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  1. J

    Position of Celotex in cold flat roof.

    Hmm, downlighters are new addition (my sparky seems to like 'em, although I see no one here does!!) looks like I may be setting myself up with a problem. I have realised one end of the roof is actually quite well ventilated, as it opens into a space with quite big soffit vents, so I am coming...
  2. J

    Position of Celotex in cold flat roof.

    Thanks for responses. In answer to last two posts, downlighters are extra low voltage, with 1 transormer / light. They are 90 min fire rated but they are not sealed i.e. they have vent holes in the top. Clearly the downlighter and transformer should not be in contact with the insulation, to...
  3. J

    Position of Celotex in cold flat roof.

    Perhaps I should add, that this is an unplanned (i.e. unbudgeted!) repair job following a small leak. I had considered just patching the plasterboard and leaving original insulation as is. However as the ceiling has been knocked about quite a bit it is become reasonably cost effective to...
  4. J

    Position of Celotex in cold flat roof.

    I have a "cold" flat roof in which we are taking the ceiling down, so want to use the opportunity to renew the very thin original fibre glass insulation. The roof has just been resurfaced, so not an option to fit insulated boards on top. We have fire rated lv downlighters, so my question is...
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