With the majority of leak calls for residential roofs we get, we don’t actually see water dripping from the roof. Instead, we find water stains on ceilings. Water stains are good indicators that there is a problem. And most of the time, the problem is a roof leak. However, water stains on the ceiling don’t always mean a roof leak. There could be a window or siding problem causing the water stains. But what we’re going to focus on in this post is what residential roof problems can cause leaks. While there are many things that can lead to roof leaks, all leaks can be boiled down to two simple main causes.