Install a Replacement Window – Lowe’s

Old, single-pane windows waste energy, require a lot of maintenance and they're often too difficult to operate. New, vinyl replacement windows are at the opposite end of the spectrum. They have many energy-efficient features, are virtually maintenance-free and operate smoothly for years. Do yourself a favor: Replace those old, inefficient windows with new ones today. Installation only takes about 45 minutes per window, and you probably have all the tools for the job.

It's important to have accurate measurements for every window in your home. Accurate measurements ensure that your windows fit properly for maximum energy savings and easy installation.

Take all measurements from inside your home. Using the smallest measurements ensures that the replacement window will fit inside the existing window frame.

To find the width, measure from the inside of the jamb on one side of the window to the inside of the jamb on the other side of the window. Measure at the bottom, middle and top of the window. Use the narrowest measurement for the width of your replacement window.

To find the height, measure from the top of the sill to the bottom of the window's head jamb. Measure at the left, middle and right of the window. Use the shortest measurement for the height of your replacement window.

Since the replacement windows fit inside the existing window frame, you only have to remove the sashes, parting bead and inside stop from the existing window. To make the project easier and safer, install your new windows from inside your home.

Remove the inside stop pieces from the window. Take care when removing these pieces; you'll reuse them when installing the new windows.

Remove the inside sash. If the old window uses weights, cut the sash cords or chains. Let the weights fall to the bottom of their wells, and simply leave them there.

Slide the outside sash to the bottom of the window. Remove and discard the parting beads. Remove the outside sash in the same manner as the inside sash. Don't remove the exterior stop from the window jambs. These stops will retain the replacement window when you install it.

Clean the window jambs and sill thoroughly. If the old window had weights, either drive the pulleys into the frame or remove them entirely. Fill any holes in the jambs or sill with caulk.

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Install a Replacement Window - Lowe's