F
Flintstone
Why no Hardie backer. Is it because you've read it somewhere as well or actually know why? If hardie is installed on to screed with flexi addy then flexi addy used above then why not if aloud on top of a timber floor with ply.
You have just made the statement that it can’t be used and now you are suggesting it can be.
Nmp say you can and hardie say you cannot. There’s no point using either on a solid floor anyway when insulation board it better easier and cheaper