How to Replace a Quaker Window

Measure the height and width of the window from the outside of each jamb. Measure in three locations for the width -- left, right and center. For the length, measure top, center and bottom. This ensures the window is straight. Use the smallest measurements to order the window. Wait until you have the window before you remove the old window.

Remove the molding with a crowbar or hammer. A hammer or crowbar will pull off molding that has been nailed or glued in place.

Lift the window panes out of the window. This is done in several ways, depending on the type of window. For vertical windows, push the levers at the top of the window pane into the center and pull the window out. Slide the window up and out of the frame. For sliding windows, unlock the lever at the top of the pane and slide the pane so it is open halfway. Lift the pane up and out of the frame.

Unscrew the screws on the inside of the window frame. Have an assistant hold the window steady as you work. Some windows are nailed in place so the nails will need to be removed.

Lift the window out of the opening once all the screws are out. Have an assistant help you.

Vacuum the debris out of the window opening.

Remove the panes from the new window as you did with the old window. This makes the window lighter and easier to handle.

Lift the window up into the opening with the help of a friend.

Adjust the window so it has an equal amount of gap on all four sides. Use shims to hold it in position. Level the window using a spirit level. Ensure the window jambs are flush with the wall by holding a straightedge against the wall. Adjust the window accordingly.

Predrill the window fins through the existing holes. Use a drill bit that is as long as your screws.

Insert anchoring screws into each hole and attach the window to the house. Double check that the window is still aligned as you work.

Work backer rod or foam insulation into the wide cracks on the inside of the home. Cut to fit with a utility knife.

Apply expanding foam sealant into the wide cracks on the exterior of the home. Fill the gaps from the back to the front. Allow the foam to expand and fill the gap. Cut any remaining sealant with a straight blade.

Caulk the window edges with window caulk in a caulking gun. Smooth the caulk with a wet finger before it dries.