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How to Replace Window Panes

A cracked window pane is an inconvenience. This could be an opportunity to upgrade your windows to energy efficient or insulated ones and enjoy benefits such as improved comfort, increased resale value and lower utility costs.

It's a task you can do yourself for less than the cost of hiring an expert. It requires the right tools and only an hour or two of your time.

Glass

Replace your single-paned windows with tempered or insulation glass to improve energy efficiency, cut down on noise, and protect the historic integrity of your old home. A majority of homeowners with hand tools can replace a window pane. You will also require an extra window pane, glazier's tips pliers, and latex glaze putty. If necessary you may use a heatgun to warm the old putty. Before beginning, wear gloves and safety glasses as working with broken glass can cause injuries.

Begin by removing any broken pieces of glass. This can be done with pliers, though using a flathead screwdriver may work in the pinch. Use a wood chisel, or putty knife to get rid of any old putty that remains around the frame and the window replacement panes sash. Be careful to not scratch the window sash. Take your time and work slowly. This is best done on a ladder, not on the ground. Also, you should have someone lower to hold it steady.

After you have removed all of the old putty, prepare the window frame for the new pane. Find the width and the height of the opening in the sash by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be sent to a home center or hardware store to get an item cut from glass that is in stock to the correct size. Alternately, you can cut the glass yourself if have the right tools.

After installing the new glass After installing the glass, apply caulking to the edge. This will make the glass weatherproof. Install a glazier's point on both sides of the frame. This will secure the pane. The points shouldn't be so tight that they create friction between the sash and the frame, but they also shouldn't be loose.

Before applying the putty make sure to knead it until it's soft and free of lumps. Cut it into pencil-sized pieces. The first strip should be glued to the frame's corner. Work from corner to corner to ensure it's even and smooth.

Glazier's Points

The glazier's points are tiny triangular pieces of steel which help to secure glass into a window frame without scratching or damaging the fragile surface. It's easy to understand how to use this hidden tool, and you'll be able to save money on the expense of an installation by a professional.

After getting rid of the old putty glazier points and any residue clean the frame thoroughly with an utility knife. If needed, Replace Window pane lightly sand the wood along grooves of the rabbet to smooth rough spots. If you do sand the wood, make sure to protect it with painter's tape to avoid accidental damage.

Write down the exact dimensions of the frame. Bring these measurements to a hardware store or home center, and have the new pane cut smaller than the frame's opening. This will ensure a snug fit and leave room for expansion and contraction.

Place the new pane into the frame and push it in using your hands. Make use of the chisel's point or the back of the putty knife to smudge the glazier's points, as shown in Figure 11. When you're done, they should be flush with the top edge of the pane and the shoulders that are raised of the points should be just below the rabbet's lip. groove.

Apply a thin layer glazing compound to the rabbet grooves as well as the edges of new glass. This will seal and protect the edges. Allow this to dry and cure fully.

When the glazing compound is dry and the glazing compound is dry, replace window Pane you can install the new window sash. First, saturate the wood with a heavy coat of linseed oil. This will stop the new putty from drying out and cracking when it absorbs moisture. Apply the coat using a brush or the tip of your knife, and then use the chisel or the back end of the knife to gently hammer in the new sash and glazier's points into the rabbet grooves. Repeat this process in intervals of 10 inches around the frame.

Putty

A baseball hit, a rock thrown in error, or a tree falling could result in a broken or cracked window pane. Fortunately, the majority of windows can be repaired by simply putting a brand new piece of glass in its the proper place. The glass is held in place by small clips made of metal called a glazier's point and putty, often called glazing compound. Before installing a new pane, first remove the old one and clean up the area using a rag and an abrasive scraper that is a pull type or a wood chisel. Wear gloves and safety glasses when working. If the window is glued to the frame, you'll need to employ a heat gun in order to soften the adhesive before prying it free.

If you are planning to Replace Window Pane your original sash, you must remove the molding that supports the old pane. Then you can sand the sash down to make sure it's flat and ready to be re-caulked. After the sash has been reinstalled it is possible to apply a silicone caulk on the glass. This will ensure that it doesn't leak over time or discolor.

Remove the glazing points in the rabbets. These are the grooves on the sash, which is where the glass is located. If they are hard to chisel, use a hand tool such as a heating gun over them to allow them to soften before. When using a heat tool, be sure to avoid damaging the sash or its railings.

Once the old points of glazing and putty have been removed, make a bed for the new pane. Roll a rope of glazing compound between your hands, forming it to be about 1/2-inch thick. Then, press it into the rabbets where the glass will sit. It is crucial that the glass is positioned against the putty on each side If you have to, lightly tap the 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 cover the crack prior to pressing it into the sash. If the crack isn't sealed, you will require putty to keep water out. Once the putty is dry clean the oily film off the glass and let it dry completely before painting. Paint before the putty has dried completely. It will not create a solid seal and may discolor or leak over time.

Paint

You may be concerned about replacing a damaged piece of glass. But the truth is that replacing one glass pane does not 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 would cost for a professional.

If you are working with a large glass window, first make sure it is securely attached to the frame. With the right tools and techniques to complete this task easily and quick.

If you're ready to begin, begin by removing the old window pane by prying out the metal glazing points that are connected to it. These are basically small metal triangles that function as "nails" that keep the window in place in the wood frame. They are submerged beneath a layer of glazing putty, which transforms into a solid moulded wedge which holds the window in place and hides the window's points.

After removing the old pane, clean the frame and the wood. Scrape away any paint and sand down the rabbet grooves where the glazing points were. These should be sanded down to bare wood, to allow you to paint them the same color as the rest the frame. After sanding the wood then apply a layer of flax oil. This will help to extend its life.

The next step is to measure the dimensions of the window's opening. You will need to take vertical and horizontal measurements of the entire opening and also the thickness of the old pane. 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 seasonal changes. You can take these measurements to a hardware store 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.