joists - editing floor on/off

If I create ‘joists’ :floor-joist-tool: with a floor above and ceiling below, I cannot subsequently remove floor or ceiling by either unticking ‘include floor’ or by setting the material to ‘none’ (or both).
John

Hi John,

Please see this tutorial at the link below.

youtube.com/watch?v=vPDdr3S … e=youtu.be

Kind Regards
Dean