Also, if you are not getting the heat shrink kind of mylar, be prepared for some nasty wrinkles. Without the heat shrink you will have to be very careful.
Van's advice is good. Adhere the whole thing down. It will be tricky and take a few people to keep out wrinkles as you lay it down.
I hope you don't get the fun
house mirror effect I got the last time I tried to use Non-heat shrink mylar on stage. "Music and the Mirrors" turned into a horror show.
