Creating a block from two wireframes I'm a very new Blender user (read: no experience).

I would like to create a block between two wireframes without losing the "texture" of the wireframes. A previous attempt using the Loft function was largely successful, but seemed to connect points from the bottom wireframe to points on the top wireframe.

Is there an easy process to create a block between two wireframes without having the wireframe points connect between layers.

Thank you for your help :)

EDIT: Currently I have three wireframes 'layers', I've sketched these out, but simplified them for the purpose of this question.

I would like to connect layer 1 and layer 2 to create one block, and also connect layer 3 and a copy of layer 2 to create a second block. 

EDIT 2: Following Rick Riggs' animation, I was able to create this. This looks like what I am trying to do, but the object still has an internal structure. What I am trying to create is an object that has either no internal structure, or is solid, so that I am able to calculate a volume. My apologies for not being clearer, but this is very new territory for me. Thanks again for all your help :)
This may be what you are looking for, if it is then I will circle back around to explain the details.