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How to Replace Window Panes

A damaged or cracked replacement window can be a nuisance. It could also be a chance to upgrade your glass to energy efficient or insulated windows and benefit from greater comfort, a higher potential for resales, and less bills.

You can do it yourself for a only a fraction of the cost it would cost to employ an expert. It requires the right equipment and an hour or two of your time.

Glass

If your single pane windows are old broken, deteriorating or damaged, replacing them with newer glass that is tempered or insulated will increase energy efficiency and reduce noise while also preserving the historic integrity of older homes. Most homeowners with basic hand tools can repair windows with ease. You will also need an additional window pane, glazier's tips pliers, and latex glazing putty. If needed, you can make use of a heat gun to warm the old putty. Wear safety glasses and gloves prior to beginning. Working with broken glass could cause serious injuries.

Begin by removing any remaining broken pieces of glass. It is recommended to use pliers for this however, a flathead may be used equally. Make use of a wood chisel or putty knives, to take away any old putty remaining around the frame and window sash. Work slowly and carefully, taking care not to break the existing window sash. It is recommended to do this on a stable ladder rather than on the ground, and to place someone on the sash to help keep it in place.

Make sure the window frame is ready to accept the new pane after you have removed the old putty. Take measurements of the width and height of the opening in the sash by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Take these measurements to the nearest hardware store or home center, and get a piece of stock glass cut to size. You can cut the glass yourself if you have the appropriate tools.

After installing the new pane, run a small bead of caulking along the edge to make it weatherproof. Then, you can install a glazier's pointing on the frame's opposite side to secure the pane into the right place. The points shouldn't be so tight that they cause friction between the frame and the sash However, they should not be loose.

Before applying the putty, work it in a gentle manner until it is smooth and free of lumps. Roll it into pencil-sized strips. The first strip should be glued to the frame's corner. Work from one corner to the next to ensure it's even and smooth.

Glazier's Points

The glazier's facets are small triangular pieces of metal which help to secure glass replacement in windows into frames for windows without damaging or scratching the delicate surface. Knowing how to use these tiny helpers is simple and can save you money on professional installation or the cost of new glass.

After the old putty as well as the glazier's points have been removed and the frame is thoroughly cleaned using a utility knife to get rid of any remaining residue. Lightly sand the wood into the rabbet grooves if needed to smooth rough areas. If you decide to sand the wood, ensure you protect it with painter's tack to avoid accidental damage.

Take the dimensions of the frame and write down accurate measurements. 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 a secure fit and will allow room for expansion and contraction.

Place the new pane in the frame and press it down with your hands. Then, you can use the point of your chisel or the back of the putty knife to pierce 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 raised shoulders of the points should be below the rabbet's rim groove.

Apply a thin layer of glazing compound over the edges of the glass that has been made and into the rabbet grooves, to seal and protect them. Let it dry completely and cure.

When the glazing compound is dry and the glazing compound is dry, you can install the new window sash. First, coat the wood with a thick layer of linseed. This will prevent the newly-created putty from drying out or cracking due to the moisture it absorbs. Apply this coat with a brush or the edge of your putty knife, then use the chisel or the back end from the putty knife to gently hammer the new sash and glazier's points into the grooves of the rabbet. Repeat this process at intervals of 10 inches around the frame.

Putty

A hurled baseball, an errant rock or a falling branch can cause a window to break or crack. Fortunately, the majority of windows can be repaired by simply placing a new piece of glass in its the right place. The glass is held into the position with a tiny metal clip, referred to as a glazier’s point and putty. This compound is also known as glazing compound. Remove the old pane and clean the area with an abrasive, pull-type scraper or wood chisel. Wear safety glasses and gloves while you do this work. You'll need a heat gun in the event that the window is glued into the frame.

If you are planning to replace the original sash, gently remove any molding pieces that hold the old pane in place. Sand the sash until it is flat and ready for new caulk. Once the sash is installed and sanded, apply a fresh silicone caulk around the glass to ensure that it will not leak or change color in time.

Take the glazing points out of the rabbets and the grooves in the sash that the glass is. If they're difficult to cut, place the hand tool, such as a heating gun over them to allow them to soften before. When using a heat tool, make sure to not scratch the sash or its railings.

Once the old glaze points and putty have been removed, prepare a bed for the new pane. Roll a rope of glazing compound between your hands, forming it to be around 1/2-inch thick. Then, push it into the rabbets where the Replacement Glass For A Window will rest. The replacement glass for a window must rest against the putty on both sides. If you need to gently tap your glass into the rabbet using your thumb.

If the new pane has a crack you can fill it with a solvent-based glass glue or silicone caulk prior to pressing it into the sash. In other cases, you'll need to apply putty on the crack to create an impervious seal to keep water out. When the putty dries then clean the oily film off the glass using a rag and allow it to completely dry before painting. Paint after the putty has completely dried. It will not create a solid seal and could leak or discolor with time.

Paint

You might be worried about replacing a broken pane of glass. But the truth is that replacing one glass pane does not have to break the bank when you do it yourself. Even a double-paned window could be replaced for a fraction of the price it would cost a professional.

First, if you are working on a large-sized window, make sure that it is securely attached to the frame. This task is relatively easy and fast using the proper tools and techniques.

When you're ready to start with the removal of the old window pane by prying out the glazing points of metal that are connected to it. These are essentially small metal triangles which function as "nails" that keep the window cost replacement in place within the frame of wood. They are buried beneath a bead or glazing glue that sets to form an unbreakable wedge that holds the frame firmly in position and hides the points.

After removal of the old pane clean the frame and the wood. Scrape away any old paint and sand down the rabbet grooves, where the glazing points were. Sand them to bare wood surfaces, so that you can paint the frames the same shade. After sanding, apply a layer of flax oil on the wood that is not sanded down to prolong its life.

Then, take measurements of the dimensions of the window's 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 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.