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How to replace Window Pane Window Panes

A cracked window pane is a nuisance. It can also be a chance to upgrade your glass to energy-efficient or insulated windows, and benefit from more comfort, higher potential for resales, and less bills.

It's a task you can tackle yourself at only a fraction of the cost of hiring an expert. You'll need only the appropriate tools and a few minutes of your time.

Glass

If your single pane windows are old broken, deteriorating or damaged replacing them with more modern glass that is tempered or insulated can increase energy efficiency and decrease noise while maintaining the original character of older homes. Most homeowners with basic hand tools can repair windows with ease. In addition to a new pane, the following components are required: latex glazing putty; Glazier's points; pliers and an electric heater to warm the old putty if required. Before beginning, wear gloves and safety glasses as working with broken glass could cause injuries.

Begin by removing any remaining broken pieces of glass. It is best to use pliers for this however, a flathead may be useful equally. Utilize a wood chisel or putty knives, to take away any remaining old putty around the frame and the window replacement sash. Be careful and slow, taking care not to break the current window sash. It is a good idea to work using a sturdy ladder instead of the ground and have someone stand below the sash to help keep it steady.

Prepare the window frame to accept the new pane after you have removed the old glue. Find the width and the height of the opening for the sash by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be sent to a hardware or home center store to get cut a piece of stock glass to the right size. You can also cut the glass by yourself if you have the appropriate tools.

After installing the new pane After installing the new pane, apply a small amount of caulking along the edge to ensure it is weatherproof. Then, you can install a glazier's pointing on the frame's opposite side to secure the pane in place. The points shouldn't be so tight that they create friction between the frame and sash, but they should also not be loose.

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

Glazier's Points

The glazier's facets are small triangular pieces of metal that allow glass to be secured into the frame of a window without scratching or damaging the fragile surface. It's simple to learn how to use this hidden tool, and you'll save money on the cost of a professional installation.

After taking off the old putty, glazier points, and any other leftovers, clean the frame thoroughly with an utility knife. If needed it is necessary to lightly sand the wood along the rabbet grooves to smooth out rough areas. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Note down the dimensions of the frame. Take these measurements to a hardware store or a home center, and have the new pane made slightly smaller than the frame's opening. This will ensure a snug fit and will allow room for expansion and contraction.

Place the new pane in the frame and push firmly using your hands. Utilize the point of the chisel, or the back of the putty blade to smudge the glazier's points, as illustrated in Figure 11. When you're done, they should be level with the top edge of the pane and the shoulders of the points should be just below the rabbet's rim groove.

Apply a small amount of glazing compound over the edges of the new glass and in the rabbet grooves to seal and protect them. Allow it to dry and cure completely.

Install the new window sash when the glazing compound has dried. The first step is to coat the wood with a thick coat of linseed oil. This will prevent the newly-created putty from drying out or cracking as it absorbs moisture. Apply the coat using a brush or the tip of your putty knife, then employ the chisel or back end of the putty knife to gently hammer the new sash and glazier's tips into the grooves of the rabbet. Repeat this process in intervals of 10 inches around the frame.

Putty

A baseball that is thrown or a rock that is errant or a falling branch can cause a window pane to crack or break. The majority of windows can be replaced 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. Before installing a replacement double glazed window pane, first take out the old one and clean up the area using a rag and the pull-type paint scraper or an abrasive wood chisel. Wear gloves and safety glasses while you do this work. You'll need a heat gun if the window is glued to the frame.

If you're planning to install your original sash, you must remove the molding that holds the old pane. Then, sand the sash to ensure it's level and ready to be re-caulked. Once the sash is put back in place, you can apply a silicone caulk over the glass. This will ensure that it doesn't leak over time or discolor.

Remove the glazing points from the rabbets, or the grooves in the sash that the glass is. If they're hard to chisel out, try holding a hand tool like a heat gun to soften them before you do. When using a heated tool, make sure to avoid damaging the sash or its railings.

After the old glazing points and putty are removed, prepare a bed for the new pane. Roll a rope made of glazing compound between your fingers and make it about 1/2 inch thick. Then, push it into the rabbets, where the glass will sit. It's important that the glass is positioned against the putty in all places on both sides If you have to, lightly tap the glass into the rabbet with your thumb.

If the new pane is cracked, you can use the silicone caulk or glass glue based on solvents to cover the crack before pressing it into the sash. If the crack isn't sealed, you will require putty to keep the water out. After the putty has dried and the film is oily, wipe it off the glass with a rag and allow it to completely dry before painting. If you paint before the putty is fully dry, it won't create a solid seal and could leak or discolor over time.

Paint

You may be concerned about replacing a broken pane of glass. It's true that replacing a single pane of glass doesn't need to be expensive even if you do it your own. Even a double-paned window could be replaced at a fraction of the cost it costs for a professional.

If you are working with a large glass window first ensure it is securely fixed to the frame. This can be done relatively easy and fast with the appropriate tools and techniques.

Once you're ready to begin, begin by removing the old window pane by prying out the glazing points made of metal that are attached to it. These are tiny metal triangles which act as "nails", holding the window in place. They are placed under a bead or glazing glue that hardens to an unbreakable wedge that holds the frame securely in place and conceals the edges.

After taking off the old pane clean the frame and wood. Scrape away any old paint and sand down the rabbet grooves, where the glazing points used to be. These should be sanded down to bare wood to allow you to paint them the same shade as the rest of the frame. After the sanding process, apply a coat 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 take horizontal and vertical measurements of the entire opening, and also the thickness of the old pane. 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 bring 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.