However before deciding to tackle the how to install replacement windows job yourself check the condition of your existing window frames.
Insert windows for existing vinyl windows.
An insert window is a great option when you re happy with the size shape and operating style of your existing window.
To do it that way would be a little counterproductive.
If you need to stick to a tight budget you may want to look into vinyl windows.
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.
Next measure the width at the top middle and bottom.
Push them into the opening inside your existing windows to create an insulating pocket of air.
Energysavr window inserts are effective interior window insulation panels.
Insert windows preserve the original frame exterior trim exterior siding and interior casing.
Fix it with a replacement window to seamlessly match the existing windows in your home.
They will stop drafts dust air infiltration.
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.
More advanced project because you have to remove interior and exterior trims and sometimes the siding.
Necessary when existing window frames are old and deteriorating.
Add skylights to let in additional daylight.
Replace the entire existing window down to the house frame.
Sliding windows slide open horizontally saving space while offering a clean modern design.
You have two choices for vinyl replacement windows.
Your question if you can use replacement windows would be no.
This is a much bigger and more complicated job than installing a vinyl window insert and may require a pro.
The window insert to the rescue.
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.
Full frame windows and insert windows.
Keep the cold air out in the winter.
Even relatively new vinyl windows less than ten years old can suffer from seal failures and degradation from exposure to weather and may need to be replaced.