How do I add thickness in surface?

Hi there! I am Janet, a second year archiecture student.

We drew 56 meshs in rhino and used grasshopper + kangaroo to create a shape. We then baked it.

We would like to 3d print it. But the problem is we cannot add thickness to the surface (baked from grasshopper).

What do you suggest me to do?

Thanks in advance for your help!

Is it a surface or a mesh? Weaverbird has a nice mesh thicken component. Pufferfish also has a different mesh thicken component (offset mesh) as well as a surface thicken component (offset surface).

it is an open mesh, from the propety panel - object type