It does not look like my previous message got through so forgive me if this is a duplicate. I built a shed in my backyard. It is constructed of resin. The interior is about 7 x 7 feet. The roof is slanted and is about 7 feet high at the apex. There are 2 doors that open- one to the right and one to the left. The doors are flush with the walls.Therefore there is no doorpost on the inside or outside. Does it need a mezuzah? If yes, where do I put it? Thanks.