|The facade has technic pins projecting from the back which you can attach to a Technic beam (brick with holes) built into the front of your own building shell. This allows you to remove the facade and exchange it for a different one if you wish. You can also use your own regular bricks to build the facade onto the front of your building shell during construction.The rear of the building is flat apart from the projecting pins, so if you wish you can build it without the pin bricks and back it up to a flat backdrop. All the facades in this series will be a maximum of 4 bricks deep at the base, so you can fit a detailed street front into a very narrow space (for example, behind train tracks).
You can see a series of pictures of a “City Block” diorama using facades similar to this on my Brickshelf Gallery pages.