.

Furthermore, can you walk on Celotex?

you will be able to walk on the single layer over the celotex I just meant the celotex wouldn't take your weight whilst the installation was going on.

Similarly, how do you spell Celotex? Celotex. A trademark for a building board that is employed as insulation or paneling. "Celotex." YourDictionary.

Hereof, is Celotex a Vapour barrier?

Insulation vapour barrier instructions Extruded polystyrene (XPS) has good vapour resistance, while most other insulation boards (polyurethane et al) have aluminium facings which make them impermeable. I use Celotex or Kingspan insulation boards which are foil faced, and then I cover them with separate plasterboard.

What is the difference between Celotex and Kingspan?

Kingspan and Celotex are essentially the same thing. If you can't get 45mm, then 50mm will be better. You need to provide 135mm. How you fit that between or beneath won't matter, so shop around and get the maximum thickness between (Leave 50mm above airgap) and then you have less reduction inside the hall.