The galvanized steel top helps prevent ultraviolet and withhold heavy snow and wind The parallel strips roof design promotes drainage and reduces the hassle of rain and snow The aluminum supporting poles provide strong support and ensure great wind resistance The pre-drilled base allows you to install the gazebo in different outdoor situations 12 reinforced expansion screws help add more stability and wind resistance Equipped with a dual-rail system, allow you to slide each layer with ease The mesh netting keeps you in good ventilation and good view while keeping mosquitoes away The zippered curtains provide enough privacy and protect from rain and ultraviolet The curtains and netting can be rolled and fixed by the straps, you can also detach them Installation guide