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Learn how to remove an old wood double hung window and install a vinyl replacement window.
Vinyl windows, replacement windows, how to install windows, installing vinyl replacement windows, double hung windows
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Last week I told you how to measure your wood window openings to properly order your new vinyl replacement windows. This week I’m going to explain how to remove your old windows. The vast majority of wood sash double hung windows in America have the same specifications. Starting from inside the house and working out, you have a wood stop approximately 3/8″ X 3/8″. Then comes the lower sash (the sash is the piece of glass and surrounding wood frame). Then you have another wood stop (called a parting bead) between the lower sash and upper sash. This stop is approx. 1/4″ X 1/2″. Then you have the upper sash, and finally, the outside wood stop (called a blind stop) that is approx. 1/2″ X 3/4″.
Before beginning, be sure to wear safety glasses and gloves. The safety glasses will protect your eyes from debris, and the gloves help avoid splinters. The inside stop needs to be removed first. Try not to damage these,they will be re-installed after the replacement windows are put in. If you should happen to crack the old stops, you can take a piece to a hardware store or molding store to get replacement wood stops. If the stops have been painted to blend into the surrounding trim or wall, you need to put a flat screwdriver or putty knife into the indented area that separates the stop from the surrounding area. Drag the blade from top to bottom to chip away the paint. Then put a stiff blade putty knife into this seam and pry the stop away from the frame. Start in the middle of the stop where there is the most flexibility. Work the putty knife from the middle to the top, then from the middle to the bottom. The number of nails that were used to install the stop will determine how difficult removal will be. I have seen some stops that have just 3 nails, while others have had 6. Most of the time there will be stops around all four sides of the opening, but I have seen some openings that didn’t have a top stop, and others that had no bottom stop.
After the inside stops have been removed, you should be able to pull the lower sash out. If the windows were painted shut at some time, you might have to pry the area where the lock is located to separate the sashes. Now, once you get the lower sash out, it will still be attached to the cords that hold the window up when you raise it. Take a pair of tin snips and cut the cords while maintaining tension on them. The cords will recoil back into the assemblies. Take the lower sash and set it aside.
Next,we need to remove the middle stop, or parting bead. This piece is going to be thrown away, so you don’t have to be careful when removing this piece. The parting bead will be on top and along both sides. It’s never on the bottom. Take a screwdriver and tL2L it into the groove between the side frame and parting bead. Pry out. The bead is nailed into a recessed groove. When all of the parting bead is out, the upper sash will come out. If it’s painted to the outside stop, CAREFULLY pry the sash from the outside stop with a stiff putty knife. You want to avoid damaging the outside stop. Remove the upper sash the same way you did the lower sash, cutting the cords under tension.
At this point,you should have the inside stops removed and set aside to be installed later, both sashes removed, the middle stop or parting bead removed and discarded,and the outside blind stop left in place undisturbed. Check to make sure there are no obstructions in the opening such as nails,the metal tab at the bottom for holding in the old screen, etc. The final step is to take a stiff putty knife and scrape the inside face of the outside blind stops to get rid of any old caulking. This is the surface that the replacement windows are going to rest against, and we are going to want this area as smooth as possible. Clean up all loose debris from the opening, and you are now ready to install your replacement windows. That will be our topic for next weeks article.
John Rocco has been installing replacement windows since 1978. To learn more, visit How To Install Windows