The roof is supposed to be held on with several sheet metal screws. I built it with the screws in to put it together, and when I got done, I took out all the screws that hold the roof on. The roof snaps on around the top of the shed and it is really hard to get off by just pushing up on it even with no screws to secure it on. I have to use a screw driver to pry it up to get it started.