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How to Replace Window Panes

A damaged window pane could be a nuisance. It could be a chance to upgrade to energy-efficient double glazed windows replacement or insulated ones and enjoy benefits like increased comfort, higher resale value and lower utility costs.

You can do it yourself for a only a fraction of the cost it would cost to hire an expert. You only need the right tools and a few hours of your time.

Glass

Replace your single-paned windows using tempered or insulated glass to increase energy efficiency, cut down on noise, and protect the historic integrity of your old home. Most homeowners with basic hand tools can repair the window pane. In addition to a Replacement Window Panes pane, the following components are required: latex glazing putty; Glazier's points; pliers and an electric heater to warm the old putty if required. Before starting, put on gloves and safety goggles as working with broken glass can cause injuries.

Remove any broken glass pieces remaining. This is best done using pliers, though using flathead screwdrivers can be used in the pinch. Then, use a wooden chisel or putty knife to remove the rest of the old putty from the frame and sash. Take your time and work slowly and be careful not to break the existing window sash. This should be done on a ladder, not the ground. Also, you should have someone lower to hold it steady.

After you have removed all the old putty, it is time to prepare the window frame to accommodate the new pane. Take measurements of the width and height of the opening in the sash and subtract 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be taken to an hardware or home centers store to get a piece cut of stock glass to the right size. You can also cut the glass by yourself if you possess the appropriate tools.

After putting in the new glass After installing the glass, apply a small amount of caulking on the edges. This will make the glass weatherproof. Then, place a glazier's tip on the frame's opposite side to secure the pane into its place. The points should not be too tight that they create friction between the frame and sash however they should not be loose.

Before putting the putty on, work it in a gentle manner until it's soft and free of lumps. Then you can roll it into pencil-sized strips. Apply the first strip in the corner of the frame, moving from one corner to another to ensure it is smooth and even.

Glazier's Points

The glazier's points are small triangular metal pieces that allow glass to be secured to the frame without causing damage to the delicate surface. Learning how to use these hidden tiny helpers is simple and could save you money on a professional installation or the cost of new glass.

After the old putty as well as glazier's points are removed Clean the frame thoroughly with a utility knife to remove any remaining residue. If necessary, lightly sand the wood along the grooves of the rabbets to smooth rough areas. If you decide to sand the wood, make sure to protect it by using painter's tape to prevent accidental damage.

Take measurements of the empty frame and write down accurate measurements. These dimensions can be taken to the hardware or home center store, and the new pane will be cut to a smaller size. This will ensure that the pane fits comfortably and allows for expansion and contraction.

Place the new pane in the frame and press it into the frame with your hand. Use the chisel's point or the back of the putty knife to tap the glazier's points as illustrated in Figure 11. The glazier's point should be aligned with the top edge of your pane and the shoulders should be just below the lip.

Apply a thin layer of glazing compound on the rabbet grooves and edges of the glass. This will protect and seal the edges. Allow it to dry and cure completely.

Once the glazing compound has dried and the glazing compound is dry, you can install the new window sash. First, saturate the wood with a heavy coat of linseed oil. This will prevent the newly-created putty from drying out or cracking as it absorbs moisture. Apply this coat with a brush or the edge of your putty knife, then use the chisel or the back end from the putty knife to gently hammer in the new sash and glazier's tips into the grooves of the rabbet. Repeat this procedure every 10 inches along the perimeter of the frame.

Putty

A hurled baseball or an unintentional rock, or a fallen branch can cause a window to break or crack. Luckily, most windows can be repaired by simply putting a brand new piece in place. The glass is held in the position with a tiny metal clip, referred to as the glazier's point, and putty. This compound is also called glazing compound. Remove the old pane and clean the area with the rag, a pull-type scraper or wood chisel. Wear protective glasses and gloves 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 taking it off.

If you plan to reinstall the original sash, gently remove any pieces of molding that hold the old pane in place. Sand the sash until it is flat and ready to receive new caulk. After the sash has been re-installed, apply a new silicone caulk to the glass to ensure that it won't leak or discolor as time passes.

Take out the glazing points in the rabbets. These are the grooves on the sash where the glass is. If they're difficult to work out, try holding a hand tool like a heat gun over them to soften them first. If you're using a heated gun, be cautious not to cause damage to the railings of the sash or the sash itself by placing the tool too tightly.

Make a bed for your new pane after removing the old putty and glazing points. Roll a rope made of glazing compound between your fingers and make it about 1/2 inch thick. Then, you can press it into the rabbets, where the glass will sit. The glass must rest against the putty on both sides. If necessary gently tap your glass into the rabbet using your thumb.

If the new pane is cracked, you can use a silicone caulk or glass glue based on solvents to cover the crack before pressing it into the sash. If the crack is not sealed, you'll need to use putty to keep the water out. After the putty has dried and the film is oily, wipe it off the glass with an abrasive and allow it to dry completely prior to painting. Paint after the putty has completely dried. It won't form a good seal and may be leaking or discoloring over time.

Paint

You might be worried about replacing a broken pane of glass. But the truth is that replacing a single glass pane doesn't need to cost a fortune If you can do it yourself. Even a double glazing windows replacement-paned window can be replaced for a fraction of what it would cost for a professional.

If you are working with a large glass window first ensure it is securely fixed to the frame. This job can be made relatively simple and fast with the appropriate tools and techniques.

Once you're ready to begin taking off the old window sash replacement pane by prying out the glazing points of metal that are attached to it. They are basically tiny metal triangles that act as "nails" that hold the window in within the frame of wood. They are submerged under a bead of glazing putty that is then cured to form a solid, formed wedge that holds the window firmly in place and hides the edges.

Once you have the old pane removed Clean up the frame and wood. Scrape away any old paint and sand down the rabbet grooves, where the glazing points used to be. These should be sanded to the point of being bare, 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 bare wood to help extend its lifespan.

Then, you need to measure the width of the window replacement panes's opening. You'll need to determine the horizontal and vertical dimensions of the entire opening, as well as the thickness. To determine the exact dimensions of the new pane, subtract 1/8 inch from both measurements. This will also allow for expansion and contraction of the glass during seasons of change. Take these measurements to the hardware or home improvement store, and they will have a piece 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.