The mechanisms that facilitate this are robust and built to last so they wont fail over time. This is the clever part. The shuttered roof when closed is completely waterproof but also has drainage channels housed within the shuttered sections which allows excess rain water to drain off and down specially engineered channels on the inside of unit that send the water to rack corner where there is plastic drainage outlet.Other Sizes and models available. Call 0203 869 8966 for a friendly chat about your requirements. We can install any of the above models if you would prefer. The item "Galaxy Style Roof Pergola SunshadeHot Canopy, Permanent Garden Awning Gazebo" is in sale since Sunday, July 7, 2019. This item is in the category "Garden & Patio\Garden Structures & Shade\Gazebos". The seller is "meredewstores" and is located in Basildon. This item can be shipped to United Kingdom.