Roofing 101: A Guide to Roofing Terminology

A Rodd Roofing expert on a commercial roof surrounded by roofing supplies in northern Vermont.

Roofing 101

Key Roofing Terminology Explained

Roofing terminology can often sound like a foreign language to homeowners. Still, knowing some of the essential terms can be a great advantage when discussing your roofing needs with professionals. In this blog post, we'll simplify the language by explaining the major roofing terms you should be familiar with:

Asphalt Shingles

Asphalt shingles are the most common roofing material, made of a base material covered with asphalt and granules. They come in various styles and are known for their affordability and versatility.

Flashing

Flashing is a weather-resistant material, typically made of metal, used to seal and protect vulnerable roof areas, like joints, valleys, and roof penetrations, preventing water from infiltrating.

Decking

Roof decking is the structural base of the roof, often made of plywood or oriented strand board (OSB). It provides support for the roofing materials.

Underlayment

Underlayment is a protective layer installed beneath roofing materials to add an extra barrier against moisture. It's usually made of felt or synthetic materials.

Ridge Vent

A ridge vent is a ventilated ridge cap installed at the peak of the roof. It helps maintain proper attic ventilation, regulating temperature and moisture levels.

Drip Edge

A drip edge is a metal strip placed along the edge of the roof to guide water away from the fascia and into the gutters, preventing water damage and rot.

Ice & Water Shield

Ice and water shield is a self-adhesive membrane installed in vulnerable areas, such as eaves and valleys, to prevent water infiltration, especially in areas prone to ice dams.

Valley

A valley is where two sloping roof sections meet at an angle, usually creating a V or U-shaped area. This area channels rainwater or snowmelt towards the roof's gutter or drainage system. Special flashing and installation techniques are used to ensure proper water drainage.

Fascia

Fascia is the board running along the edge of a roof, connecting it to the outer walls. It provides a solid foundation for attaching gutters, and also protects the exposed edges of the roof and underlying structure from the elements.

Pitch

Pitch refers to the steepness or angle of the roof. It's often expressed as a ratio, indicating the rise over run, such as 4/12.

Eaves

Eaves are the overhanging edges of the roof that extend past the exterior walls. They are important for water runoff and protection.

Understanding these key roofing terms will help you navigate discussions with roofing professionals and make informed decisions about your roofing projects. When you need assistance with roofing work, don't hesitate to reach out to experts like Rodd Roofing, who can provide guidance and expertise to ensure the success of your roofing projects.

Brick suburban house with a covered front porch, dormer windows, and a shingled roof amid trees and lawn
September 10, 2026
Learn why roof valleys are prone to leaks, debris, and ice damage, plus warning signs Vermont homeowners should watch for before winter.
People sitting on a rooftop terrace with a red umbrella, overlooking green mountains and a blue sky
September 3, 2026
What happens during commercial roof maintenance? Learn how roofers inspect membranes, flashing, seams, drainage, and penetrations in VT & NH.
Residential shingle roof with gable vents under a bright blue sky, illustrating attic ventilation.
August 28, 2026
Learn how proper roof ventilation controls attic heat and moisture, supports energy efficiency, and helps protect your roof throughout the year.
Large commercial flat roof with rooftop HVAC equipment and vents under a partly cloudy sky.
August 21, 2026
August is the ideal time to assess your commercial roof, plan capital improvements, reduce emergency costs, and budget accurately for next year with Rodd Roofing.
Large mature tree with branches extending over the roof of a multi-story home.
August 14, 2026
Learn how overhanging branches, shade, leaves, and animals can damage your roof—and why late-summer tree maintenance helps protect your home.
Roofing professional in a hard hat inspecting a chimney and roof during clear late-summer weather.
August 7, 2026
Schedule a late-summer roof inspection to catch damage early, prevent costly leaks, and prepare your property for fall and winter weather.
Modern gray metal building with blue trim and small rectangular windows against a clear sky
July 30, 2026
Ensure your commercial roof is well-maintained with regular inspections. Schedule a consultation for expert roofing services today!
Aerial view of red-brick buildings with slate roofs and a parking lot on a sunny day
July 23, 2026
Discover how proper slate roof restoration helps preserve historic Vermont homes while extending the life of one of the world's most durable roofing materials.
Blue-white frost crystals on a windowpane
July 16, 2026
Learn how Vermont's freeze-thaw cycles can damage your roof through moisture intrusion, cracked flashing, and more—and how preventative inspections can help.
Red vintage truck parked beside a rustic house and covered wagon in a sunny grassy yard
July 9, 2026
Learn what Burlington-area homeowners should inspect before fall to help prevent costly roof repairs during Vermont's harsh winter weather.