Yes, the roofs have a minimum slope of 2%. The upper roof slopes from front to back ad the wood fascia is higher on 3 sides and conceals this slope. If you look at photos of the back of the house you will be able to see the eavestrough and downspouts. The lower roof over the garage has internal drains that go into the garage and is piped to a storm line. The lower roof over the entrance slopes from right to left with the downspout feeding the garden.