An insert window is a great option when you re happy with the size shape and operating style of your existing window.
Insert windows for existing vinyl windows.
Insert windows preserve the original frame exterior trim exterior siding and interior casing.
Add skylights to let in additional daylight.
The window insert to the rescue.
Push them into the opening inside your existing windows to create an insulating pocket of air.
Sliding windows slide open horizontally saving space while offering a clean modern design.
Just to get it out there you could use them but only after you remove the vinyl window completely and install them like it was new construction.
The extrusions of the vinyl windows would not allow that.
If they re rotten or badly out of square the whole unit including the frame may need replacing.
Write down the measurements and use the smallest measurements for width and height to buy your new window.
Energysavr window inserts are effective interior window insulation panels.
Necessary when existing window frames are old and deteriorating.
One solution that has been around for a while is the window insert an acrylic window that fits inside your existing windows often held in place with snap.
You have two choices for vinyl replacement windows.
Next measure the width at the top middle and bottom.
Your question if you can use replacement windows would be no.
Insert windows install directly into the existing frame of the window being replaced allowing you to get the latest window performance features while minimizing disruption to your home.
Fix it with a replacement window to seamlessly match the existing windows in your home.
However before deciding to tackle the how to install replacement windows job yourself check the condition of your existing window frames.
Keep the cold air out in the winter.
Replace the entire existing window down to the house frame.
To do it that way would be a little counterproductive.
This is a much bigger and more complicated job than installing a vinyl window insert and may require a pro.
More advanced project because you have to remove interior and exterior trims and sometimes the siding.
They will stop drafts dust air infiltration.
Full frame windows and insert windows.