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How to Replace Window Panes

A cracked window pane can cause a lot of trouble. This could be an opportunity to upgrade to energy-efficient windows or insulated ones and enjoy benefits like increased comfort, higher resale value and reduced utility bills.

You can do it yourself at a fraction of what it would cost to hire an expert. It requires the right tools and an hour or two of your time.

Glass

Replace your old single-paned windows using tempered or insulate glass to improve the efficiency of your energy, reduce noise, and protect the historic integrity of your old home. A majority of homeowners with hand tools can repair a window pane. You'll also require a upvc replacement window handles window pane, glazier's suggestions, pliers, and latex glaze putty. If needed you can make use of a heat gun to warm the old putty. Before starting, wear gloves and safety goggles as working with broken glass can cause injuries.

Remove any broken glass pieces that remain. This can be done with a pair of pliers, though using a flathead screwdriver may be effective in the pinch. After that, use a wood chisel or putty knife remove the rest of the old putty around the frame and sash. Be careful not to break the window sash. Be careful and slow. This should be done on an elevated ladder, not on the ground. Also, have someone below the sash hold it steady.

Once you have removed all of the old putty, you can 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). Bring these measurements to an hardware store or home center and have a piece of stock glass cut to size. You can also cut the glass by yourself if you possess the right tools.

After installing the new pane after installing the new pane, put a tiny amount of caulking around the edges to ensure it is weatherproof. Then, place a glazier's tip on the frame's opposite side to hold the pane in place. The points should not be so tight that they create friction between the sash and frame however they should not be too loose.

Before applying the putty knead it thoroughly until it is soft and free of lumps. Make it into pencil-sized strips. Place the first strip to the corner of the frame, moving from one corner to the other to ensure it is even and smooth.

Glazier's Points

The glazier's points are small triangular pieces of metal that help secure glass into a window frame 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 an expert installation.

After the old putty and the glazier's points have been removed, thoroughly clean the frame with a knife to eliminate any remaining residue. If needed you can lightly sand the wood in the rabbet grooves to smooth rough areas. If you sand wood protect it with painter's tape to avoid accidental damage.

Take measurements of the empty frame and write down accurate measurements. These dimensions can be taken to the hardware or home center store, and the new pane will be cut slightly smaller. This will ensure that the pane fits snugly and allows for expansion and contraction.

Place the new pane into the frame and push firmly with your hands. Then, you can use the point of your chisel or the back end of the putty knife to pierce the glazier's facets, 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 that are raised of the points should be below the lip of the rabbet groove.

Apply a thin layer of glazing compound over the edges of the new glass and in the rabbet grooves, to seal and protect them. Let it dry and cure fully.

Once the glazing compound has dried it's time to put in the new window sash. First, you need to coat the wood with a thick layer of linseed. This will stop the new putty from soaking up the moisture and drying out and cracking over time. Apply this coat with a brush or the tip of your knife, then use the chisel, or the back end of the knife to gently hammer the new sash and glazier's points into the rabbet grooves. Repeat this process every 10 inches around the perimeter of the frame.

Putty

A baseball hit or a rock thrown by error or a branch falling could result in a broken or cracked window. The majority of windows can be repaired easily by installing a new piece. The glass is held in place by small clips made of metal called the glazier's pointed and putty, often called glazing compound. Before installing a replacement pane, Glazier first get rid of the old one and clean up the area using the help of a rag, an abrasive scraper that is a pull type or a wood chisel. Wear protective glasses and gloves while you do this work. You'll need a heating gun when the window is fixed to the frame.

If you're planning to install your original sash, remove the molding that supports the old pane. Then, sand the sash to make sure it's flat and ready to be re-caulked. Once the sash is reinstalled then, you can apply a silicone caulk on the glass. This will ensure that it won't leak over time or discolor.

Remove the glazing points in the rabbets. These are the grooves on the sash, where the glass is. If they're hard to chisel, hold an instrument such as a heating gun over them for a few minutes to soften them. If you're using a heating gun, be cautious not to cause damage to the sash or its railings by using the tool too closely.

Create the bed for your new pane by removing the old glaze and putty. Roll a rope of glazing compound between your fingers and make it around 1/2 inch thick. Then, push it into the rabbets in which the glass will rest. It is crucial that the glass is positioned against the putty on both sides 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 cover it with a solvent-based glue or silicone caulk prior to pressing it into the sash. Otherwise, you'll need to apply putty over the crack to form an airtight seal and keep water out. When the putty dries and the film is oily, wipe it off the glass using an abrasive and allow it to dry completely prior to painting. If you paint before the putty is 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 glass. But the truth is that replacing a single glass pane doesn't have to break the bank If you can do it yourself. In fact even windows with double panes can be replaced for only a fraction of the cost of a professional.

First, if you're working on a large-sized window, make sure it is securely fastened to the frame. This job can be done relatively easy and fast with the right tools and techniques.

When you are ready to start taking down the old window pane. Remove the metal glazing points that are attached to it. These are basically small metal triangles that act as "nails" that hold the window in place within the frame of wood. They are buried beneath a bead or glazing putty which hardens into a solid wedge that holds the frame securely in place and hides the points.

Once you have the old pane taken away clean the surrounding frame and wood. Scrape away any old paint and sand down the rabbet grooves where the glazing points were. Sand them down to clean wooden surfaces so you can paint the frames with the same shade. After sanding the wood, apply a layer of flax oil. This will help extend its life.

The next step is to measure the dimensions of the window's opening. It is necessary to take horizontal and vertical 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 allow for seasonal changes in the glass. You can bring these measurements to a hardware store or home improvement store 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.