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How to replace Window pane Window Panes

A damaged or cracked window can cause a lot of trouble. It can also be an opportunity to upgrade your glass to energy efficient or insulated windows to benefit from improved comfort, increased resale value and reduced utility costs.

You can do it yourself for only a fraction of the cost it would cost to hire an expert. You'll need only the right tools and a few minutes of your time.

Glass

If your single pane windows are old broken, deteriorating or damaged, replacing them with newer insulated or tempered glass can increase energy efficiency and decrease noise while preserving the historic integrity of older homes. The procedure of replacing the window pane is easy and can be completed by most homeowners who possess basic hand tools. In addition to a replacement pane, the following items are required such as latex glazing putty; glazier's points; pliers; and a heat gun for warming the old putty, if necessary. Wear safety goggles and gloves before you begin. Working with broken glass could result in serious injuries.

Begin by removing any remaining broken pieces of glass. This is best accomplished with a pair of pliers, but a flathead screwdriver may work in a pinch. Use a wood chisel, or putty knife to get rid of any old putty that remains around the frame and window sash. Be careful not to scratch the window sash. Be careful and slow. This can be done best on an elevated ladder, not on the ground. Also, ensure that someone lower to keep it in place.

After you have removed all of the old putty, it is time to prepare the window handle replacement frame for the new pane. Find the width and the height of the opening for the sash and subtract 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Bring these measurements to the nearest hardware store or home center, and find a piece glass cut to size. You can also cut the glass by yourself if you have the right tools.

After installing the glass Apply caulking to the edge. This will make the glass weatherproof. Then, you can install a glazier's pointing on each side of the frame to hold the pane in place. The points should not be so tight that they create friction between the frame and the sash However, they should not be loose.

Before putting the putty on, work it in a gentle manner until it's soft and free of lumps. Then, roll it into pencil-size strips. The first strip should be glued to the corner of the frame. Work from one corner to the next, making sure it is even and smooth.

Glazier's Points

The glazier's points are small triangular pieces of metal that allow glass to be secured into the window frame without damaging the delicate surface. Understanding how to use these tiny helpers is simple and could save you money on a professional installation or the cost of buying new glass.

After the old putty as well as the glazier's point are gone Clean the frame thoroughly with a utility knife to eliminate any remaining traces. Lightly sand the frame in the rabbet grooves to smooth rough areas. If you sand wood, protect it with painter’s tape to prevent accidental damage.

Note down the exact dimensions of the frame. These measurements can be brought to a home center or hardware store, and the new frame will be cut slightly smaller. This will ensure that the pane fits perfectly and allows for expansion and contraction.

Place the new pane into the frame and push firmly with your hands. Use the chisel's point, or the edge of the putty blade to smudge the glazier's points, as illustrated in Figure 11. The glazier's points should be flush against the top edge of your pane and the raised shoulders should be just beneath that lip.

Apply a thin layer glazing compound on the rabbet grooves and the edges of the glass. This will seal and protect the edges. Let it dry and cure completely.

Install the new window sash once the glazing compound has dried. First, saturate the wood with a heavy coat of linseed oil. This will keep the new putty from soaking up moisture and deteriorating and cracking over time. Apply the coating using a brush this coat, or the tip of the putty blade. Then, use the chisel that is on the back of the putty tool or the back of the handle to gently smash the new sash or glazier's point into the rabbet grooves. Repeat this procedure every 10 inches along the frame's perimeter.

Putty

A baseball that is thrown, an errant rock or a fallen branch can cause a window pane to break or crack. Fortunately, windows can be easily replaced by simply putting a brand new piece in the proper place. The glass is held into position by a small metal clip, also known as a glazier’s point and putty. This compound is also called glazing compound. Remove the old pane and clean the area using the rag, a pull-type scraper, or a wood chisel. Wear gloves and safety glasses while working. You'll need a heating gun in the event that the window is glued to the frame.

If you're planning to replace window handle the original sash, take off the molding that holds the old pane. Then you can sand the sash down to make sure it's flat and ready for 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 in the rabbets. These are the grooves in the sash, which is where the glass is. If they're difficult to work out, you can try holding the hand tool, such as a heat gun to soften them up first. When using a heat tool, be sure to avoid damaging the sash and replace window pane its railings.

After the old glazing points and putty are removed, prepare a bed for the new pane. Roll a rope with glazing compound between your fingers, and make it about 1/2 inch thick. Then, push it into the rabbets where the glass will be. The glass must be positioned against the putty on both sides. If necessary, lightly tap your glass into the rabbet with your thumb.

If the new pane is cracked then you can seal it with a solvent-based glass glue or silicone caulk before pressing it into the sash. If not, you'll have to apply putty over the crack to create an airtight seal and keep water out. Once the putty is dry clean the oily film from the glass and let it dry completely before painting. If you paint before the putty has completely dry, it won't form a solid seal and could leak or discolor over time.

Paint

You might be worried about replacing a broken pane of glass. However, replacing a single glass pane doesn't require a huge amount of money If you can do it yourself. Even double-paned windows can be replaced for a fraction of the price it costs for a professional.

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

If you're ready to begin, begin by removing the old window pane by prying out the metal glazing points that are connected to it. These are small metal triangles that act as "nails" to hold the window within the frame. They are buried beneath a bead or glazing glue that hardens to an unbreakable wedge which holds the wood frame securely in place and conceals the edges.

Once you have the old pane removed clean the surrounding frame and wood. Scrape away any paint and sand down the rabbet grooves, where the glazing points used to be. Sand them down to bare wood surfaces, so that you can paint the frames with the same shade. After the sanding process, apply a coat of flax oil to the wood that is not sanded down to help extend its lifespan.

The next step is to determine the size of the window opening. You'll need to determine 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 also allow for expansion and contraction of the glass during seasons of changes. Take these dimensions to the hardware or home improvement store and ask them to cut you cut the glass 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.