What Is Flashing & Why Is It Important? 

Apr 16, 2024

Flashing is a thin metal, usually aluminum, copper, or galvanized steel, that is installed under the shingles to redirect water away from any susceptible areas. You may have noticed it on the edges of your roof, around your chimney, in the valleys (the area where too roof slopes meet), or around vents or skylights. These areas are very susceptible to water penetration and can result in leaks if they aren’t protected with flashing that has been properly installed.

Leaks can cause real damage – damage to your roof’s underlayment, damage to your trusses and frame, your attic and insulation, your walls and ceilings – anything that lies beneath your roof.

There are several types of flashing and methods of installation, depending upon the area it will be used. Some of the most common types are:

  • Step Flashing – This is the L shaped flashing that is used at the walls following the rake of the roof – it is installed between each shingle.
  • Counter Flashing – This is installed atop the step flashing where the roof meets brick or stucco surfaces.
  • Apron Flashing – Similar to step flashing as it’s L shaped and used where lateral surfaces meet the roof.
  • Drip Edge – Installed at the edge of the roof over the facia and under the shingles to keep water from getting underneath.
  • Valley Flashing – This is installed where two roofing slopes or gables meet and directs water down and into gutters.
  • Kickout Flashing – This is used where gutters end on a sidewall and helps direct water away from the roof or toward the gutters.

A skilled and reputable roofing company like Roofing Solutions will know the proper type of flashing and methods of installation required for your roof, based on their wealth of knowledge and experience.