Offset mesh to solid panel

Hi everyone,

I’m sure this is a classical issue, I search on forum but can’t find answer to this particular question.

Capture d’écran (125)

I’m working on offset simple mesh in order to make solid from the same triangle but with thickness, in this image, how can I make a solid with these two faces A and B ?
And of course for all triangles in original mesh ?

Here there definition with internalized data !
thnks (19.0 KB)

hi @clem.granger

You where almost there. (18.7 KB)

Thank @erikbereen to have taken time to answer this super easy issue !