Chimney – a hollow vertical structure, usually made of brick or steel, that allows gas, smoke, or steam from a fire or furnace to escape into the atmosphere. Cricket – A peaked saddle construction at the back of a chimney to prevent accumulation of snow and ice and to deflect water around the chimney
Eave – The line formed by the intersection of the roof and sidewall.
Endwall – Roof condition where the end of the building connects to the lower roof. Gable – A triangular portion of the endwall of a building directly under the sloping roof and above the eave line. High Side Transition – Roof condition when it transitions to another roof pitch.
Hip – A roof which rises by inclined planes from two or more sides of the building.
Rake – The intersection of the roof and wall at the gable end. Ridge – Highest point of the roof of the building which describes a horizontal line running the length of the building. Sidewall – Roof condition where the wall connects to the lower roof. Valley – The internal angle formed by the intersection of two sloping roof planes. | 
