How to Install a Window Sash Replacement Kit Part 2 How to Install a Window Sash Replacement Kit Part 2

What You'll Need
Claw or carpenter hammer
Crow bar
Utility knife
Spray foam insulation
Jamb liner brackets

In the first part of this guide to installing a new window sash replacement kit, you learned how to take out the stops on your old window sashes and remove the top and bottom parts of the sash. Now you will need to remove the sash pulleys in order to fit new sashes, add insulation to weight pockets, check the jambs and do repairs, install weatherstripping and jamb liner brackets, and refit the stops. In the last part of the guide, you will learn how to fit the window sash replacement pieces and install the window correctly.

Step 1 - Remove the Pulleys

Once you have removed the window sashes, you can unscrew any hardware such as the sash cord pulleys. These are usually screwed into place, and can therefore be easily removed by using a screwdriver. Place the screwdriver into the screw holding the pulley into the wall and slowly unscrew. Be prepared to catch the pulley once the screw has been loosened, as they can jump down from the bracket. If the pulley is tightly embedded into the wall, you may find that you need to use your crow bar to pry out the metal. Remove any other jamb hardware at the same time and discard either to the garbage or to recycling.

Step 2 - Add Insulation

You will then need to add insulation to the areas which will not be used any more. In order to fit this insulation, you may choose to use small pieces of fiberglass or you could use a spray foam. The latter is better where the holes are small. Push the nozzle of the spray can into the hole, and spray until you have filled up the hole to the top. Leave to dry.

Step 3 - Check and Install Jamb

Before you install the new hardware on your jamb, it is a good idea to run your fingers along it and check for any weaknesses or disfigurements. You may find that the jamb has become warped, in which case you should replace it with a new jamb, or has shifted out of position. In the latter case, use a spirit level and some shims to restore the jamb to a level position. Remove excess shim length, and then add jamb liner brackets. Use a tape measure to calculate how far apart these brackets need to be placed, and then screw into the wall using a screwdriver. The ideal placement is one bracket for every 2 inches down each side.

Step 4 - Add Weatherstripping and Stops

Take your weather stripping, place these into the brackets, and then add your weatherstripping over the edge of the frame. Nail into place using finishing nails, hammering in as deeply as you can. Take the stops which you removed earlier and drive them back into place. You may find that a small nail punch is the best method of driving the stops back into place.

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