In my town today we had a very bad downpour and when I walked into the garage the entire floor was soaked with water. There is a new roof on the garage and I also checked for any signs of water damage on the sheathing and there is none. There is a drain in the middle of the floor and I noticed they have the downspouts connected to the drainage system. Do you think the water is backing up through the floor drain? Should I remove the downspouts out of the drainage and let the rain drain on the grass? Or is the water in the garage another issue?
