Water Gutter Design: The water can drain quickly due to the sloped roof design, the water gutter design ensures the rainwater can flow down instead of accumulating on the top. Sturdy Aluminum Frame: Built in triangle structure, so the gazebo will be sturdier and more stable. With power-coated aluminum frame, the materials are rust-resistant, waterproof and will be last for many years.  Installation suggestions:   1.It will take two people 6~7 hours to complete.   2.Layout all parts before beginning assembly.   3.Definitely recommend power drills and a solid Allen wrench set to speed things up.