Your chimney is quite unlike anything else in your house. It sits there, out of view and never seems to encroach on your daily life. Indeed, it shouldn’t. Your chimney’s main role is to allow dangerous combustion gases to evacuate your home – the chimney has a very important job but most of it cannot be seen. Many chimneys can be hundreds of years old and the property would have undergone many renovations but no one has checked the inside of the chimney.