Replacing Panes

• To replace a broken window pane, begin by removing all of the old bits of glass. Wear gloves while you do this. Remove any old putty still sticking to the frame, using a utility knife, a scraper or a putty knife. Cut a new pane of glass to the same size as the opening. Set the new glass into the opening, and set glazier's points to hold it in place. These are small, triangular bits of metal that are pushed into the window frame along the edge of the glass. Fill in the seam between the glass and the window frame with glazier's putty, and smooth out the putty, using a wet putty knife.
  
  

Replacing Old Windows

• To remove old windows, begin by removing the interior and exterior trim around the perimeter of the window. Depending on how the window was installed, you may need to cut nails that have been driven through the frame of the window and into the frame of the building. A reciprocating saw is by far the easiest tool with which to accomplish this. When all the trim has been removed and the nails have been cut, you should be able to remove the old window by simply pulling it out of the opening.
  
  

New Windows

• Having new windows custom built to fit the openings from the old windows is an expensive way to go, but may be worth the money if you are renovating an older home and want to retain its historical character. Alternatively, you can find used windows at salvage yards and building supply stores for a fraction of what new windows cost, and modify the window openings to fit them. If your new windows are too small, you can fill in and insulate part of the window opening to make it smaller. If your new windows are larger, you can enlarge the opening by cutting out part of the frame and siding that surrounds it.
  
  

Single Pane Vs. Double Pane

• Double-pane windows are more efficient than single-pane. Most double-pane windows are built so that there is either a vacuum or an inert gas between the two panes of glass. This greatly reduces the amount of heat that can migrate out of your home through the window. However, a double-pane window that is improperly installed won't be very efficient. To make your home more efficient, you need both high-quality windows and competent installation to cut down on drafts and heat loss.