Create a geometry / solid (element) between two surfaces

Hello, is it possible to create a geometry / solid (element) between two surfaces (they are on top of each other)?
I have elements in Revita, I used Dynamo to extract surfaces (there are more surfaces and they have holes and they are also inclined), which interests me and needs to create a solid between these surfaces and some level above or below them. Thank you

@kalataFR2DT , hi, how about thicken the surface?


I tried. It would be good, but the surface with a slope does not make the thickness in the z-coordinate, but perpendicular to the surface and then I have a gap.

I also tried it by creating a board and then setting the shape. However, I can’t use a dynamo to make a board with an internal division. If it were possible, it would solve the whole thing.