The WeatherGuard structural insulated roof system is C-Thru’s own exclusive roof system. This patented roof system comes available in 3″, 4″ and 6″ thick roofs allowing you to design your sunroom for your particular weather climate. Whether it’s hot and sunny most of the time or if the deep snows of winter are your concern, our WeatherGuard roof is your solution.When it comes to elegance no one can beat our WeatherGuard roof system’s great looks. Because unlike most other industry standard roofs, C-Thru’s roof has a patented snap locking system (joining the roof panels together) eliminating exposed screws and unattractive obstructions in the ceiling. Our exclusive patented snap locking system designed with internal weep channels helps prevent unwanted water from leaking in to your room. Making it hands down the industries most sate-of-the-art system.