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22mm Thermaline to a ceiling ????

Discussion in 'Plastering and Rendering' started by conks, 29 Mar 2009.

  1. conks

    conks

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    Location:
    Somerset
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    Hi,

    I was thinking about insulating between joists and then fixing standard 12.5mm ceiling board.

    Thing is, as the ceiling height is 2.7m, I was wondering whether I should use 22mm Thermaline instead ?

    Also, if I use Thermaline, would I need a vapour barrier ? (it's a pent roof, so fixing from below on warmside etc.).

    Thanks.
     
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  3. nick13

    nick13

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    Location:
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    A vapour barrier is only necessary when you fixing insulation to flat roofs or to ceiling where the lofts space above has poor or no ventilation. Both of these scenarios will cause interstitial condensation.

    Nick
     
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