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How Do I Replace My Old Windows With a New One?

Before you begin your window replacement project, you should make sure you have good measurements of the opening. You can do this by measuring the distance between the left and right jambs of the top of the window, as well as the width and height of the head jamb and sill on the far left side. Using a utility blade or handsaw, remove any pieces of trim around the opening. You can have a window company do it for you and get an estimate if you are interested in hiring someone. Visit: for further information.

If you have a wood frame, the window sash and stop will be slightly smaller than the window jamb opening. Make sure to check the frame for squareness and straight sides. If your window is positioned too loosely, you can readjust it in the frame by removing the stops. You can also use shims to make sure the window frame sits level and square.

Before installing your new windows, make sure you measure the depth of the opening. If you have to replace double-hung windows, you need to remove the heavy pocket weights that hold the window frame. These weights are typically made of lead. The lead should be disposed of properly. Check with your community for procedures on how to dispose of lead weights. Most communities have a drop-off center where you can drop off the weights.

If the window is wooden, use a utility knife to slice through the paint and caulk on the inner window sash. Use a flat pry bar to remove the casing from the window frame. You should then separate the inner and outer windows from the sashes by cutting them at their stops. Then, remove any sash cords from the sash frame. If the old window is flanged, use a sawzall with a metal-cutting blade to remove the flanged portion of the window. Then you can remove the rest of the hardware, including the blinds and trim.

Installing replacement windows is a major expense for a home. It is essential to understand the impact of replacement windows on the environment and on your wallet. It’s also important to note that original windows cannot be returned to you – landfills have a strict policy against “no returns.”

Replacement windows are made to retrofit older windows, and some are more energy-efficient than others. However, replacement windows will not drastically reduce your heating bill – the R-value of the most energy-efficient windows is around four or five. The average single-glazed window has a R-value of around two. However, the window’s area is only a small portion of the wall space, so it’s better to invest in additional insulation and sealants instead.


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