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PostPosted: Tue Jan 16, 2018 6:56 pm 
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Hi,
We have the choice of a concrete floor (Celotex type insulation boards and then concrete) or a floating floor (Level layer of concrete then celotex boards and then 22mm OSB boards) on top of the insulation in our extension - which would you recommend?
many thanks


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PostPosted: Tue Jan 23, 2018 8:35 am 
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Morton wrote:
Hi,
We have the choice of a concrete floor (Celotex type insulation boards and then concrete) or a floating floor (Level layer of concrete then celotex boards and then 22mm OSB boards) on top of the insulation in our extension - which would you recommend?
many thanks


You also need to consider what form of heating your extension is to have.
With a concrete constructed floor slab, it is normal to have a structural slab initially with mesh reinforcement.
Followed by Celotex insulation layer.
Then with a 75mm sand/cement screed over this.
If you had decided on under-floor heating, this would have been laid before the screed and subsequently have been contained within it.
I am unable to think of any advantages gained from using an OSB floating system?

Davyp1



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PostPosted: Wed Jan 24, 2018 9:44 am 
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Just an afterthought!
With s floor screed you do have a wet cementatious floor which requires to be cured for up to three weeks prior to the underfloor heating being used. Although this can vary depending on the product used.

A floating OSB Floor would have the advantage of not needing a drying period! But it would still require radiant heating for the room.


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