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New Construction Windows

New Construction Windows

NOTE:These installation instructions require that some type of weather resistant “house wrap” has been installed on the exterior of the sheathing prior to the installation of the windows. Installation directly against the sheathing is not recommended. Additional materials needed to complete the installation are: silicone caulking, 6” wide (minimum) membrane water barrier tape, shimming material, 1-½” galvanized or stainless steel screws or nails for installation.
Construction of the Opening
New construction window openings must be square, plumb, level, using materials that are free of warps, twists, etc. Check opening for squareness by measuring the diagonals as shown to the right. The opening is square if the measurements are the same. The opening should be ½’ larger than the tip to tip window frame size to allow for any necessary shimming.
IMPORTANT: Be sure the construction of the opening meets all applicable building codes and standards.
Preparation of the Opening

  1. Cut the house wrap material that covers the window opening using the modified “I” pattern shown to the left. Fold the wrap back into the opening, stapling it to the framing and trimming the excess material.
  2. Next make diagonal cuts in the house wrap 10-12” long at the two upper corners of the opening to create a flap that will go over the head of the window, as shown to the right. Tape this flap up and out of the way for now.
  3. Apply one strip of membrane tape along the edge of the opening at this sill as shown, extending it 10-12” past the corners. Apply a second strip overlapping the first one that turns into the opening, covering the sill plate. Run this strip up the sides of the opening for several inches as well, notching at the corners. NOTE – always be conscious of the sequence of these installation steps. Flashing is always applied from the bottom up, in “weatherboard” fashion.
Source: paradigmwindows.com
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