Kickout Flashing is a key component in your roof drainage system, a code requirement, and rarely installed!

Since 2009, the International Residential Code (IRC) has mandated kickout flashings; however, they are frequently overlooked during the construction process. Kickout flashing, often referred to as diverter flashing, is a specialized type of flashing installed at the junction of a roof and a wall. Its primary purpose is to redirect rainwater away from the wall and into the gutter, thereby preventing water from infiltrating the building envelope. This is particularly critical in locations where roof eaves meet vertical walls, such as at the edges of garages or where porch roofs extend from the house. It can also be important at the junction of valleys and gutters to keep water from overshooting the gutter.

Proper installation of kickout flashing is essential for safeguarding a building against water damage. In its absence, rainwater can accumulate at the wall intersection, resulting in potential problems such as:

- Water penetration into the wall

- Mold proliferation

- Structural damage to framing and insulation

Proper installation of kickout flashing is critical to ensure functionality and maintain a water barrier. A good first step is to begin by cleaning the area. The installer will need to cut a flap in the weather-resistive barrier (WRB) to expose the sheathing. Then, the

the flashing should be placed so it extends outward from the wall, channeling water into the gutter. The angle should be at least 110 degrees. The bottom seam of the flashing need to be watertight to avoid leaks. Finally, the flashing should be layered with materials such WRB, roofing, and siding for a continuous water barrier.

Some common installation defects to avoid are:

- Angling the flashing at less than 110 degrees

- Flashing height less than 6 inches that may not effectively redirect water.

- Modifying the kickout flashing for aesthetic reasons that ultimately reduces the effectiveness of the design.

If your home is like mine, it was built before kickout flashing was required. Look for an opportunity to correct this situation with your next gutter upgrade or planned roof repair. Kickout flashing is a crucial element in preventing water damage and ensuring the durability of your home. Don't leave home without it!