I've been re-reading Island of Fire from Leaping Horseman Books about the battle around the Red Barricades factory (they have some of the best books on the subject in the business), so I figured I needed to make some buildings (out of cardstock) so I can do some 15mm Stalingrad battles.
I've got about 1/2 of the number of buildings I need.
Not quite enough buildings yet....
I've got the templates down so that I can easily create inner-outer walls and the process down on how to print them on a single side and fold them over to create inner and outer walls easily. For mere pennies I can create rubbled buildings in any configuration I choose to (they have to fit my 3 inch hex grid).