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How to Replace Window Panes

A cracked window pane can cause a lot of trouble. It could be a chance to upgrade to energy-efficient windows or insulated ones to enjoy benefits like increased comfort, increased resale value and lower utility costs.

You can do it yourself at a fraction of what it would cost to employ an expert. You'll need only the right tools and a few hours of your time.

Glass

Replace your old single-paned windows with tempered or insulated glass to increase energy efficiency, cut down on noise, and maintain the original character of your older home. The process of replacing a window pane is relatively easy and can be accomplished by homeowners with basic hand tools. In addition to a new pane, the following components are needed: latex glazing putty; Glazier's points; pliers and a heat gun for warming the old putty if required. Wear safety glasses and gloves before you begin. Working with broken glass could result in serious injuries.

Take away any broken glass pieces remaining. This is best done using pliers, however, a flathead screwdriver may be effective in a pinch. After that, use a wood chisel or putty knife take the remainder of the old putty from the frame and the sash. Be careful to not damage the window sash. Take your time and work slowly. This should be done on a ladder, not the ground. Also, you should have someone below the sash keep it in place.

Once you have removed all the old putty, it is time to prepare the window frame for 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). These measurements can be taken to a home center or hardware store to have an item cut from glass replacement windows stock to the proper size. You can also cut the glass yourself if have the right tools.

After installing the new glass, apply a small amount of caulking on the edges. This will make the glass weatherproof. Install a glazier’s point on both sides of the frame. This will ensure the pane. The points should not be too tight that they cause friction between the frame and sash, Windows Replacement Glass but they should also not be loose.

Before applying the putty knead it thoroughly until it is smooth and free of lumps. Then make it into pencil-sized strips. The first strip should be placed in the corner of the frame, moving from one corner to another so that it is smooth and even.

Glazier's Points

The glazier's points are the small triangular pieces of metal that allow glass to be secured into frames for windows without damaging or scratching the delicate surface. It's easy to learn how to use this nefarious tool and you can save money on the expense of an installation by a professional.

After getting rid of the old putty glazier points, and any other remnants, clean the frame thoroughly with an utility knife. Lightly sand the wood into the rabbet grooves to smooth out rough areas. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Take the dimensions of the frame and note down precise measurements. Bring these measurements to an hardware store or home center, and have the new pane made slightly smaller than the frame's opening. This will ensure a secure fit and will allow room for expansion and contraction.

Place the new pane into the frame and push firmly using your hands. Make use of the chisel's point or the edge of the putty blade to tap the glaziers' points as shown in Figure 11. The glazier's points should sit in line with the top edge of the pane and the raised shoulders should be just below the lip.

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

Install the new window handle replacement sash after the glazing compound has dried. First, coat the wood with a thick coat of linseed oil. This will stop the new putty from soaking in the moisture and deteriorating and cracking over time. Use a brush to apply this coat, or the point of the putty blade. Then use the chisel that is on the back of the tool or the back of the putty handle to gently hit the new sash, or glazier's point 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 result in a cracked or cracked window. The majority of windows can be replaced by installing a new piece. The glass is held in place by a small metal clip, called a glazier’s point and putty. This compound is also referred to as glazing compound. Before installing a new pane, first remove the old one and clean the area using the help of a rag, an abrasive scraper that is a pull type or an abrasive wood chisel. Wear safety glasses and gloves while working. You'll require a heat gun when the window is fixed into the frame.

If you're planning to install the original sash, take off the mold that holds the old pane. Sand the sash until it is flat and ready to receive new caulk. Once the sash is installed, apply a new silicone caulk to the glass to ensure that it doesn't swell or fade over time.

Remove the glazing points from the rabbets, or the grooves in the sash that the glass is. If they're difficult to cut out, try placing a hand tool like a heat gun over them to soften them first. If you're using a heat gun, be careful not to scratch the sash or its railings by using the tool too closely.

Create a bed for your new pane by removing the old putty and glazing points. Roll a rope of glazing compound between your hands, and form it into a 1/2-inch thick. Press it into the rabbets, where the glass will be placed. It is essential that the glass is positioned against the putty on each side, so if you need to do so, gently tap the glass into the rabbet using your thumb.

If the new pane is cracked, you can cover it with a solvent-based glue or silicone caulk prior pressing it into the sash. If the crack is not sealed, you'll need to use putty to keep water from getting in. After the putty has dried then clean the oily film off the glass with a rag and allow it to completely dry before painting. If you paint before the putty has completely dry, it will not form a strong seal and may leak or discolor over time.

Paint

You might be worried about replacing a damaged piece of replacement glass for a window. But the truth is that replacing a single glass pane doesn't require a huge amount of money when you do it yourself. In fact even windows with double panes can be replaced for only a fraction of the cost of an expert.

If you are working with a large glass window, first make sure it is securely fixed to the frame. By using the correct tools and techniques, you can accomplish this task fairly easily and fast.

When you're ready to start, begin by removing the old window pane by prying out the glazing points made of metal that are connected to it. These are basically small metal triangles that function as "nails" that hold the replacement window handle in within the frame of wood. They are submerged beneath a bead or glazing putty that sets to form an unbreakable wedge which holds the wood frame firmly in position and hides the sharp edges.

After removing the old pane, clean the frame and wood. Scrape off any paint and sand down the rabbet grooves, where the glazing points used to be. These should be sanded to the point of being bare, to allow you to paint them the same color as the rest the frame. After sanding, apply a coat of flax oil on the bare wood to prolong its life.

Then, you need to measure the size of the window opening. It is necessary to measure the horizontal and vertical dimensions of the entire opening as well as the thickness. To get the exact size 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 store or home improvement shop and get the glass cut for you.

Now, it's time to bed the new replacement window panes 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.