A few definitions may make it easier for you to communicate with roofers.
Parts of a houses roof.
Cornice the wood or metal finishing at ends or edges.
Flashing is found in valleys and at the bases of chimneys walls roof vents and plumbing vents.
It is a type of resistant moulding that prevents water flowing near roof openings from infiltrating the roof.
19 parts of a roof on a house detailed diagram custom cross section diagram of a house roof showing the many different parts of a residential roof including structural parts the various layers exterior and various roof features such as skylight and chimney.
Chimney used to vent flue gases from fireplaces or heating equipment.
Dormers in some styles of houses dormers are popular as a way of protecting windows that protrude from a roof such as on the second floor of a home.
Parts of a roof.
Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss.
Names for specific areas of your roof.
Built up roof a low slope or flat seeming roof covered with alternating layers of roofing felt and hot mopped asphalt and topped off with a layer of gravel.
Also different architectural styles will use the same type of roof.
A dormer is the entire structure consisting of wall and roof around the window.
For brevity this list of house parts keyed to the illustration shown here is condensed to keywords and phrases.