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Radon\plastic membrane on top of Celotex

Discussion in 'Building' started by shabbaranks, 28 Jan 2021.

  1. shabbaranks

    shabbaranks

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    Hi,

    Currently working on a rear extension which was previously a conservatory slab base. Scrabbling the top I discovered it had 130mm of Celotex in which is good stuff. As part of the building regs we need a radon barrier - Im pretty sure there is\was a plastic barrier put in when the cowboys out the slab in for the conservatory but in case there isn't am I ok just to place it on top of the Celotex which will then have a cement screed over the top?

    As I understand it this will be formed correctly between the wall cavity also.

    Thanks
     
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  3. ^woody^

    ^woody^

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    As long as the barrier is continuous across the walls too.
     
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