Roofing Glossary of Terms

Roof Vent Pipe Field of Roof System Ridge Flashing Hip Soffit Gable Rake Drip Edge Valley Gutters Underlayment Eave Vent
Water AbsorptionThe increase in weight of a test specimen expressed as a percentage of its dry weight after being immersed in water for a specified time at a given temperature.
Water CureTo control the rate of cure of materials such as concrete by spraying a fine mist of water on the surface.
Water Cut-offSee Night Tie-Off.
Water GuardA turned up edge on valley metal or continuous wall flashing; used to prevent water migration under the roof system.
Water StopMaterial placed over a joint and used to prevent water entry.
Water TroughThe area in a valley where water runs. Usually referred to with open valley configurations.
WaterproofBeing resistant to moisture infiltration.
WaterproofingThe treatment of a surface or structure in order to prevent the passage of water under hydrostatic pressure.
WeatherTo undergo degradation in quality and appearance which is caused by exposure to the sun, wind, rain, etc.
Weep HolesSmall holes used to permit moisture to drain that has gathered inside a building component.
WeldTo join multiple metal or PVC components together by heat fusion.
Wet Bulb TemperatureAir temperature in ° F as measured by a thermometer with a bulb covered by a damp wick.
Wet Film ThicknessThe thickness of an uncured material such as a coating.
WickTo convey liquid by capillary action.
Wind ClipA clip that slips over the ends of tile, slate and other steep slope roofing materials in order to help prevent wind uplift damage.
Wind LoadThe force that wind puts on structures.
Wind Uplift(1) The upward displacement of a section of a roof system or component caused by movement of air from a location of higher air pressure, such as inside a building, to an area of lower air pressure, such as the surface of a roof during a windy day. Strong wind across the surface of a roof, especially at corners and along perimeters, creates low air pressure above the surface of the roof. Nature will automatically try to compensate for this by moving air from an area of higher pressure such as inside a building. If all penetrations and perimeters are not properly sealed, then "blow-off" can occur. <BR><BR>(2) Displacement or blow-off of shingles or other roofing caused by the wind.
WindwardFacing into the wind.
Wire TieA system for attaching heavy steep slope roofing materials such as slate r tile by using wire fasteners in addition to or in place of nails.
Woven ValleyA valley construction whereby the valley has a woven look which is effected by overlapping alternate courses of shingles from both sides of the valley.

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Rough Estimator

Roofing contractors have a language all their own. Don’t get bogged down by the jargon. Check out the glossary for clear, simple definitions of roofing terminology.