SilasPaul, December 19, 2019 in Q&A
Look at Roof Structure in the roof defaults.
When I build roof planes, other than the auto generated roof types - to have the changes or structural sizes become visible or effective - I use the 'Rebuild 3D' button - see pic;
Thanks for your tips. My mistake was that I set in the room settings "Use Soffit Surface for Ceiling".
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