Retrofit a Flanged Window Step-by-step instructions for a leak-free, energy-efficient window replacement with Bill Robinson
The most difficult part of installing a flanged new-construction window in an old opening is tying it in with the existing flashing details. Builder Bill Robinson says that you can avoid water infiltration by keeping in mind the four Ds: deflection, drainage, drying, and durability.
In this Project House video series, watch Robinson as he carefully removes the old window, flashes the rough opening to prevent water from getting inside the building cavity, installs the new window, and then flash it in. Finally, the window is cased, and then Robinson caulks and air-seals the window.
Bill demonstrates how to use a combination of materials to flash over the flanges. Finally, he installs the pre-built casing over the new window.
About the Author
Bill Robinson comes from a long line of carpenters and contractors in Indiana, and his grandfather and other relatives built grain elevators across the Midwest. Before he took up the family trade as a second career, Bill was a commercial diver on deep-water oil rigs. Bill and his wife, Kathy, spend their free time in New Orleans, where they enjoy the local music, food, and culture.