They also include built-in seating and intricate design elements like finials, lattice work, and pillars. On the other hand, pergolas have an open roof and pillars. The roof consists of crisscrossed wooden beams, and the pillars support an overhead structure that offers maximum shelter and shade from the sun. You can choose custom gazebos and pergolas in Toronto that will enhance your backyard's look while providing protection from rain and sunlight.