How to Repair Double-Hung Windows

Double hung windows need repairing from time to time. These windows have weights attached with rope on each side of the window that keeps the window balanced. The rope goes over the pulley up into the upper track of the window. When you raise the window the weights drop down a channel inside the window. This counter weight helps to balance the window and hold it place. Eventually these ropes will need replacing and your double hung windows may need other repairs. Here are some tips for how to repair double hung windows to help you.

The first thing you need to do is collect the tools and supplies you need for your repair job. You are going to need a screwdriver, utility knife, hammer, pry bar, rope or sash cord, finishing nails and some WD-40.

Your next step is to use your pry bar to remove the parting strip as well as the interior stops off the double hung window. If the stops are sealed on with paint, use a utility knife to detach the stops.

Next remove the bottom and top sashes and remove the sash cord by cutting them away with a utility knife.

Then use your screwdriver to open up the access panel that is located in the window's jamb. Remove the weights from the cavity in wall along with old cord, pulleys and weights. Spray WD-40 on the pulleys to keep them well oiled.

Your next step is to replace the window cords. Thread your new nylon cords through the wall and then through to the window's access panel. Tie the ends of the cords to weights and replace the bottom part of the cavity in the wall.

Pull the cords very taut and then cut the cords approximately four inches from the top of the pulleys. Knot the cords and then push the cords into the window slots on both sides of the window sash. You need to make certain that the knots still allow the window sash to move up and down the window jamb without being impeded.

Next replace the window sashes in your double hung window. Nail a parting strip in the slot for the top and bottom sashes, and the replace the access panel as well if necessary. You need to be certain that the window slides well. For smoother sliding, rub wax along the edges of the top and bottom window sashes.

Finally, use your hammer to nail the stops back into place. You don't want the stops to rub up against the sashes, but the stops should hold the sashes firmly into place. Your double hung window is now repaired.