Trying to figure out what goes into one roofing? Here's a quick reference to the most frequent components of a roof, courtesy of this handy glossary.

What are the most typical components of a roof?

Roof Ridge: The roof ridge or ridge of a roof is the horizontal line spanning the length of the roof where the two roof planes meet. The peak, the highest point on a roof, is formed by completing these two ridges. Hip and ridge shingles are mainly built for this area of one roofing.

Ridge vent: A ridge vent is an exhaust vent that runs horizontally along the top of one roofing, enabling warm, humid air to escape from the attic. Use our ventilation calculator to figure out how much exhaust ventilation you'll need to adequately ventilate your roof and attic.

Flashing: Flashing is a metal material that prevents water incursion at joint openings, around chimneys, and in any dormer or skylight. You may identify flashing as metal stair steps near a chimney or sidewalls on a roof.

Hip: The hip on a roof is the junction of two roof planes that meet to produce a sloping ridge going from the peak to the eave. Hip and ridge shingles are mainly built for this area of a roof.

Deck: The roof system's structural basis is the deck, often built of plywood or hardwoods such as oak or maple.

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Roofing Underlayment: Roofing underlayment is a layer of material, generally synthetic or felt, that gives additional protection on top of the roof deck and beneath the tiles. Underlayment made of synthetic materials helps to keep moisture at bay and guards against leakage. Due to its proven water resistance and long-term durability, synthetic underlayment is replacing felt like a preferred material option for flooring.

Roof Valley: Two sloping roofs meet at an angle in the roof valley, creating a V-shaped junction for water drainage.

Laminated Architectural Asphalt Shingles: One roofing using laminated architectural asphalt shingles has more than one layer of tabs for added dimension, performance, and longevity. Architectural shingles are also known as three-dimensional shingles or laminate shingles in certain circles. Architectural shingles are the antithesis of three-tab shingles, which are made of a single sheet of tabs and seem flat or without the dimension of a laminated shingle.

Roof Gable: A roof gable is the triangular piece of the outside wall at the top of the roof between a sloping roof and eave. A roof gable is also referred to as a rake.

Metal drip edge: A metal drip edge is a small strip of noncorrosive metal used at the rake and eave to assist control dripping water by enabling water discharge to preserve the underlying part of a wall.

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Dormer: A dormer is a portion of one roofing that has been elevated. It is usual for dormers to have a vertical window through the roof slope.

Ice and water barrier: An ice and water barrier is a self-adhered waterproofing membrane put along eaves, valleys, sidewalls, and other vulnerable places to protect against ice damage and wind-driven rain.

Eave: An eave is the bottom border of one roofing that overhangs the wall, generally placed in the first three feet of a roof.

Undereave vent: Under eave vents are intake vents positioned beneath the roof's eaves that assist bring cold, dry air into the attic.