Step One
Begin the window removal by taking off the wood trim surrounding the outside frame.

 

Step Two
Cut the sash cord on both sides of the old window. The lead weights will drop down inside the wall. Remove the bottom window. Now remove the sash that separates the two windows.Remove the top window.

Step Four
Jim checking height of old wood frame after old window was removed. Measure for new windows left to right first, and then top to bottom – all measurements are taken on the inside of the frame, as you see Jim doing here.

Step Five
Old frame openings are not always square. A little chiseling is sometimes needed to get a proper fit for the new window.

Step Six
Cut the exterior mounting/nailing fins from the new vinyl window with a utility knife. These windows will be attached through the side frame, so nailing fin is not needed.

Step Seven
Slide the new window into existing wood frame. After the window is in the opening have a person hold from inside while you check the fit.

Step Eight
A tight fit. Sometimes a little help is needed. Use a wood block to tap in the frame, don’t hit it directly, you could damage the finish.

Step Nine
Screw through the side rails of the vinyl window into the wood frame using long screws. Check with the manufacturer for placement of these screws. An angled sill spacer will be needed to take up the gap between the new window and sill. This spacer needs to be ordered separately. Most older homes with wood windows have an angled sill for water runoff.

Step Ten
Caulk between vinyl window and old wood frame. Even though new windows are energy efficient, caulking is still needed inside and out for weather protection. Next you’ll need to add molding. Pick a style that matches the era of your home. Size matters, use a stock that is not thicker than a 1/2”and wide enough to cover the unpainted exposed wood.