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Roofing Terms


Bubbles or Blisters (usually moisture) in shingles. Moisture is trapped inside the material.

HVAC Unit:

A heating, ventilating and air conditioning unit adapted for your roof.

Plastic Cement:

Asphalt based sealant. Also called bull, mastic, tar, asphalt cement.


When shingles are forced off a roof deck because of high winds

Ice Dam:

Occurs when water builds up behind a blockage of ice. Ice dams can occur in various ways

Plumbing Vents:

Term used to describe plumbing pipes that project through a roof plane. Also called vent stacks.


Materials used to waterproof a roof around any projections through the roof deck.

Infrared Thermography:

Is being used to take pictures of roofs at night to find trouble spots.

Roof vent:

A device used to ventilate a roof cavity.

Hot Stacks:

Ventilation pipe for venting of heat producing equipment.

Parapet Wall:

Portion of an exterior wall that continues above the line of the roof surface.


Area where two adjoining sloped roof planes intersect on a roof creating a “V” shaped depression.

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