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How to Replace window Pane Window Panes

A damaged window pane can be an issue. It could also be an opportunity to upgrade your glass to energy-efficient or insulated windows and enjoy benefits such as more comfort, higher the value of resales and lower utility bills.

It's a project you can do yourself for a fraction of the cost of hiring a professional. It requires the right tools and an hour or two of your time.

Glass

If your single pane windows are old broken, deteriorating or damaged replacing them with modern insulated or tempered glass can increase energy efficiency and decrease noise while preserving the historical integrity of older homes. The replacement of a window pane is relatively easy and can be completed by most homeowners who possess basic hand tools. In addition to a replacement double glazed windows pane, the following tools are required: latex glazing putty; glazier's points; pliers; and an electric heater to warm the old putty if required. Before starting, wear gloves and safety goggles as working with broken glass can cause injuries.

Begin by removing any remaining broken pieces of glass. This is best accomplished with pliers, however, flathead screwdrivers can work in the pinch. After that, use a wood chisel or putty knife remove the remaining old putty around the frame and sash. Be careful and slow making sure not to break the existing window sash. It is best to work on a sturdy ladder rather than the ground and to have someone standing below the sash to help hold it in place.

Make sure that the window frame is ready to accept the new pane once you have removed the old glue. Measure the width and height of the opening for the sash, subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be taken to a home center or hardware store to have a piece cut of stock glass to the right size. You can also cut the glass yourself, if you have the appropriate tools.

After installing the glass, apply a small amount of caulking around 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 place. The points shouldn't be tight enough to cause friction between the frame and sash, but they should also not be loose.

Before applying the putty to the surface, you must knead it thoroughly until it is smooth and free from lumps. Make it into pencil-sized strips. Place the first strip to the corner of the frame, working from one corner to another so that it is smooth and even.

Glazier's Points

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

Once the old putty and the glazier's points have been removed, thoroughly clean the frame with a utility knife to remove any remaining residue. If needed it is necessary to lightly sand the wood in the grooves of the rabbets to smooth out rough spots. If you do sand your wood, be sure to protect it with painter's tape to avoid accidental damage.

Take the dimensions of the frame and write down accurate measurements. These dimensions can be taken to an hardware or home centers store, and replace window pane the new frame will be cut slightly smaller. This will ensure a tight fit, and allow for expansion and contraction.

Insert the new pane into the frame and push it in using your hands. Make use of the chisel's point or the back of the putty knife to smudge the glaziers' points as illustrated in Figure 11. When you're done taping, they should be level with the top edge of the pane. the shoulders of the points should be below the lip of the rabbet groove.

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

Install the new window sash once the glazing compound has dried. The first step is to coat the wood with an even layer of linseed. This will stop the new putty from sucking up the moisture and drying out and cracking over time. Apply the coating using a brush this coat, or even the tip of the putty blade. Then, use the chisel that is on the back of the tool or the back of the handle to gently hit the new sash, or glazier's point into grooves of the rabbet. Repeat this procedure every 10 inches around the perimeter of the frame.

Putty

A baseball thrown, a rock thrown in error or a branch falling can result in a cracked or cracked window pane. The majority of windows can be repaired easily by putting in a new piece. The glass is held in place by a small metal clip, referred to as a glazier's point and putty. This compound is also referred to as glazing compound. Remove the old pane and clean the area using an abrasive, pull-type scraper or wood chisel. Wear protective glasses and gloves while working. You'll need a heat gun when the window is fixed to the frame.

If you're planning to install the original sash, remove any pieces of molding that hold the old pane in place. Then you can sand the sash down to ensure it's smooth and ready for a new caulk. After the sash has been installed, you can apply a silicone caulk over the glass. This will ensure that it doesn't be leaking or fade over time.

Remove the glazing points from the rabbets. These are the grooves on the sash where the glass is located. If they're hard to chisel out, you can try holding an instrument like a heat gun over them to soften them before you do. If you're using a heating gun, make sure not to damage the sash or its railings by holding the tool too tightly.

After the old glazing points and putty have been removed make a bed for the new pane. Roll a piece of glazing compound between your hands, shaping it into a 1/2-inch thick. Then, press it into the rabbets, where the glass will sit. The glass must rest against the putty on both sides. If needed gently tap your glass into the rabbet using your thumb.

If the new pane is cracked, you can apply a silicone caulk or glass glue made from solvents to seal the crack prior to pressing it into the sash. If the crack is not sealed, you will need to use putty to keep the water out. After the putty is dry and the film is oily, wipe it off the glass using a rag and allow it to completely dry before painting. If you paint before the putty is completely dry, it won't create a strong seal and may discolor or leak in time.

Paint

You might be worried about replacing a damaged piece of glass. However, replacing one glass pane does not need to cost a fortune when you do it yourself. Even a double-paned window can be replaced for a fraction of what it costs a professional.

If you are working with a large glass window, first make sure it is securely attached to the frame. By using the correct tools and techniques you can make this task relatively easy and speedy.

When you are ready to begin, remove the old window pane. Remove the metal glazing points attached to it. They are basically tiny metal triangles that act as "nails" which hold the window in place within the frame of wood. They are placed under a bead or glazing glue that sets to form an unbreakable wedge that holds the frame in place and hides the sharp edges.

After taking off the old pane clean the frame and the wood. Scrape off any old paint and sand down the rabbet grooves that the glazing points were. Sand them to bare wooden surfaces so you can paint the frames the same shade. After sanding the wood then apply a layer of flax oil. This will help to extend its life.

The next step is to measure the dimensions of the window opening. You will need 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 also allow for expansion and contraction of the glass in times of seasonal changes. Bring these measurements to your local hardware or home improvement store and have a piece 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.