Roofing Glossary

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Roofing Glossary

  • Asphalt – an organic bituminous mixture used in the production of production shingles.
  • Asphalt Roofing Cement – used to connect roofing elements, also known as flashing cement or mastic.
  • Base Flashing – the element of the flashing that joins the roof deck.
  • Blend– mixtures of different colored granules on the exterior of shingles.
  • Blind Nailing – nails pushed until the ends are hidden by succeeding layers of roofing materials.
  • Blisters – are bubbles that may appear on the surface of asphalt roofing.
  • Bridging – is the process of replacing parts of the roof where the new shingles match the previous roof’s form.
  • Butt- is the Shingle’s piece revealed to the climate, also known as the “tab” of the Shingle.
  • Cant Strip – a 45 degree beveled lumber, fiberboard, or metal bands at the junction of the roof and a perpendicular surface used to break a right angle and fundamentally used in low sloped roofing.
  • Cap Flashing – flashing on a perpendicular cover to stop water flow by overlapping the base flashing. This flashing is generally not altered when a roof is replaced.
  • Caulk – a substance for filling a joint or void.
  • Cement – a material, when cured, binds to surfaces together.
  • Class “A” – the most distinguished fire-resistant roofing material as per ASTM E-108. These Shingle withstand exposure to fire compared to other classes of shingles.
  • Closed Valley – roofing materials that cover the entire Valley. 
  • Coating – a layer of asphalt used on shingles in which granules are set.
  • Collars – pre-formed flange set over a vent. 
  • Counter Flashing – Cap Flashing.
  • Course – a horizontal section of roofing running the width of the roof.
  • Cricket – a small peaked saddle built on the tip of the first roof and behind the chimney. Cricket is usually not required.
  • Cupola – a structure extending above the roof. It is usually used for air-conditioning.
  • Dead Level – section of the roof that is flat at any angle.
  • Deck – the material fitted over the framing of a structure on which shingles are installed. 
  • Double Coverage – a means of applying roof shingles so that two full layers of material are provided.
  • Dormer – a window unit is extending through the sloped level of the roof.
  • Drip Edge – metal strip used on eaves and rakes to provide for runoff without harming underlying elements
  • Drip Course – the first row of shingles that somewhat projects over the edge of the roof.
  • Eave – the edge of a roof that projects over the outer wall.
  • Exposure – the side of the Shingle that is exposed to the climate. 
  • Lap – the overlap of the surface of one roofing material to another.
  • Laminated Shingles – shingles that include more than one layer of tabs, making them thicker.
  • Lock Shingles – shingles with a fixed locking characteristic. These are uncommon shingles.
  • Low Slope Application – the process of implementing shingles on slopes between 2 and four inches per foot.
  • Mansard Roof – an upright part of the roof.
  • Mastic – asphalt roof sealant.
  • Modified Bitumen – Roller roofing layer with a polymer-modified asphalt. The role will usually have a fiberglass or polyester mesh for reinforcement.
  • Nesting – bridging.
  • Standard Slope Application – the process of installing shingles with dimensions that are between 4 and 21 inches per foot.
  • Open Valley – the metal valley where roofing material does not cover the whole valley area as in a Closed Valley.
  • Saturant – asphalt used to soak felt to ensure that the felt is waterproof and robust.
  • Seal Down – a factory-applied asphalt band used to bond a shingle to the one above. Produce wind resistance.
  • Sheathing – Standard beams used for a roof deck.
  • Skirt Flashing – A large piece flashing, usually located at the base of a dormer or extension.
  • Slope – the degree of angle of a roof plane.
  • Soffit – the finished bottom of an eave.
  • Soffit Vent – An opening used for intake of outside air. These are not part of a standard roof but are sometimes needed for proper attic air-conditioning.
  • Soil Stack – a vent that is placed on the roof.
  • Span – the horizontal distance from eave to eave.
  • Square – a division of roof measurement covering 100 square feet.
  • Square Butt Shingles – generally three-tab 20-year-laminated shingles.
  • Starter Course – the first area of shingles installed on your roof. It will be under the first visible row. Often these shingles are 20 years three-tab shingles. To avoid bumps, they are usually heavier layered shingles installed.
  • Tab – the portion of strip shingles surrounded by cut-outs or slots, so the material seems to be exclusively applied when installed.
  • Underlayments – An asphalt-saturated felt fitted over the roof level and below the roofing material. There is a wide range of quality and value in underlayments.
  • Valley – the junction of roof slopes.
  • Vent – an opening for air.
  • Weathering – shifts in color, texture, or efficiency caused by exposure to the daily climate.

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