You may want to replace a window if the glass has been damaged, you’re remodeling a room, or you want to upgrade your energy efficiency as well as your style by getting rid of those drafty single panes that are losing you money. When replacing a window, you can remove and replace the entire window down to the house frame. This method is best if the existing frame is damaged or deteriorating, but requires construction skills and know-how and will take more time and money. An easier and less expensive option is to install an insert replacement window into the existing frame. Insert replacements are only an option if your window frame is in good condition without rot or damage.
When replacing an entire window, first you’ll carefully remove the existing window with a pry bar and other tools. Next, you’ll make any repairs and adjustments needed to the existing frame or header and studs to ensure that the space is perfectly plumb and square, so the new window will sit perfectly within the space. Next, install the new window from the exterior, securing it into place. You’ll need to precisely wrap and insulate the window to ensure it doesn’t leak. Then, install the interior casing and exterior trim (as needed). If you prefer to hire a professional to install a window, consider replacing more than one window at a time, as the pro can work more efficiently.