There are two different roof projects. The one with the peaked roof was a simple remove and replace the existing material. The one with the flat roof was a different story. The interior partitions were not strong enough to support the original roof and had caused it to sag allowing pools of water to form. The extra weight from the water eventually broke the roof rafters. We had to tear everything off and increase the height of the front wall to give the roof more of a slope. Then we built new interior walls that are strong enough to bear the weight of the new roof. By the time we were finished, only the exterior walls remained of the original structure. Click on any picture for expanded detail.