Function and design of Barndominiums As for the L shaped barndominiums, you can make it usual in the exterior with red color of wood barndominiums or just a metal house with windows. If you like, in the inside curve of the L shaped barndominiums, you can make it as a little garden, or a small wood gazebo or play ground for your children. While in the inside, you can use laminate wood for the floor, and furniture that are suitable with it. You can play with the lamp to make your barndominium more dramatic. Ideas & Inspirations.