How to Install Metal Flashing for a Door Frame

Flashing, whether around your doors, windows or chimneys, repels moisture and directs it away from your home. According to Tim Carter of Ask the Builder, excessive moisture that seeps beneath an improperly flashed door frame can cause extensive damage to your flooring. Metal flashing, often called “sill flashing,” is one of the many flashing options available for exterior doors. Because this flashing must be installed underneath the threshold, it's best to install sill flashing either during the home's construction or as part of an exterior door replacement project.

Things You'll Need

• Dry cloth
• Metal flashing
• Nails
• Hammer

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Instructions

1. • 1

     Dust the bottom of the door frame where you plan to install the flashing with a dry cloth. This is especially important during a home's construction to avoid trapping sawdust and other building debris beneath the flashing.

   • 2

     Position the flashing in place. The flashing should cover the bottom of your door frame and extend beyond the door jamb, creating a drain slope that prevents water from reaching the door frame or sub-flooring.

   • 3

     Nail the flashing directly into the door frame.