incorrect surface construction

[daaninone]

Hi guys, I'm trying to figure out how to properly draw the attached file surface. as you can see the striped supex does not follow the 3d edge, and also the thickening is wrong. Someone kindly can give me some indication.
Thank you

 

[daaninone]

Can't anyone help me properly close this surface?

 

[marcof]

Hi guys, I'm trying to figure out how to properly draw the attached file surface. as you can see the striped supex does not follow the 3d edge

? It seems to me that he follows it perfectly. isn't that you just set up too low viewing quality so you feel like you see holes in the edges?

and even the thickening is wrong.i

in the file that you attached the thickening function was not there. to me the thickening of the surface, to the outside and up to 2 mm, comes, even if then in correspondence of the extremes the striped surface creates a solid that docs slightly, but if this is a problem you can only know according to what you have to do later with that surface.
try to explain yourself more clearly

 

[daaninone]

Thanks for the answer marcof, I have to thicken and mirror, now I can't control but to me the thickening command could not succeed at the extremes something happens, moreover if you try to mirror and join here too there is something wrong. the central face of the piece is not on the floor. How do I not deborte the striped surface?