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How to Replace Window Panes

A cracked window pane can be a source of frustration. It could also be a chance to upgrade your glass to energy-efficient or insulated windows glasses replacement glass for windows (Olderworkers explains) and reap benefits like improved comfort, increased potential for resales, and less bills.

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

Glass

Replace your old single-paned windows using tempered or insulated glass to increase the efficiency of your energy, reduce noise, and protect the historic integrity of your old home. The procedure of replacing the window pane is easy and can be accomplished by most homeowners who possess basic hand tools. Alongside a replacement pane, the following tools are needed for the replacement process: latex glazing putty Glazier's points; pliers and the use of a heat gun to warm the old putty, if necessary. Wear safety goggles and gloves before you begin. Working with broken glass can cause serious injuries.

Take away any broken glass pieces that remain. This is best done using pliers, though using flathead screwdrivers can work in the pinch. Then, use a wood chisel, or putty knife, to remove the remaining old putty from the frame and the sash. Be careful to not damage the window sash. Take your time and work slowly. It is best to do this using a sturdy ladder rather than the ground and to have someone stand below the sash to help keep it in place.

Once you have removed all of the old putty, it is time to prepare the window frame to fit the new pane. Measure the width and height of the sash opening by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Bring these measurements to a hardware store or home center and get a piece of stock glass cut to size. Alternately, you can cut the glass yourself if you have the tools you need.

After putting in the new glass After installing the glass, apply some caulking to the edge. This will make the glass weatherproof. Then, place a glazier's tip on each side of the frame to secure the pane into its place. The points shouldn't be tight enough to cause friction between the frame and sash, but they should also not be loose.

Before applying the putty, knead it thoroughly until it's soft and free of lumps. Then make it into pencil-sized strips. Place the first strip in the corner of the frame, working from one corner to the other so that it is even and smooth.

Glazier's Points

The glazier's points are tiny triangular pieces of steel that allow glass to be secured into a window frame without scratching or damaging the fragile surface. It's simple to learn how to use this hidden tool, and you'll save money on the cost of an expert installation.

Once the old putty and the glazier's point are gone, thoroughly clean the frame with a knife to eliminate any remaining residue. If necessary it is necessary to lightly sand the wood in the rabbet grooves to smooth out rough areas. If you decide to sand the wood, be sure to protect it by using painter's tape to prevent accidental damage.

Write down the exact dimensions of the frame. Take these measurements to an hardware store or home center and have the new pane cut smaller than the frame's opening. 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 with your hands. Use the chisel's point or the edge of the putty blade to smudge the glaziers' points as shown in Figure 11. The glazier's points should be in line with the top edge of the pane and the shoulders raised should be just beneath that lip.

Apply a small amount of glazing compound over the edges of the new glass and in the rabbet grooves, to seal and protect them. Allow it to dry and cure completely.

Install the new window sash when the glazing compound has dried. The first step is to coat the wood with a heavy coat of Linseed oil. This will prevent the newly-created putty from drying out and cracking as it absorbs moisture. Apply the coating using a brush 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 smash the new sash or glazier's point into the rabbet grooves. Repeat this procedure every 10 inches around the perimeter of the frame.

Putty

A baseball hit, a rock thrown in error, or a fallen tree can cause a broken or cracked window pane. Fortunately, the majority of windows can be easily replaced by simply placing a new piece in the proper place. The glass is held in place using small clips made of metal called the glazier's pointed and putty, which is often called glazing compound. Remove the old pane and clean the area with an abrasive, pull-type scraper, or a wood chisel. Wear safety glasses and gloves while you do this work. If the window double glazing replacement is glued to the frame, you'll need employ a heat gun in order to soften the adhesive prior to prying it free.

If you are planning to reinstall your original sash, remove the molding that supports the old pane. Sand the sash until it's flat and ready to receive new caulk. After the sash has been re-installed, apply a new silicone caulk around the glass to ensure it doesn't swell or fade as time passes.

Remove the glazing points from the rabbets. These are the grooves on the sash, which is where the glass is located. If they're difficult to cut out, try placing the hand tool, such as a heat gun to soften them up first. If you're using a heating gun, be cautious not to damage the railings or sash by using the tool too tightly.

Once the old points of glazing and putty have been removed make a bed for the new pane. Roll a rope with glazing compound between your fingers, and make it around 1/2 inch thick. Then, push it into the rabbets in which the glass will sit. The glass should rest against the putty on both sides. If needed gently tap your glass into the rabbet with your thumb.

If the new pane has damaged, you can use the silicone caulk or glass glue made from solvents to seal the crack prior to pressing it in the sash. If the crack isn't sealed, you will require putty to keep water out. Once the putty is dry, wipe the oily film from the glass and let it dry completely before painting. Paint before the putty has dried completely. It won't make a strong seal and may discolor or leak over time.

Paint

If you've suffered a break in a window pane, you may be worried about the expense of a new one. But the truth is that replacing one glass pane does not have to break the bank if you do it yourself. Even a double glazed windows replacement-paned window could be replaced for a fraction of what it will cost for a professional.

If you are working with large glass windows, first make sure it is securely attached to the frame. This task can be made relatively simple and fast using the appropriate tools and techniques.

When you are ready to begin taking down the old window pane. Pry out the metal glazing points that are attached to it. These are small metal triangles that function as "nails", holding the window within the frame. They are buried beneath a bead or glazing glue that hardens to solid wedge that holds the wood frame firmly in position and hides the points.

After removal of the old pane clean the frame and wood. Scrape off any old paint and sand down the rabbet grooves in which the glazing points were placed. Sand them down to clean wooden surfaces, allowing you to paint the frames the same color. After sanding, apply a coat of flax oil on the wood's surface to prolong its life.

The next step is to determine the width of the window's opening. You will need to take horizontal and vertical measurements of the entire opening, as well as the thickness of the old pane. Subtract 1/8 inch from each measurement to ensure you have the exact size for the new pane. This will also allow for expansion and contraction of the glass during seasonal change. Take these measurements to your local hardware or home improvement store and 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.