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How to replace Window pane Window Panes

A damaged or cracked window is 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 at only a fraction of the cost it would cost to employ an expert. It requires the right tools and only an hour or two of your time.

Glass

If your single pane windows are old, deteriorating or broken replacing them with modern glass that is tempered or insulated will increase energy efficiency and reduce noise while maintaining the historic integrity of older homes. The procedure of replacing windows is easy and can be completed by anyone with basic hand tools. In addition to a replacement pane, the following components are needed for the replacement process: latex glazing putty pliers, glazier's points and a heat gun for warming the old putty, if needed. Before beginning, wear gloves and safety goggles as working with broken glass could cause injuries.

Begin by removing any broken pieces of glass. It is recommended to use pliers however, a flathead may be useful equally. Use a wood chisel, or putty knives, to take away any old putty remaining around the frame and the window sash. Take your time and work slowly and be careful not to damage the old window sash. This is best done on a ladder, not on the ground. Also, have someone below the sash keep it in place.

After you have removed all the old putty, you can prepare the window frame to accommodate the new pane. Measure the width and height of the opening for the sash 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 glass stock to the proper size. You can also cut the glass yourself, if you have the tools you need.

After putting in the new glass, apply some caulking to the edge. This will make the glass weatherproof. Then install a glazier's point on each side of the frame to secure the pane in the right place. The points shouldn't be too tight as to cause friction between the frame and sash but they should not be too loose.

Before applying the putty, make sure to knead it until it is soft and free of lumps. Then make it into pencil-sized strips. Apply the first strip in the corner of the frame, moving from one corner to the next so that it is smooth and even.

Glazier's Points

The glazier's points are the tiny triangular pieces of steel that help secure glass into the frame of a window without damaging or scratching the delicate surface. Understanding how to use these hidden tiny pieces of help is simple and can save you money on a professional installation or the cost of purchasing new glass.

After removing the old putty, glazier points and any leftovers, clean the frame thoroughly using a utility knife. If necessary you can lightly sand the wood in the grooves of the rabbets to smooth rough areas. If you decide to sand the wood, make sure to protect it by using painter's tape to prevent accidental damage.

Take measurements of the empty frame and record precise 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 a snug fit and leave room for expansion and Replace window pane contraction.

Insert the new pane into the frame and push it in using your hands. Then, use the tip of your chisel or 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 level with the top edge of the pane. the shoulders that are raised of the points should be just below the rabbet's rim groove.

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

Once the glazing compound has dried it's time to put in the new window sash. First, coat the wood with an even layer of linseed. This will stop the new putty from taking in the moisture and drying out and cracking over time. Use a brush to apply this coat, or even the tip of the blade. Then, use the chisel on the back of the putty tool or the back of the handle to gently hit the new sash, or glazier's point into grooves of the rabbet. Repeat this process at intervals of 10 inches around the frame.

Putty

A baseball hit or a rock thrown in error, or a fallen tree could result in a broken or cracked window pane. Fortunately, the majority of windows can be repaired by simply placing a new piece in place. The glass is held in place using small clips made of metal called a glazier's point, and putty, often called glazing compound. Before installing a replacement pane, first remove the old one and clean up the area with the help of a rag, an abrasive scraper that is a pull type or a wood chisel. Wear protective glasses and gloves while doing this work. If the window is glued to the frame, you'll need to make use of a heat gun to soften the adhesive prior to taking it off.

If you're planning to install the original sash, gently remove the molding pieces that are used to secure the old pane. Sand the sash until it's flat and ready to receive new caulk. After the sash has been reinstalled, you can apply a silicone caulk on the glass. This will ensure that it won't leak over time or discolor.

Take the glazing points out of the rabbets, the grooves in the sash where the glass sits. If they're difficult to work out, try placing the hand tool, such as a heat gun to soften them up first. If you're using a heated gun, make sure not to cause damage to the sash or its railings by holding the tool too close.

Once the old glaze points and putty have been 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. Then, press it into the rabbets in which the glass will sit. It is crucial that the glass sits on the putty in all places on each side, so if you need to, lightly tap the glass into the rabbet using your thumb.

If the new pane is cracked then you can seal it with a solvent-based glue or silicone caulk before pressing it into the sash. If the crack is not sealed, you'll need to apply putty to keep the water out. After the putty has dried clean the oily film off of the glass and let it dry completely before painting. Paint after the putty has dried completely. It will not form a good seal and may leak or discolor with time.

Paint

If you've had a broken window pane, you might be concerned about the expense of replacing it. However, replacing a single glass pane doesn't have to break the bank if you do it yourself. In fact even windows with double panes can be replaced at a fraction of the cost of a professional.

If you're working with a large glass window first, ensure that it is securely attached to the frame. This task is relatively easy and fast with the right tools and techniques.

If you're ready to begin taking off the old window by removing the metal glazing points that are attached to it. These are small metal triangles that function as "nails" to hold the window in the frame. They are placed under a bead of glazing putty, which transforms into a solid moulded wedge that holds the window screen replacement firmly in place and hides the edges.

After you have the old pane taken away, clean up the surrounding frame and wood. Scrape off any paint and sand down the rabbet grooves where the glazing points were. These should be sanded to bare wood to allow you to paint them the same shade as the rest of the frame. After sanding the wood then apply a layer of flax oil. This will help prolong the life of the frame.

Next, measure the size of the window's opening. You will need to measure the horizontal and vertical dimensions of the entire opening as well as the thickness. To determine the exact dimensions of the new pane, subtract 1/8 inch from both measurements. This will also allow for expansion and contraction of the glass in times of seasonal change. You can take these measurements to a hardware or home improvement store and have the glass cut for you.

Now, Replace Window Pane 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.