Insulation

Discussion in 'Eco Talk' started by fatbloater, Aug 20, 2018.

  1. fatbloater

    fatbloater Member

    I have a suspended floor. I have bought 100mm celotex to insulate. It's a kitchen extension and I will want to run pipes. Can I leave a 50mm gap between insulation and top of joist?
    Thanks
     
  2. retiredsparks

    retiredsparks Well-Known Member

    Many insulation systems rely on creating an air gap.
    In this instance I would contact Celotex and ask advice from the tech dept.
    Rs
     
  3. Bob Rathbone

    Bob Rathbone Well-Known Member

    That would be my solution, leave a gap but ensure that the Celotex is a good fit, no gaps for draughts and supported by battens below.
     
  4. fatbloater

    fatbloater Member

    Thanks. What do I do about the first and last joist that are close to the wall? Very small gap. Wool fill? It would be touching internal wall below dpc
     
  5. Bob Rathbone

    Bob Rathbone Well-Known Member

    Cut Celotex to fill the gap. Vertical DPC against the wall. Don't use wool, it will get damp.
     
  6. fatbloater

    fatbloater Member

Share This Page