It helps protect the shed and its roof from damage ... so hiring a professional to install one will be more expensive.
Now, use a plastic sheet weighed down by sticks as your roof. Alternatively, opt for a more long-lasting shed roof material, like cedar shakes. Read the original article on House Digest.
Line the roof of your shed with a piece of plywood wrapped in waterproof butyl lining. This will protect the roof of the shed from any potential water damage. Lift the wooden frame into place.