Insulation between ground and first floor?

Greg - at the front of the house - the old part its around 700mm and then goes to 300mm...in some places in the new subfloor its 200mm.

I did ask the question to the builder about insulating in between floors and he said theres not point as the ceiling downstairs needs to be replastered and it will fall through...good point I dodnt think of.

cheers

Cobber

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Originally Posted by thebuildingsurv

foil will help a bit especially with drafts. Foam board to the underside of the flooring can also help.

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I would go the way of the foam board as it will be easier to install and if you had a fire in the house the last bit thats going to burn will be the floor on the bottom story unless you have kids playing under the house with matches.

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Originally Posted by Cobber

Greg - at the front of the house - the old part its around 700mm and then goes to 300mm...in some places in the new subfloor its 200mm.

I did ask the question to the builder about insulating in between floors and he said theres not point as the ceiling downstairs needs to be replastered and it will fall through...good point I dodnt think of.

cheers

Cobber

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Yes but there's nothing stopping him from putting the insulation in as it's being replastered. Sounds to me he just doesn't want to do it. It would be an extra that he could charge you for and make a bucket out of.

Cobber, It is the floor in between the ground and first floor you're asking about isn't it??

Thermal insulation - this would not really be needed unless you really kept one storey at a different temperature to the other.

Sound insulation - for general noise then increase the mass of the ceiling eg two layers of plasterboard and use rockwool batts, for impact sounds from footsteps then use isolated mounts for rondo furring channels - they really help.

Cheers
Pulse

Oh, maybe I am barking up the wrong tree here...

My posts were made on the assumption that you were talking about the floor suspended above the ground (i.e.: soil ).

There is no benefit to thermal insulation between stories in a house as the stairwell alone would undo any benefit, and the difference in temperatures across occupied levels would not warrant any effort in this regard.

Greg

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Originally Posted by gregoryq

Oh, maybe I am barking up the wrong tree here...

My posts were made on the assumption that you were talking about the floor suspended above the ground (i.e.: soil ).

There is no benefit to thermal insulation between stories in a house as the stairwell alone would undo any benefit, and the difference in temperatures across occupied levels would not warrant any effort in this regard.

Greg

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Actualy I think he is talking about both floors. The ground floor for thermal insulation and the first floor for acoustic insulation.

Thanks everyone. Bazza is right I started off talking about in between the ground and first floor and also spoke about the ground floor (under the house).

cheers

Cobber