Get Protection First
Get some protection along with the tools needed. Make sure you wear safety goggles and workers’ gloves to protect your hands.
Image Courtesy: dickblick.com
Start with Stripping Wood
Strip the wood that holds the window sash. The sash is a combination of frames which hold the glass in the window. Most windows have lower and upper sashes. Remove the paint seal along the seam with the help of a utility knife.
Image Courtesy: thisoldhouse.com
Next use a flat bar to remove the stops wooden stops that hold the sashes. Work one each of the stops gently and work until they become loose. Soon they will be loose enough to be removed altogether.
After the stops have been removed, remove the window sashes. If they are stick with the paint, use a utility knife to remove the paint.
Image Courtesy: diyadvice.com
Remove Interior Trim
Next remove the interior trim of the window. This should expose the nails that are holding the frame in its place. Remove the casing or the trim from all sides carefully using a flat bar.
Remove Nails from the Jamb
Next step is to remove the nails that go through the jamb into the framing of the window. Do cut the side jamb from the window sill. Make sure that you leave the sill in place as it will be needed for the replacement window to be installed.
Image Courtesy: familyhandyman.com
Prey the casing loose at the external part where it joins the front edge of the window jamb. Cut away the nails that hold the jamb in place with a saw.
Use a flat bar to remove the head and side jambs from the window’s opening.
Remove Leftover Nails
Pull out any nails left in the window sill with a pair of pliers. Sand the window sill and opening to make them smooth.
Image Courtesy: hgtv.com