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How to Replace Window Panes

A damaged or cracked window can cause a lot of trouble. This can be an opportunity to upgrade to energy-efficient windows or insulated ones to enjoy benefits such as improved comfort, higher resale value and reduced utility bills.

You can do it yourself for a only a fraction of the cost it would cost to hire an expert. It requires the right equipment and an hour or two of your time.

Glass

Replace window pane your old single-paned windows with tempered insulate glass to improve energy efficiency, reduce noise, and maintain the original character of your old home. The process of replacing windows is easy and can be accomplished by most homeowners who possess basic hand tools. In addition to a replacement double glazed window pane, the following items are required for the replacement glass for windows process: latex glazing putty pliers, glazier's points and the use of a heat gun to warm the old putty, if needed. Wear safety glasses and gloves prior to starting. Working with broken glass could result in serious injuries.

Take away any broken glass pieces that remain. This is best accomplished with a pair of pliers, though using a flathead screwdriver can also be effective in the pinch. Use a wood chisel, or putty knife to get rid of any old putty remaining around the frame and window sash. Be careful and slow making sure not to damage the old window sash. It is best to do this on a sturdy ladder rather than the ground and have someone stand below the sash to help hold it steady.

After you've removed all the old putty, prepare the window frame to fit the new pane. To allow for seasonal expansion or contraction by subtracting 1/8 inch from the measurements of width and height. Bring these measurements to a hardware store or home center, and get a piece of stock glass cut to size. You can also cut the glass by yourself if you have the appropriate tools.

After installing the glass, apply a small amount of caulking on the edges. This will make the glass weatherproof. Install a glazier's pointing on both sides of the frame. This will help secure the pane. The points shouldn't be so tight that they cause friction between the sash and frame but they shouldn't be too loose.

Before putting the putty on, make sure to knead it until it is smooth and free of lumps. Then, roll it into pencil-size strips. The first strip should be placed in the corner of the frame, moving from one corner to another to ensure it is even and smooth.

Glazier's Points

The glazier's points are tiny triangular metal pieces that help secure the glass into the window frame without damaging the delicate surface. It's simple to learn how to use this nefarious tool, and you'll be able to save money on the cost of an installation by a professional.

After the old putty and the glazier's points have been removed and the frame is thoroughly cleaned with a knife to remove any remaining residue. If needed, lightly sand the wood along grooves of the rabbets to smooth out rough areas. If you do sand the wood, ensure you protect it by using painter's tape to prevent accidental damage.

Measure the empty frame's dimensions and write down accurate measurements. Take these measurements to a hardware store or home center and have the new pane cut slightly smaller than the frame's opening. This will ensure a secure fit and leave room for expansion and contraction.

Insert the new pane into the frame and push firmly using your hands. Then use the point of your chisel or back end of the putty knife to pierce the glazier's points, as illustrated in Figure 11. When you're done taping, they should be flush with the top edge of the pane, and the raised shoulders of the points should be just below the rabbet's rim groove.

Apply a small amount of glazing compound on the edges of the glass that has been made and into the rabbet grooves, to seal and protect them. Allow it to dry and cure completely.

Install the new window sash after the glazing compound has dried. First, saturate the wood with a heavy coat of linseed oil. This will prevent the new putty from sucking up moisture and deteriorating and cracking over time. Apply the coating using a brush this coat, or even the tip of the putty blade. Then, use the chisel on the back of the tool or the back of the putty handle to gently smash the new sash or glazier's point into grooves of the rabbet. Repeat this process every 10 inches around the frame's perimeter.

Putty

A hurled baseball or a rock that is errant or falling branch could cause a window to crack or break. Fortunately, the majority of windows can be repaired by simply putting a new piece in the proper place. The glass is held in place by small clips made of metal called the glazier's pointed and putty, also called glazing compound. Remove the old pane and clean the area with the rag, a pull-type scraper or wood chisel. Wear gloves and safety glasses while working. If the window is secured to the frame, you'll have to make use of a heat gun to soften the adhesive before cutting it loose.

If you're planning to reinstall the original sash, take off the molding that holds the old pane. Sand the sash until it is flat and ready to receive new caulk. After the sash has been put back in place, you can apply a silicone caulk over the glass. This will ensure that it won't leak over time or discolor.

Take the glazing points out of the rabbets, the grooves in the sash that the glass is. If they're hard to chisel, use a hand tool such as a heatgun over them for a few minutes to soften them. If you're using a heat gun, Replace window Pane be cautious not to cause damage to the railings or sash by holding the tool too closely.

Make the bed for your new pane after removing the old putty and glazing points. Roll a rope of glazing compound between your hands, forming it into a 1/2-inch thick. Then, push it into the rabbets, where the glass will sit. It is crucial that the glass sits on the putty in all places on both sides, so if you need to, lightly tap the glass into the rabbet using your thumb.

If the new pane has a crack you can fill it with a solvent-based glass glue or silicone caulk before pressing it into the sash. If the crack isn't sealed, you will require putty to keep water from getting in. Once the putty is dry, wipe the oily film off the glass and let it dry completely before you paint. Paint before the putty has dried completely. It will not form a good seal and could be leaking or discoloring over time.

Paint

If you've experienced a broken window pane, you might be worried about the cost of replacing it. But the truth is that replacing a single glass pane doesn't need to cost a fortune when you do it yourself. Even a double-paned window can be replaced for a fraction of the price it costs an expert.

First, if you're working on a large window, make sure that it is securely fixed to the frame. This can be done relatively easy and quick with the appropriate tools and techniques.

When you are ready to begin, remove the old window pane. Take out the glazing points made of metal that are attached to it. These are small metal triangles which act as "nails" that hold the window in place. They are submerged beneath a glaze putty or bead that sets to form solid wedge which holds the wood frame firmly in position and hides the sharp edges.

After you have the old pane removed, clean up the surrounding frame and wood. Scrape off any old paint and sand down the rabbet grooves that the glazing points were. These should be sanded down to bare wood so that you can paint them the same shade as the rest of the frame. After the sanding process, apply a coat of flax oil to the wood's surface to help extend its lifespan.

The next step is to determine the width of the window opening. It is necessary to take horizontal and vertical measurements of the entire opening, and also the thickness of the old pane. To get the exact size of the new pane subtract 1/8 inch from both measurements. This will also allow for expansion and contraction of the glass in times of seasonal change. You can bring these measurements to a hardware or home improvement shop and have the glass cut for you.

Now, it's time to bed the new window pane. To do this, place the pane inside the frame and move it around until a 1/16 inch of putty remains between the edge of the glass and the sash on all four sides. Use a putty knife to smear the putty evenly, making sure that there isn't an excessive amount of excess putty in the corners and along the edges. When the putty dries, it can be painted with the same color as the frame to prevent water and air from leaking into the frame and causing fogging.