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How to Replace a Window in Stucco

Removing a window from a stucco wall can be a challenging and time-consuming process for those unfamiliar with making their own home improvements. Removing windows held in place beneath the stucco requires some physical effort, although the process is simple to follow. The most difficult steps involve cutting into the wall with a skill saw, prying out the window and keeping the new window level during installation.

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Window Curtain
  1. Measure and mark two inches out from each corner around the exterior of the window. Use a chalk line to connect the corners in a square or rectangular shape, depending on the design of the window. This shape will look like a larger window that is a total of four inches wider and four inches longer than the actual window. The borders of this shape are directly over the nailing flange beneath the stucco.

  2. Cut into the stucco along the border around the exterior of the window using a skill saw with a diamond blade. Set the blade depth enough so it cuts the metal mesh beneath the stucco. For most windows installed in a stucco wall, this depth is between 0.50 and 0.75 inches.

  3. Hammer a chisel into the cuts of the border around the window to loosen it from the wall, then pry away the stucco from around the window to expose the nailing flange.

  4. Use a nail bar to pull out the nails from the nailing flange on both the interior and exterior of the window.

  5. Use the nail bar to pry away the trim from the interior of the window.

  6. Pry the window out of the wall using the nail bar, pulling the window toward the interior of the house.

  7. Set the new window in place and use a level to verify that if is plumb and square. If necessary, wedge wooden shims into place along the sides of the window to make it level.

  8. Nail the new window into the nailing flange on the upper right side and set a nail downward along the vertical right side every four to six inches, depending on the size of the window. Use a level to verify that the window is still plumb and square. The window may appear slightly crooked because it is only attached to one side of the nailing flange.

  9. Nail the new window into the nailing flange on the upper left side and set a nail downward along the vertical left side every four to six inches. Use a level to verify that the window is plumb and square. The window should now appear centered in the nailing flange.

  10. Use a caulking gun to apply caulk around the sides of the nailing flange.

  11. Nail the trim into place around the interior side of the window frame.

  12. Staple a layer of felt over the empty space on the exterior of the window where the stucco was removed to create a foundation for the new stucco.

  13. Nail metal mesh into place over the felt to provide a frame for the stucco.

  14. Apply the new stucco onto the metal mesh.

About the Author

Chris Passas is a freelance writer from Nags Head, N.C. He graduated from East Carolina University in 2002 with a bachelor's degree in journalism. He has written online instructional articles since September 2009.