Floor insulation

[Russell griffiths]

Morning, my floor buildup, consists of block and beam with 200 mm of eps on top with a concrete cover, 

if I want to lower my floor height, what can I change the 200mm of eps for that will give a good insulation value. 

Dont ask me what type of u value I’m after as my head is spinning, dealing with an architect who is stuck in 1960,s

im looking to build a good house above any current regs but not trying to be passive by any means. 

Cheers russ. 

[dpmiller]

150 PIR would be equivalent, no?

[Russell griffiths]

You can remove this mods please as I seem to have asked this question already 

 

told you my my head was spinning. ?