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How to Replace Window Panes

A damaged or cracked window is an inconvenience. It can also be a chance to upgrade your glass replacement on windows to energy efficient or insulated windows to reap benefits like more comfort, higher potential for resales, and less costs.

It's a task you can tackle yourself at a fraction of the cost of hiring an expert. You'll need only the proper tools and a few minutes of your time.

Glass

If your single pane windows are old, deteriorating or broken replacing them with modern glass that is tempered or insulated will improve energy efficiency and reduce noise while maintaining the historic integrity of older homes. The process of replacing a window pane is relatively easy and can be accomplished by most homeowners who possess basic hand tools. You will also need a replacement glass In Windows window pane, glazier's tips, pliers, and latex glazing putty. If needed, you can use a heatgun to warm the old putty. Before beginning, wear gloves and safety goggles as working with broken glass can cause injuries.

Remove any broken glass pieces remaining. This is best accomplished with a pair of pliers, however, a flathead screwdriver can also be effective in the pinch. Then, use a wood chisel or putty knife remove the remaining old putty from around the frame and sash. Work slowly and carefully making sure not to break the current window sash. It is a good idea to do this on a sturdy ladder rather than on the ground and have someone standing below the sash to help hold it in place.

Once 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 for the sash by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Take these measurements to an hardware store or home center and find a piece glass cut to size. You can cut the glass yourself if you possess the right tools.

After putting the new pane in place, run a small bead of caulking around the edge to make it weatherproof. Then install a glazier's point on the frame's opposite side to secure the pane into the right place. The points should not be so tight that they create friction between the frame and sash however they shouldn't be too loose.

Before putting the putty on, make sure to knead it until it is soft and free of lumps. Then you can roll it into pencil-sized strips. Apply the first strip to the corner of the frame. Work from corner to corner, making sure it is even and smooth.

Glazier's Points

The glazier's points are small triangular pieces of metal which help to secure the glass to the frame without damaging the delicate surface. It's easy to learn how to use this nefarious tool and you can save money on the expense of an expert installation.

After taking off the old putty, glazier points and any residue, clean the frame thoroughly using an utility knife. If necessary you can lightly sand the wood along rabbet grooves to smooth out rough spots. If you do sand the wood, be sure to protect it with painter's tack to avoid accidental damage.

Note down the exact dimensions of the frame. These measurements can be brought to a home center or hardware store and the new pane will be cut to a smaller size. This will ensure a tight fit and leave room for expansion and contraction.

Insert the new pane into the frame and press it down using your hands. Utilize the chisel's point or the back of the putty blade to tap in the glazier's points, as shown in Figure 11. After you're done, the points should be in line with the top edge of the pane and the shoulders of the points should be below the rabbet's lip. groove.

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

Once the glazing compound has dried, you're ready to 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 or cracking due to the moisture it absorbs. Apply this coat using a brush or the edge of your putty knife, and then employ the chisel or back end of the knife to gently hammer in the new sash and glazier's points into the rabbet grooves. Repeat this process at intervals of 10 inches around the frame.

Putty

A baseball thrown or a rock thrown by error or a branch falling can cause a broken or cracked window. Most windows can be repaired easily by installing a new piece. The glass is held in place by tiny metal clips known as a glazier's point, and putty, also called glazing compound. Remove the old pane and clean the area with the rag, a scraper that is a pull type or a wood chisel. Wear gloves and safety glasses while doing this work. If the window is secured to the frame, you'll need use a heat gun to soften the adhesive before prying it free.

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 for new caulk. Once the sash is re-installed then, apply a new silicone caulk to the glass to ensure it won't leak or discolor in time.

Take the glazing points out of the rabbets and the grooves in the sash, where the glass sits. If they're hard to cut, place the hand tool, like a heat gun over them to allow them to soften before. If you're using a heat gun, be cautious not to damage the railings or sash by placing the tool too close.

Prepare the bed for your new pane by removing the old glaze points and putty. Roll a rope of glazing compound between your hands, forming it into a 1/2-inch thick. Then, you can press it into the rabbets in which the glass will be. It's important that the glass sits on the putty on each side So if you have to tap it, gently press the glass into the rabbet with your thumb.

If the new pane is cracked you can fill it with a solvent-based glass glue or silicone caulk before pressing it into the sash. In other cases, you'll need to putty over the crack to form a tight seal and keep water out. Once the putty is dry clean the oily film from the glass and let it dry completely before you paint. Paint before the putty is completely dry. It will not form a good seal and could leak or discolor with time.

Paint

If you've had a broken replacement window seals pane, then you may be concerned about the expense of a new one. The truth is, replacing a single pane glass doesn't have to be expensive if you do it on your own. Even a double-paned window could be replaced for a fraction of the price it would cost a professional.

If you are working with large replacement glass for window near me windows first, ensure that it is securely fixed to the frame. This can be made relatively simple and quick with the right tools and techniques.

When you're ready to start with the removal of the old window pane by prying out the glazing points made of metal that are connected to it. They are basically tiny metal triangles that function as "nails" which hold the window in place in the wood frame. They are placed under a bead or glazing putty which hardens into an unbreakable wedge which holds the wood frame firmly in position and conceals the edges.

Once you have the old pane removed clean the surrounding frame and wood. Scrape off any paint that has been used and sand 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 the sanding process, apply a coat of flax oil on the bare wood to help extend its lifespan.

The next step is to determine the size of the window opening. It is necessary to take vertical and horizontal 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 during seasons of changes. You can bring these measurements to a hardware or home improvement shop and get 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 replacement sash windows 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.