On Friday, 31 July 2020 08:20:34 UTC+1, Tricky Dicky wrote:
As part of the kitchen refurbishment I am looking to insulate the floor which at present is a suspended T&G floor on 100mm joists. I am looking at fixing 25 X 25 battens to the bottom of the joists and dropping 75mm foam insulation in between the joists. Any advice regards preferences between Kingspan or Celutex or is it just a case of whichever I can get at the best price?

Richard

An important thing to remember is not to "insulate" any wiring that carries significant current. (Ring main, cooker, immersion heater etc.) You might have to move it.

Wiring can overheat, especially in a loft where the ambient temperature can get quite high.