard for the ground floor ceiling, for sound insulation.

I mentioned this to the joiner, and he questioned whether it was necessary.

I dont know. does anyone have any experience of this? it would be relatively inexpensive to do if we use glass wool, but is there likely to be any benefit at all? Or is there a better product to use?

cheers for any help

No sure about the Scottish Building Regs but are usually similar to Eng and Wales which would mean that internal partitions/floors need to achieve 40 dB Rw however do not require testing to comply. Normally this is signed off by your building control officer based on the construction. I would personally recommend putting is some sound absorption as you dont want to hear the dishwasher/washing m/c running at night when you are trying to sleep upstairs.

HTH