If you are worried about security with a lazerlite roof, bolt a sheet of mesh under it secured with a few lengths of metal strap ( I did this on my shed ) if anybody jumps through it they wont get past the mesh and it looks a bit sus to the neighbors if there is someone on your shed roof with an angle grinder or a set of bolt cutters. Put a couple of big padlocks on your door to, it's a bit hard to get your car out through the roof of your shed. PS keep your power tools locked in a metal cupboard or they can just cut their way out using your tools.