A leaking roof is one of the most concerning things a homeowner can face because it can lead to mould. If mould grows up under your roof or in your attic, it can work its way into your ventilation system. That means mould spores will be circulated throughout your home, leading to illness and, in some cases, even death. For this reason, you need to have any leaks dealt with right away. Here are some of the most common things that can cause leaks. Being aware of these causes can help you catch leaks before mould begins to grow.