KNOW THE LINGO
Deck: The substrate over which roofing is applied—usually plywood, wood boards or planks.
Drip Edge: An installed lip that keeps shingles up off the deck at edges and extends shingles out over eaves and gutters to prevent water from wicking up and under the shingles.
Exposure: The area on any roofing material that is left exposed to the elements.
Flashing: Materials used to waterproof a roof around any projections.
Granules: Crushed rock that is coated with a ceramic coating and fired, used as top surface on shingles.
Ice Dam: Formed when snow melts on a roof and re-freezes at the eave areas. Ice dams force water to “back up” under shingles and cause leakage.
Laminated Shingles: Asphalt-based shingles made from two separate pieces that are laminated together. Also called dimensional shingles or architectural shingles.
Soffit Ventilation: Intake ventilation installed under
the eaves or at the roof edge.
Steep-Slope Roofing: Refers to slopes steeper than a 4” rise for every 12” of length (expressed as 4:12).
Tear-Off: Removal of existing roofing materials down to the roof deck.
Valleys: Areas where two adjoining sloped roof planes intersect on a roof, creating a “V”-shaped depression.
Source: GAF Materials Corp.
It wasn’t long ago that roofing wasn’t much more than an afterthought—chosen for a house mostly for economic and occasionally for aesthetic reasons, if you could afford it.