What is the purpose of a roof rain deflector and how does it help protect a building from water damage?

A roof rain deflector is used to redirect rainwater away from the building's walls and foundation. This helps prevent water from seeping into the structure, which can cause damage such as mold growth, rotting wood, and structural weakening. By guiding rainwater away from the building, a roof rain deflector helps protect the building from water damage and prolong its lifespan.