Is Styrofoam a obedient insulator to be used lower than a raise home. If so, proper installation of.? Best cuting tools, thickness, which side face the floor, how to proper...

Best cuting tools, thickness, which side face the floor, how to proper anchor, etc.
Have 2 lights next to 2 switches. want...
Answers:    what kind is it and is it made to do that?if its get a silver facing on it,that faces the weather/opposite side of structure.it doesn't business how or what you cut it with.simply as long as it fits tight.if you do have gap fill it next to expanding foam.you could use slats with nail going through it,screws near big washers,etc anything like that will be fine.