This story shows you how to install a replacement window sash.
This is a way to make an old drafty window behave like a new, energy-efficient model -- without changing its looks in any way. Also called jamb liner kits, replacement sashes are available in wood or vinyl. The liner on either side is vinyl but is barely visible when the sashes are installed.
To buy replacement sashes that fit snugly, measure the width of the window -- from jamb to jamb -- at the top, middle, and bottom. Use the shortest measurement. For the height, measure from the top jamb to the point where the lower sash meets the sill on the outside. Check that the frame is straight, square, level, and free of twist.
About 3 hours to remove old sashes and install replacement sashes with liners
Flat pry bar, chisel, framing square, screwdriver, drill, tape measure, angle finder (see Step 1), hammer, tin snips
Measuring accurately, removing trim pieces, stuffing insulation, caulking, assembling pieces
Follow manufacturer's instructions for measuring and installing.
Replacement sash kit, caulk