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

whatever brand you find in the nearest skip.