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