All vinyl windows are also available in “New Construction” type applications. Vinyl New Construction type windows are used when the original window frame and sash are removed from the home, as opposed to a vinyl replacement Window, which is installed in place of the original window sash while utilizing the original window “frame”.
New construction windows are also used when a window is to be placed in a wall where no window opening previously exists, or when an existing window opening will be framed to be a different size than the original window size. In short, new construction windows are used in any application where there is no original “window frame” to install a replacement style window into.
Differences Between New Construction and Replacement Style Windows
The major difference between a New Construction window and a Replacement style window is in the window frame.
The exterior of a new construction window frame has a pre-slotted integral nail fin (mounting flange) built into the exterior of the frame. Nail fins are available in traditional style “L”-fin, which is covered when the new exterior trim is applied, and the newer style “J”-fin, which has a built in “JJ” channel to be used in conjunction with vinyl siding installation.
The interior of a new construction windows has a receiver channel built into the window frame. The receiver channel accepts the wood extension jambs, which are available in pre-primed or clear pine. Extension jambs are used to extend the window depth to the exact thickness of the house wall, and interior trim is then applied to finish off the interior of the window.
After a New Construction window has been installed and finish trimmed inside and out, there is virtually no difference in appearance between the new construction window and a replacement style window. You can install one of each on the same wall, in the same room, and not be able to tell the difference.
