Common Roofing Terms

Ever wonder what those roofing terms and words mean? 

Bay window (Wikipedia)

A small structure projecting from a sloped roof, usually with a window.

Eave (Wikipedia)

The horizontal lower edge of a sloped roof.

Fascia (Wikipedia)

The material covering the rafter tails at the end of the roof.

BARGE BOARDS (Wikipedia)

Exposed roofing during the installation of a new shingle roof.

Flashing (Wikipedia) 

Pieces of metal used to prevent the seepage of water around any intersection or projection in a roof system, such as vent pipes, chimneys, valleys and joints at vertical walls.

Louvers (Wikipedia)

Slatted devices installed in a gable or offset (the underside of eaves) to ventilate the space below a roof deck and equalize air temperature and moisture.


Vents, pipes, stacks, chimneys anything that penetrates a roof deck.

Rafters (Wikipedia)

The supporting framing to which a roof deck is attached.

Gable (Wikipedia)

The inclined edge of a roof over a wall.

Ridge (Wikipedia) The top edge of two intersecting sloping roof surfaces.

Sheathing (Wikipedia)

The boards or sheet materials that are fastened to rafters to cover a house or building.

Truss (Wikipedia)

Engineered components that supplement rafters in many newer homes and buildings. Trusses are designed for specific applications and cannot be cut or altered.


The angle formed at the intersection of two sloping roof surfaces.

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