If you have a flat roof on your commercial building, you know that it needs a different approach than a pitched residential roof. You may not have thought about this, but the climate of North Dakota can contribute to the issues that flat roofs are already susceptible to. This is not a time when a generic contractor with a wide range of services will do you a lot of favors. The Real Enemy of Every Flat Roof in North Dakota The one thing that can be most harmful to most flat