Using a router with a 3/8-in. rabbet bit, rout a 3/8-in.-deep recess on the back of the window to receive the 1/4-in. plexiglas acrylic sheet. set the window frame, recessed side down, over a piece of acrylic sheet and trace the shape with a permanent marker.. A successful diy shed starts with choosing the right shed plans. first, determine how much space you can commit to an outbuilding, and check local codes for setbacks as you decide where to put it. it’s also important to consider what you’d like to store in the shed. small tools can be hung on walls to save space, but large items like.