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Commonly Used Roofing Terms and Definitions
Asphalt Roofing Cement
An asphalt-based cement used to bond roofing materials
ASTM
American Society for testing of Materials
Base Flashing
Is the portion of a flashing attached to or resting on the deck to direct the flow of water onto the roof covering
Blend
In shingles it is the mixture of various colored granules on the surface
Blind Nailing
when the tops of nails are concealed by layers of roofing
Blisters
bubbles on the surface of asphalt roofs
Bridging
reroofing method where new shingles are placed where the contour of the old roofing was previously

Dormer
window projecting through a roof that is sloped
Drip Edge
metal strips on the edge of your roof to allow water run
Drip Course
shingles that slightly overhang off the edge of your roof
Exposure
the portion of the roofing shingle that is exposed
Lap
when one roofing materials overlaps another
Lock Shingles
a type of shingle that offers a mechanical locking feature
Mansard Roof
the vertical portion of your roof
Normal Slope Application
a shingle installation method calling for spacing of 4 and 21 inches per ft.
Saturant
asphalt that is used to waterproof and improve roofs overall strength
Side Lap
a horizontal lap
Slope
the angle/degree of a roof planes incline
Soffit
the underside of an eave that is finished
Soffit Vent
Opening needed for intake of outside air. Good for attic ventilation.
Spire
roof tapering up to a point
Square
roof measurement for 100 square feet of roof covering

Butt
The part of the shingle that is exposed, often times referred to as the tab
Cap Flashing
A way to prevent the flow of water from getting behind the base flashing. Done so by flashing on a vertical surface.
Cement
a substance, that binds surfaces together when cured.
Class “A”
Rating given to the highest fire resistant roofing materials
Cupola
The structure that you often times see rising above the main roof.
Dead Level
The structure that you often times see rising above the main roof.
Double Coverage
a way of applying shingles where there are two complete layers



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