When it comes to choosing a commercial roofer, it's a big decision for a property as it will affect many employees or residents. In other words - it's well worth researching the facts and numbers. The numbers have been compiled and the fact is WeatherTight Systems Inc keeps buildings dry and general heating and cooling costs low. WeatherTight Systems is the commercial roofing contractor to contact for your commercial roofing project. For decades, we have worked on projects for all types of commercial buildings.