The first room of our Haunt won't have a scare, it will be set up like a den or library but it needed shelves. Unfortunately we join the build when its almost completed but I think you'll get the idea. This year we decided to use recycled fence panels for walls and in some areas even as roofing, this room is under a 20x20' portable carport with a plastic tarp roof, you can see on the walls where we used spare pickets to "finish" the wall to meet the roof line, giving us a decrepit shack look with high ceilings.
Step 1: The materials
There is a show on cable called "Hanging with Hackett" were the guy creates amazing stuff from found objects he calls obtainium, that's a FANTASTIC word and I quickly adopted it, I also came up with the word possibilium to cover the same found,scavenged, recycled,donated materials these shelves are built from possibilium, so one of the first steps is to peruse your pile of possibilium. We went through the piles and pulled out various lengths of 2x12, 2x10", 2x6 and 2x2. You can get by with a hammer, saw and power screwdriver but thanks to my sons, master carpenter, father in law and his mobile workshop we had everything from a cutoff wheel and grinder for removing nails to a chopsaw and air nailguns.