Tim Lamb wrote:

We don't yet know if the underfloor heating pipes are retained in EPS with
no overboarding other than the laminate. Bert might be able to discover
this by looking elsewhere. Threshold strip?

The system used is by Maincor:

http://www.maincor.co.uk/underfloor-...overboard-ufh/

As far as I recall, all that's between the moulded boards which hold the
pipework and the laminate is a fairly thin underlay (a type recommended by
the laminate supplier).