Demystifying Roof Flashing: A Comprehensive Guide

Roof flashing is a critical component in protecting your home from water damage. It is typically made of thin steel installed around vents, chimneys, walls, skylights, valleys, edges, and dormers to prevent water from penetrating your attic and house. Expert contractors like Advantage Remodeling and Roofing offer superior workmanship.

Common Materials for Roof Flashing


  • Malleable and easy to solder
  • Highly durable and long-lasting
  • Develops a patina over time


  • Most commonly used material
  • Pliable and aesthetically pleasing
  • Galvanized to prevent deterioration


  • Lightweight and easy to install
  • Requires coating with masonry and concrete to prevent disintegration

Types of Roof Flashing

Continuous Flashing

  • Built in long, single pieces
  • Expands and contracts with the house
  • Directs water to the roof shingles

Base Flashing

  • Used for roof features needing two pieces of flashing, like chimneys
  • Guides water away from the roof
  • Easy to install and flexible

Counter Flashing

  • Complements base flashing
  • Installed opposite base flashing to complete the system

Step Flashing

  • Rectangular, bent 90 degrees
  • Installed in layers to direct water away from walls

Skylight Flashing

  • Used when skylights do not come with flashing
  • Custom made or bought separately

Valley Flashing

  • Made of metal
  • Protects roof valleys from water damage

Drip Edges

  • Installed on the roof’s edge
  • Helps water drain off without causing leaks or damage

Kickout Flashing

  • Closes the gap between the gutter start and step flashing end
  • Redirects water into the gutter to keep it away from walls

Ensuring Proper Installation

Proper installation of roof flashing is essential to prevent water damage. Each type of flashing has a specific function and placement, contributing to the overall flexibility and water resistance of the roof system.

If you want to know Signs of Roof Failure: Six Warning Signals, click here.

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