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Non breathable foil type stuff under tiles on porch roof?

Discussion in 'Roofing and Guttering' started by Ian H, 2 Mar 2019.

  1. Ian H

    Ian H

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    Is there any reason I shouldn’t use some foil/bubble wrap/foil/bubble wrap/foil stuff instead of a breathable membrane under the tiles on a porch roof?

    The rafters are 6x2 with 100mm Celotex between them and 25mm under them. Tiles are a Marley double Roman. The porch will have a small radiator and is about 2.5 x 1.2 mtrs in size.

    I’m wondering if it might attract damp more than a proper membrane.
     
  2. ^woody^

    ^woody^

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    No
     
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  3. DIYnot Local

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