Some of the most important of these elements for the exterior of a home is window surrounds with heavy mullions. These structures can be quite complex with asymmetrical side blocking, chamfered sills, and beautiful label moulding detailing the top portion. Label moulding serves both a practical function (serves as a drip moulding to keep water away from the window orifices) and a non-practical design function (helped to define the rectangular shape of a sometimes arched structure plus define the spring line of the arches). An Old Europe Style window surround’s asymmetrical side blocking certainly strengthens one of architecture’s greatest qualities: its changeability. The large copings found in these surrounds, plus the side blocking, label moulding caps, large mullions, and large sills all work together to emphasize the beautiful glazed “lights” or windows found in structures.