For these to work the existing window frame must be level and square.
Installing a vinyl replacement window.
This is a much bigger and more complicated job than installing a vinyl window insert and may require a pro.
An insert replacement window consists of a fully assembled window in a ready to install secondary frame.
Now that the window is out of the wall check the window jamb and the window stop for structural damage.
Sometimes called a pocket window an insert replacement slips into the existing opening and is then fastened to the old side jambs.
Replace the entire existing window down to the house frame.
Necessary when existing window frames are old and deteriorating.
When replacing an old window with a vinyl replacement window you will no longer need storm windows or separate screens.
You have two choices for vinyl replacement windows.
Either type of replacement window must be installed in a solid rot free jamb.
Then pry out the parting stops at the tops and sides of the window and remove the top.
Center the new window in the opening supporting it with wood blocks and shims placed below the horizontal jambs.
How to install vinyl replacement windows.
Installing a full frame replacement window for example is more complex than installing an insert replacement window.
Wood or vinyl replacement inserts on the other hand are self contained units with their own jamb and sash and can therefore be slid into almost any type of window jamb.
If they re rotten or badly out of square the whole unit including the frame may need replacing.
Replace any damaged areas before installing windows.
More advanced project because you have to remove interior and exterior trims and sometimes the siding.
If there are screens or storms mounted outside the house remove them first.
Remove old storms or screens.
Download a pdf of these instructions.
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Installing a vinyl replacement window is relatively straightforward and you can do it in an afternoon provided you have the right tools.
Full frame windows and insert windows.
Make sure the window is plumb and level and adjust the shims if necessary.
They are available as double hung sliding or casement style windows.