Typically outbuildings have a felt roof membrane. Felt roof membranes deteriorate faster than the treated timber used in their construction. It is worth upgrading any roof with EPDM rubber due to its lasting properties that will keep your outbuilding in better condition for longer whatever the location or weather.
Outbuildings that are detached from the main property do not normally need to comply to building regulations.
The shed cover membrane has not been subjected to the rigorous testing required by building regulations, however it is the same thickness and similar specification to the one piece EPDM making this the most cost effective solution for any roof not requiring building control approval.