How to Replace Vinyl Windows in a Building

Vinyl windows are much more easier to replace than regular wood windows or large casement windows. Some vinyl windows, specifically vinyl replacement windows, are even made for the purpose of a simple installment. Follow these steps for a quick and secure installation of vinyl windows.

What you will need:

• New vinyl window


• Tape measure


• Small pry bar


• Silicone caulk


• Caulking gun


• Wood shims


• Drill


• Level


• Spray insulation

1. Measure the height and width of the casing to determine the size of new vinyl window after removing the outer trim of the currently installed window. Do not remove the window from the casing until you have received the new window.


2. Inspect and clean the window casing before installing the new window. 


3. Remove the old caulking and insulation.


4. Search for and remove broken nails or screws.


5. Lay a thick layer of silicone caulking around the casement.


6. Lift up the new vinyl window into the opening and center it.


7. Place a small level on the vinyl window to mark where the shims should be placed.


8. Place a screw in the upper right-hand corner then check for plumb and level.


9. Use 3-inch screws and secure into the four holes on each side.


10. Cut off ends of the shims.


11. Locate cracks in the edges of the window and spray the foam insulation. Be sure not to spray too much foam insulation in order to avoid warping the window.


12. Apply a thin bead of caulking and spread it out.


13. Place trim boards on both the interior and exterior of the vinyl window.