After completing the grid benchwork and attaching it to the existing benchwork, the next step is to add the hardboard backdrop. Hardboard makes a nice smooth backdrop, can be easily painted, inexpensive, and easy to work worth. Some model railroaders are using sheet styrene but I have never worked with it.
My backdrop extends approximately 44″ inches above the layout to extend almost to the ceiling. The first step installing the backdrop is to attach vertical supports to the grid benchwork. These can be spaced apart 18-24″. I make mine by attaching two 1 X 2’s together into an L shape. This gives the supports quite a bit more rigidity. I use yellow glue and a brad nailer with 1 1/4″ nails to do this. I find myself using glue and nails versus screws and glue much more often these days. The glue provides the real strength and the nail or screw really just holds things together until the glue dries.
I did use screws and glue to attach the uprights to the benchwork. There is quite a bit of stress to support the corners since the springiness of the hardboard is trying to return the board back to its natural and flat state. One thing I had to deal with was some low hanging duct work. I used a scrap narrow piece of hardboard to determine where the backdrop needed to be lowered.
These measurements were transferred to the full size piece and cut appropriately. The hardboard is attached using my brad nailer and lots of yellow glue as well as clamps. Glue is most important.
I will later finish the seams and any nail holes with drywall compound. Here is a nice shot of the entire section:
The next post will cover cutting and fitting the plywood subroadbed as well as the Homasote roadbed.





















