@ dorin thank you very much for your work !!
I tried to build a roof with the templates but it doesn't look nice.
https://www.mediafire.com/view/gvzdu3kp ... 6.jpg/file

Supporting walls or the right wall heights have created (screenshot 2022-11-13). Or do you mean something different ?
Try to create new walls with a sheet again today.
To create the roof, I don't find a solution at the moment even though you have explained it very well.
But probably the creation of the roof exceeds my skills !!

Regards Klaus