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How to Replace Window pane Window Panes

A cracked window pane is a nuisance. This could be an opportunity to upgrade to energy-efficient windows or insulated ones and enjoy advantages like improved comfort, higher resale value and lower utility costs.

This is a project you could do yourself for only a fraction of the cost of hiring a professional. You'll only require the right tools and a few hours of your time.

Glass

Replace your single-paned windows using tempered or insulation glass to improve energy efficiency, reduce noise, and maintain the historical integrity of your old home. The procedure of replacing the window pane is easy and can be accomplished by anyone with basic hand tools. You will also require an additional window pane, glazier's tips, pliers, and latex glazing putty. If necessary you can use a heatgun to warm the old putty. Before starting, put on gloves and safety glasses as working with broken glass could cause injuries.

Take away any broken glass pieces remaining. It is recommended to use pliers for this however a flathead could be used equally. Make use of a wood chisel or putty knives, to take away any old putty remaining around the frame and the window sash. Be careful not to scratch the window sash. Work slowly and carefully. This can be done best on a ladder, not the ground. Also, you should have someone on the ground to keep it in place.

Make sure that the window frame is ready to accommodate the new pane when you have removed the old glue. To allow for seasonal expansion or contraction, subtract 1/8 inch each from the measurements of the width and height. These measurements can be sent to a hardware or home center store to get a piece cut of stock glass to the right size. Alternatively, you can cut the glass yourself, if you have the tools you need.

After putting in the new glass, apply caulking to the edge. This will make the glass weatherproof. Then install a glazier's point on the frame's opposite side to hold the pane in its place. The points should not be tight enough to cause friction between the frame and sash however they should not be loose.

Before applying the putty on the surface, gently 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 one corner to another, making sure it is even and smooth.

Glazier's Points

The glazier’s points are small triangular metal pieces that help secure the glass into the window frame without damaging the delicate surface. Learning how to use these hidden tiny pieces of help is simple and could save you money on professional installation or the cost of purchasing new glass.

Once the old putty and glazier's points are removed and the frame is thoroughly cleaned with a utility knife to eliminate any remaining traces. Lightly sand replace window pane the frame in the rabbet grooves if needed to smooth rough areas. If you sand wood, protect it with painter's tape to avoid accidental damage.

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

Place the new window in the frame and press it in place using your hand. Use the point of the chisel or the edge of the putty blade to smudge the glaziers' points as illustrated in Figure 11. The glazier's points should be aligned with the top edge of your pane and the shoulders should be just beneath that lip.

Apply a thin layer glazing compound on 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 thick coat of Linseed oil. This will prevent the new putty from drying out or cracking as it absorbs moisture. Apply this coat using a brush or the edge of your putty knife, and then employ the chisel or back end of the putty knife to gently hammer in the new sash and glazier's tips into the grooves of the rabbet. Repeat this procedure every 10 inches around the perimeter of the frame.

Putty

A baseball hit or a rock thrown in error, or a tree falling could result in a broken or cracked window pane. The majority of windows can be replaced by putting in a new piece. The glass is held into position by a small metal clip, called a glazier’s point and putty. This compound is also known as glazing compound. Remove the old pane and clean the area using a rag, a scraper that is a pull type or a wood chisel. Wear gloves and safety glasses when you work. If the window is attached to the frame, you'll need employ a heat gun in order to soften the adhesive before taking it off.

If you are planning to replace the original sash, gently remove any pieces of molding that secure the old pane. Sand the sash until it's flat and ready to receive new caulk. Once the sash is reinstalled it is possible to apply a silicone caulk on the glass. This will ensure that it won't be leaking or fade over time.

Take the glazing points out of the rabbets, or the grooves in the sash, where the glass is. If they're difficult to cut out, you can try holding the hand tool, such as a heat gun to soften them before you do. When using a heating tool, be sure to not damage the sash or its railings.

After the old points of glazing and putty are removed, make a bed for the new pane. Roll a rope with glazing compound between your fingers and make it about 1/2 inch thick. Place it into the rabbets, where the glass will be put. The glass should rest against the putty on both sides. If you need to you want to tap your glass lightly into the rabbet with your thumb.

If the new pane has damaged, you can use a silicone caulk or glass glue that is based on solvents to fill in the crack before pressing it into the sash. If the crack is not sealed, you will require putty to keep water from getting in. Once the putty is dry clean the oily film off the glass and let it dry completely before you paint. Paint before the putty has dried completely. It won't make a strong seal and may discolor or leak over time.

Paint

If you've suffered a break in a window pane, then you may be worried about the expense of replacing it. However, replacing a single glass pane doesn't have to break the bank when you do it yourself. In fact even windows with double glazing window replacement panes can be replaced at only a fraction of the cost of a professional.

First, if you are working on a large-sized window, make sure that it is securely attached to the frame. Using the proper tools and techniques to complete this task easily and fast.

If you're ready to begin with the removal of the old window pane by prying out the glazing points of metal that are attached to it. These are small metal triangles that act as "nails", holding the window in the frame. They are placed under a glaze putty or bead which hardens into a solid wedge which holds the wood frame in place and hides the points.

Once you have the old pane removed, clean up the surrounding frame and wood. Scrape off any old paint and sand down the rabbet grooves where the replacement double glazing windows points were placed. 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 layer of flax oil to the wood that is not sanded down to extend the life of the frame.

Next, measure the dimensions of the window's opening. You'll need to determine the horizontal and vertical 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 during seasonal changes. You can take these measurements to a hardware store or home improvement shop 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.