I've been trawling the Kingspan site to try and find hard facts about
using Kingspan panels under concrete slab bases. Specifically I've
been trying to find figures for what load various grades will take and
what compression can be expected by the static load. But their site is
a technical desert, masses of glitzy stuff for shareholders and very
very little 'nuts and bolts' hard facts. Can't find a single data
sheet on any product ! What grades and what thicknesses will meet the
0.25 w/deg C/ M requirement of the building regs (as I understand it)
Any pointers?

AWEM