Things You'll Need
Instructions
Remove an old window from the existing opening.
Either measure the existing opening and write down the measurements, or take the old window with you when you go to purchase the new window kit.
Purchase the new window kit, take it home, unpack it, and perform any pre-installation assembly that may be necessary, following the instructions included with the window kit. See Tips for more information.
Remove the existing window(s) from the opening(s), and prepare the opening(s) to receive the new window(s). Remove all old caulking and/or glazing material, make any repairs to the frame or surrounding structure that may be necessary, and make sure all surfaces are smooth, clean and dry. See Tips for more information.
From the inside of the room, put the new window into the existing opening. Check to see that all parts of the window are level and square; make any necessary adjustments.
Drill holes for the fastening hardware 6 inches from each corner of the part of the window frame that will hold the fastening, and 12 inches from the center part of the window frame that will hold the fastening.
Use the mounting hardware to attach and secure the replacement frame.
Apply glazing beads to each glazing bead slot, making sure all slots have been filled.
Repeat Steps 5 to 9 for each replacement window.