I have been offered a grout which when applied to a wall in a 1cm coat, is equivalent to 3cm of foam insulaton. (Used to insulate houses.)
Does anyone have any experience with such a material? is it worth using? or is it a waste of money?
I don't know what the brand name in the UK is, here (Turkey) they sell it as "izofull". It comes in different grades, 1-3, 3-6 and 6-8mm. Lambda value 0.031w/m2K.
TIA for your help