A Homeowner’s Guide to Common Roofing Terms
Whether you’re replacing your roof after a storm or simply trying to understand what your roofing contractor is talking about, our roofing term glossary below helps roofing terminology feel less overwhelming. This glossary explains common roofing terms in plain English, helping you better understand your roof and make informed decisions about repairs and replacements.
Roofing Materials
Asphalt Shingles
The most popular residential roofing material in the United States, asphalt shingles are affordable, durable, and available in a wide variety of colors and styles.
Architectural Shingles
A thicker, dimensional asphalt shingle designed to provide enhanced durability, longer life, and a more attractive appearance than traditional three-tab shingles.
Three-Tab Shingles
A flat asphalt shingle with a uniform appearance. While still used on some homes, architectural shingles have become the more common choice due to their improved performance.
Built-Up Roofing (BUR)
A roofing system commonly used on flat or low-slope commercial buildings. It consists of multiple layers of roofing material and asphalt for added durability and waterproofing.
Modified Bitumen
A durable roofing material designed for low-slope roofs that combines asphalt with reinforcing materials to improve flexibility and weather resistance.
Roof Components
Decking (Roof Deck)
The wooden surface, typically plywood or OSB, that forms the structural foundation of your roof. All roofing materials are installed on top of the roof deck.
Underlayment
A water-resistant protective layer installed between the roof deck and shingles to provide an extra barrier against moisture.
Flashing
Thin metal installed around chimneys, vents, skylights, valleys, and other roof penetrations to help prevent water from entering your home.
Drip Edge
A metal flashing installed along the roof edges that directs rainwater into the gutters while helping protect the roof deck from water damage.
Fascia
The vertical board attached to the ends of the roof rafters where gutters are typically mounted.
Soffit
The finished underside of the roof overhang that helps ventilate the attic while protecting the rafters from weather and pests.
Ridge
The highest horizontal point where two roof slopes meet.
Valley
The inside angle where two roof sections meet. Valleys are designed to channel water safely off the roof and require proper flashing to prevent leaks.
Vent Pipe Boot
A rubber or metal flashing that seals around plumbing vent pipes extending through the roof.
Roofing Terms
Roof Pitch
The steepness of a roof, commonly expressed as the number of inches the roof rises vertically for every 12 inches of horizontal distance (for example, a 6:12 pitch).
Roof Square
A unit of measurement used by roofing contractors equal to 100 square feet of roof surface.
Roof Ventilation
A system of intake and exhaust vents that allows air to circulate through the attic, helping regulate temperature and reduce moisture buildup.
Granules
The ceramic-coated particles on asphalt shingles that protect against UV rays and weather while adding color.
Tear-Off
The process of completely removing the existing roofing materials before installing a new roof.
Re-Roofing
Installing a new layer of shingles over an existing roof when building codes and roof conditions allow. While possible in some situations, a complete replacement is often the better long-term solution.
Common Roof Styles
Gable Roof
A roof with two sloping sides that meet at a ridge, creating the familiar triangular shape found on many homes.
Hip Roof
A roof with slopes on all four sides that meet at the top, providing excellent stability and wind resistance.
Flat Roof
A low-slope roof commonly found on commercial buildings and some modern homes.
Need Help Understanding Your Roof?
Whether you’ve noticed storm damage, are planning a roof replacement, or simply have questions about your roof, the experienced team at Biltmore Roofing is here to help. We’re happy to explain your options and provide honest recommendations so you can make confident decisions about your home.
