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Recent content by John86

  1. J

    Insulation Air Gap for Pitched Roof

    Yes, I believe it is a raised collar roof. There's minimal gap by the eaves, and the rafters almost sit flush to the top plate, so minimal airflow. Therefore, that's why I'm thinking I need maximum gap within the rafters, between roof and PIR, to prevent condensation buildup and any moisture if...
  2. J

    Insulation Air Gap for Pitched Roof

    The membrane has been pulled taught with no drape, but you can fit your fingers in-between where the membrane overlaps, so there's some airflow. Thanks, John
  3. J

    Insulation Air Gap for Pitched Roof

    Hi, about to have a DIY meltdown with my 1890 terrace house. New slate roof with vented ridge and breathable membrane installed. 50mm PIR between rafters on the pitched roof that enters the bedrooms, and then 50mm insulation plasterboard installed. Has all been plastered and decorated. However...
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