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How to Replace Window Panes

A damaged window pane can be an issue. It could be a chance to upgrade your windows to energy efficient or insulated ones and enjoy benefits such as improved comfort, increased resale value and reduced utility costs.

You can do it yourself at less than what it would cost to hire an expert. It requires the right tools and only an hour or two of your time.

Glass

If your single-pane windows are outdated, deteriorating or broken replacing them with more modern glass that is tempered or insulated can increase energy efficiency and reduce noise while maintaining the historical integrity of older homes. Most homeowners with basic hand tools can Replace window pane a window pane. You will also require an additional window pane, glazier's tips pliers, and latex glaze putty. If needed you can use a heatgun to warm the old putty. Before starting, put on gloves and safety goggles as working with broken glass may cause injuries.

Take away any broken glass pieces that remain. This is best done using a pair of pliers, but flathead screwdrivers can work in a pinch. After that, use a wood chisel or putty knife remove the remaining old putty around the frame and sash. Be careful to not damage the window sash. Work slowly and carefully. This is best done on a ladder, not the ground. Also, you should have someone on the ground to ensure it is held steady.

Once you have removed all the old putty, you can prepare the window frame for 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 have a piece of stock glass cut to size. You can also cut the glass by yourself if you have the appropriate tools.

After putting in the new glass After installing the glass, apply caulking to the edge. This will make the glass weatherproof. Install a glazier's pointing on both sides of the frame. This will secure the pane. The points should not be so tight that they create friction between the frame and [Redirect-302] sash but they should not be too loose.

Before applying the putty on the surface, you must knead it thoroughly until it is soft and free of lumps. Then make it into pencil-sized strips. Apply the first strip to the corner of the frame, working from one corner to the next to ensure it is even and smooth.

Glazier's Points

The glazier’s points are small triangular metal pieces that help secure the glass to the frame without causing damage to the delicate surface. Knowing how to use these tiny helpers is simple and can save you money on professional installation or the cost of buying new glass.

After the old putty and the glazier's points have been removed and the frame is thoroughly cleaned using a utility knife to eliminate any remaining traces. If needed you can lightly sand the wood in the grooves of the rabbets to smooth rough spots. If you do sand the wood, ensure you protect it by using painter's tape to prevent accidental damage.

Take the dimensions of the frame and record precise measurements. These measurements can be brought 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 snugly and allows for expansion and contraction.

Place the new pane into the frame and push it in place using your hand. Then, use the tip of your chisel, or the back of the putty knife to make a tap on the glazier's points as illustrated in Figure 11. When you're done taping, they should be in line with the top edge of the pane, and the raised shoulders of the points should be below the rabbet's lip. groove.

Apply a thin layer of glazing compound on the edges of the new glass and in the rabbet grooves to seal and protect them. Let it dry completely and cure.

Install the new window sash once the glazing compound has dried. First, saturate the wood with a heavy coat of Linseed oil. This will stop the new putty from drying out and cracking as it absorbs moisture. Use a brush to apply this coat, or even the tip of the blade. Then use the chisel on the back of the tool or the back of the putty handle to gently hammer the new sash or glazier's point into the grooves of the rabbet. Repeat this procedure every 10 inches around the frame's perimeter.

Putty

A baseball that is thrown, an errant rock or falling branch could cause a window pane to break or crack. Fortunately, the majority of windows can be repaired by simply putting a new piece of glass in its the right place. The glass is held in place with small clips made of metal called a glazier's point, and putty, which is often called glazing compound. Before installing a replacement pane, first get rid of the old one and clean up the area using an abrasive and the pull-type paint scraper or the wood chisel. Wear protective glasses and gloves while working. If the window is glued to the frame, you'll have to employ a heat gun in order to soften the adhesive before cutting it loose.

If you are planning to install 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. Once the sash is put back in place it is possible to apply a silicone caulk to the glass. This will ensure that it won't be leaking or fade over time.

Remove the glazing points from the rabbets, or the grooves in the sash that the glass is. If they're hard to chisel out, you can try holding an instrument like a heat gun to soften them up first. If you're using a heated gun, be cautious not to scratch the railings or sash by holding the tool too closely.

Make the bed for your new pane after you have removed the old glaze points and putty. Roll a rope with glazing compound between your fingers and make it around 1/2 inch thick. Press it into the rabbets where the glass will be put. It is essential that the glass rests against the putty in all places on both sides, so if you need to do so, gently tap the glass into the rabbet using your thumb.

If the new pane has cracked, you can use the silicone caulk or glass glue that is based on solvents to fill in the crack prior to pressing it in the sash. If the crack is not sealed, you'll need to apply putty to keep water from getting in. After the putty is dry and the film is oily, wipe it off the glass with the help of a rag. Allow it to dry completely prior to painting. If you paint before the putty is fully dry, it won't form a strong seal and may leak or discolor over time.

Paint

If you've had a broken window pane, you might be worried about the expense of replacing it. But the truth is that replacing a single glass pane doesn't have to break the bank when you do it yourself. Even double-paned windows can be replaced at a fraction of the cost it would cost a professional.

First, if you're working on a large window, make sure it is securely fastened to the frame. This is relatively easy and fast using the proper tools and techniques.

When you are ready to begin, remove the old window pane. Remove the metal glazing points that are attached to it. These are tiny metal triangles which act as "nails", holding the window in place. They are placed beneath a layer of glazing putty, which hardens into a solid, moulded wedge that holds the window firmly in place and hides the points.

After you have removed the old pane taken away, clean up the surrounding frame and wood. Scrape off any old paint and sand down the rabbet grooves where the glazing points were placed. Sand them down to bare wooden surfaces so you can paint the frames the same shade. After sanding the wood, apply a layer of flax oil. This will help extend its life.

Next, measure the dimensions of the window opening. It is necessary to measure the vertical and horizontal 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 allow for seasonal changes in the glass. You can take 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 replacement 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.