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How to Replace Window Panes

A damaged window pane can be an inconvenience. It can also be a chance to upgrade your glass to energy efficient or insulated windows and enjoy benefits such as greater comfort, a higher resale value and reduced utility costs.

It's a project you can do yourself for less than the cost of hiring a professional. You only need the appropriate tools and a few minutes of your time.

Glass

If your single pane windows are old damaged, cracked or deteriorating replacing them with more modern insulated or tempered glass can increase energy efficiency and reduce noise while preserving the original character of older homes. The majority of homeowners with basic hand tools can replace window Pane windows with ease. In addition to a new pane, the following components are needed: latex glazing putty; glazier's points; pliers; and an electric heater to warm the old putty if required. Wear safety goggles and gloves prior to beginning. Working with broken glass could result in serious injuries.

Begin by removing any broken pieces of glass. It is recommended to use pliers for this, but a flathead can work equally. Make use of a wood chisel or putty knives, to take away any remaining old putty around the frame and the window sash. Be careful to not scratch the window sash. Be careful and slow. This is best done on a ladder, not the ground. Also, ensure that someone on the ground to keep it in place.

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

After putting in the new pane, run a small bead of caulking along the edge to ensure it is weatherproof. Then, you can install a glazier's pointing on each side of the frame to secure the pane in the right place. The points shouldn't be too tight that they create friction between the sash and frame but they shouldn't be too loose.

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

Glazier's Points

The glazier's points are the small triangular pieces which help to secure glass into the frame of a window without scratching or damaging the fragile surface. It's simple to learn how to use this secret tool and you can save money on the expense of a professional installation.

Once the old putty and glazier's points are removed Clean the frame thoroughly with a knife to get rid of any remaining residue. Lightly sand the frame in the rabbet grooves if needed to smooth rough areas. If you do sand the wood, make sure to protect it by using painter's tape to prevent accidental damage.

Write down the exact dimensions of the frame. Take these dimensions to an hardware store or home center and request that the new pane cut slightly smaller than the frame's opening. This will ensure that the pane fits perfectly and allows for expansion and contraction.

Place the new window in the frame and push it into the frame with your hand. Then, use the tip of your chisel, or the back of the putty knife to pierce the glazier's 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 thin layer glazing compound to the rabbet grooves and the 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, you need to coat the wood with an even layer of linseed. This will keep the new putty from taking up the moisture and drying out and cracking over time. Use a brush to apply this coat, or even the tip of the putty blade. Then use the chisel on the back of the putty tool or the back of the handle to gently hammer the new sash or glazier's point into the grooves of the rabbet. Repeat this process in intervals of 10 inches around the frame.

Putty

A baseball thrown, a rock thrown in error, or a fallen tree can result in a cracked or cracked window pane. Luckily, most windows can be replaced by simply putting a new piece in the proper place. The glass is held in the position with a tiny metal clip, referred to as a glazier’s point and putty. This compound is also known as glazing compound. Before installing a replacement window handle pane, first get rid of the old one and clean up the area with the help of a rag, a pull-type paint scraper or the wood chisel. Wear safety glasses and gloves while working. You'll need a heating gun in the event that the window is glued to the frame.

If you're planning to install the original sash in the future, take care to remove any molding pieces that secure the old pane. Then sand the sash to make sure it's flat and ready to be re-caulked. After the sash has been put back in place then, you can apply a silicone caulk to the glass. This will ensure that it doesn't be leaking or fade over time.

Remove the glazing points in the rabbets. These are the grooves in the sash, where the glass is. If they're difficult to cut, place a hand tool such as a heating gun over them for a few minutes to soften them. If you're using a heated gun, be careful not to scratch the sash or its railings by using the tool too close.

After the old glaze points and putty are removed, make a bed for the new pane. Roll a rope of glazing compound between your fingers, and make it around 1/2 inch thick. Place it into the rabbets, where the glass will be put. It is essential that the glass is positioned against the putty on both sides, so if you need to do so, gently tap the glass into the rabbet with your thumb.

If the new pane has a crack you can fill it with a solvent-based glass glue or silicone caulk before pressing it into the replacement sash windows. If the crack isn't sealed, you'll need to use putty to keep the water out. After the putty is dry then clean the oily film off the glass using a rag and allow it to completely dry before painting. If you paint before the putty is completely dry, it won't create an effective seal and could discolor or leak over time.

Paint

If you've experienced a broken window pane, then 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-paned window can be replaced for a fraction of the price it will cost a professional.

If you're working with a large glass window first ensure it is securely fixed to the frame. With the right tools and techniques to accomplish this task fairly easily and fast.

Once you're ready to begin with the removal of the old window pane by removing the metal glazing points that are attached to it. These are tiny triangles of metal which act as "nails", holding the window in place. They are placed beneath a layer of glazing putty that hardens into a solid, molded wedge which holds the window in place and conceals the points.

After you have removed the old pane removed clean the surrounding frame and wood. Scrape off any old paint, replace Window pane and sand the rabbet grooves that the glazing points were. These should be sanded 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 wood's surface to prolong its life.

The next step is to measure the dimensions of the window opening. You'll need to determine the vertical and horizontal dimensions of the entire opening, as well as the thickness. Subtract 1/8 inch from each measurement to ensure that you get a precise size for the new pane. This will also allow for expansion and contraction of the glass in times of seasonal change. Take these dimensions to the hardware or home improvement store, and they will have cut the glass 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.