EPS board for floor build up for UFH

EPS board for floor build up for UFH

EPS board for floor build up for UFH

I am looking to back fill a floor ready for UFH. Currently the floor is suspended, removing this will leave a 400mm gap to back fill. There is a dry concrete slab at the base in good condition. Typically it looks like I should do the following:

Hardcore
Sand
DPM
Concrete Slab
Insulation
UFH Pipes
Screed


Could I backfill with just EPS100 at around 300mm + DPM + pipes + Screed?

by Male2981

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