I have recently purchased an engineered wood floor and wish to install this over underfloor heating (A Nu-Heat water based solution which sits between the joists). The joists are currently covered with a thin layer of plywood and my plan is to install on top of this. I have been advised not to float the floor but cannot find a suitable underlay alternative to use.
I have spotted the Elastilon Lock product as a double sided adhesive underlay allowing me to fully bond the floor to the plywood layer - but its website description suggests it only allows for minimal tolerances (presumably in expansion/contraction) and is aimed at parquet style floors.
Would this be suitable for a standard plank engineered wood flooring, or could you suggest an alternative?
For reference the floor I have purchased is
And Elastilon Lock website: