What is the difference between:
Replacement Window and New Construction Window?

Replacement Window

Replacement windows are designed to fit inside the existing window frame once the original window sashes are removed; there is no need to remove the interior casing and exterior casing. This makes for a very neat and faster installation.

The replacement window option will allow you to get latest window performance features while preserving the original frame, exterior trim and interior casing.

New Construction Windows

New construction windows require the entire window frame to be removed along with all interior casing and all exterior casing as well. Therefore the opening can be enlarged/diminished to create more replacement options. All the interior and exterior casing (trim) will be replaced.

If you would like to change the size or shape of your window, the new construction will be the appropriate option.

Sash, frame and trim removed .

New window it is inserted on a new frame and new trim built