Comprehensive Roofing Terms Glossary

Demystifying Roofing Jargon: An In-Depth Look at Key Terms

Roofing projects can often be complex, filled with industry-specific jargon and terminology that might be unfamiliar to homeowners and those new to the field. Our comprehensive guide to essential roofing terms aims to demystify these terms, providing clear definitions and explanations. Whether you're a homeowner embarking on a roofing project, a student studying construction, or a professional looking to refresh your knowledge, this glossary is designed to be your go-to resource. Explore the terms below to gain a deeper understanding of roofing concepts and enhance your ability to make informed decisions.


The structural base for the roof, usually made of wood or plywood.


A structure containing a window that projects vertically from the plane of a sloping roof.

Double Lock Seam

A type of joint used in metal roofing.


A pipe for directing rainwater from the roof to the ground.

Drip Edge

A metal flashing or other overhanging component with an outward projecting lower edge, intended to control the direction of dripping water.


The lower border of the roof that overhangs the wall.

Eaves Flashing

Additional layer of roofing material applied at the eaves to prevent water damage.

Expansion Joint

A joint allowing for expansion and contraction without distortion.


A decorative board extending down from the roof edge either at the eave or at the rake.


A building paper made of recycled paper and/or rag fibers impregnated with asphalt.