Kickout flashing, also known as diverter flashing, is a special type of flashing that diverts rainwater away from the cladding and into the gutter. When installed properly, they provide excellent protection against the penetration of water into the building envelope.
Several factors can lead to rainwater intrusion, but a missing or improperly installed kickout flashing, in particular, often results in concentrated areas of water accumulation and potentially severe damage to exterior walls. Water penetration behind the siding can occasionally be observed on the exterior wall in the form of vertical water stains, although you cannot always rely on visual identification. There may be severe damage with little or no visible evidence.
The following are common defects associated with kickout flashing:
The following are locations where kickout flashing is critical:
In summary, kickout flashing should be present and properly installed in order to direct rainwater away from the cladding. If you have any questions about kickout flashing on your home, feel free to contact us.
This article originally appeared on nachi.org and is authored by Nick Gromicko and Kenton Shepard. It is used with permission.