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:
Best Answer
I don't know why you would've been advised to glue or lock a floating floor down. This a very bad idea & could make the floor cup or ridge if the floor can't move. Parquet is very different in being extremely small pieces with extremely small omnidirectional movement in a whole lot of very small areas.
Having no underlayment is the typical way & allows any moisture from condensation to escape, radiant floor's secondary activity. Foremost, is abiding by the Flooring Manufacturer's written instructions & approvals (over the phone means nothing) above & beyond whatever I or anyone else tells you. Do what the Warrantor says & even file pictures away to back up your by-the-book professional installation.