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How to Replace Window Pane Window Panes

A cracked window pane can be a nuisance. This could be an opportunity to upgrade to energy-efficient windows or insulated ones, and reap advantages like improved comfort, higher resale value and reduced utility bills.

You can do it yourself for a only a fraction of the cost it would cost to employ an expert. It requires the right equipment and an hour or two of your time.

Glass

Replace your old single-paned windows using tempered or insulated glass to increase the efficiency of your energy, reduce noise, and maintain the historic integrity of your old home. The procedure of replacing the window pane is easy and can be completed by homeowners with basic hand tools. In addition to a new pane, the following tools are required: latex glazing putty; Glazier's points; pliers and the use of a heat gun to warm the old putty, if needed. Before starting, put on gloves and safety glasses as working with broken glass can cause injuries.

Remove any broken glass pieces that remain. This can be done with a pair of pliers, however, a flathead screwdriver may be used in the pinch. Make use of a wood chisel or putty knives, to take away any old putty remaining around the frame and window sash. Be careful and slow making sure not to break the existing window sash. It is best to work on a stable ladder rather than the ground, and to have someone stand below the sash in order to help hold it steady.

Prepare the window frame to receive the new pane when you have removed the old putty. To allow for seasonal expansion or contraction by subtracting 1/8 inch from the measurements of width and height. These measurements can be sent to an hardware or home centers store to have an item cut from stock glass to the right size. Alternately, you can cut the glass yourself if have the appropriate tools.

After installing the new pane, run a small bead of caulking around the edge to ensure it is weatherproof. Then, you can install a glazier's pointing on each side of the frame to secure the pane in its place. The points shouldn't be tight enough to cause friction between the frame and the sash, but they should also not be loose.

Before applying the putty on the surface, you must knead it thoroughly until it becomes soft and free from lumps. Then, roll it into pencil-size strips. Place the first strip to the corner of the frame, working from one corner to the next to ensure it is even and smooth.

Glazier's Points

The glazier's points are tiny triangular pieces of metal which help to secure the glass into the window frame without causing any damage to the fragile surface. It's easy to understand how to use this hidden tool and you can save money on the expense of an expert installation.

After taking off the old putty, glazier points and any remnants Clean the frame thoroughly using an utility knife. If needed you can lightly sand the wood in the grooves of the rabbet to smooth rough spots. If you decide to sand wood, cover it with painter's tape to avoid accidental damage.

Take the dimensions of the frame and record precise measurements. Take these dimensions to a hardware store or a home center and request that the new pane cut smaller than the frame's opening. This will ensure that the pane fits comfortably and allows for expansion and contraction.

Place the new pane into the frame and push it in with your hands. Use the chisel's point or the back of the putty blade to smudge the glazier's points, as shown in Figure 11. When you're done taping, they should be flush with the top edge of the pane, and the shoulders of the points should be just below the rabbet's lip. groove.

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

Install the new window sash after the glazing compound has dried. First, coat the wood with a thick layer of linseed. This will stop the new putty from drying out or cracking when it absorbs moisture. 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 putty handle to gently hammer the new sash or glazier's tip into the rabbet grooves. Repeat this process at intervals of 10 inches around the frame.

Putty

A baseball thrown at you or a rock that is errant or a falling branch can cause a window to break or crack. Fortunately, the majority of windows can be replaced by simply placing a new piece of glass in its the proper place. The glass is held into the position with a tiny metal clip, also known as the glazier's point, and putty. This compound is also referred to as glazing compound. Before installing a replacement pane, first take out the old one and clean the area with an abrasive and an abrasive scraper that is a pull type or the wood chisel. Wear protective glasses and gloves while you do this work. If the window is attached to the frame, you'll need to use a heat gun to soften the adhesive prior Replace window Pane to prying it free.

If you plan to reinstall the original sash in the future, take care to remove any pieces of molding that secure the old pane. Sand the sash until it's flat and ready for new caulk. Once the sash is installed then, you can apply a silicone caulk on 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, which is where the glass is. If they're hard to chisel out, you can try holding an instrument like a heat gun to soften them up first. When using a heat tool, be sure to avoid damaging the sash or its railings.

Once the old points of glazing 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, you can press it into the rabbets where the glass will rest. The glass should rest against the putty on both sides. If you need to gently tap your glass into the rabbet using your thumb.

If the new pane has cracked, you can apply a silicone caulk or a glass glue based on solvents to fill in the crack prior to pressing it into the sash. Otherwise, you'll need to apply putty over the crack to form an impervious seal to keep water out. When the putty dries, clean the oily film off the glass using the help of a rag. Allow it to completely dry before painting. Paint after the putty has completely dried. It won't make a strong seal and could leak or discolor with time.

Paint

You might be worried about replacing a broken pane of glass. But the truth is that replacing one glass pane does not have to break the bank when you do it yourself. In fact windows with double panes can be replaced at less than the cost of a professional.

If you are working on a large window, make sure that it is securely attached to the frame. With the right tools and techniques, you can accomplish this task fairly easily and quick.

When you are ready to begin, remove the old window pane replacement pane. Remove the metal glazing points that are attached to it. These are tiny triangles of metal which act as "nails", holding the window within the frame. They are buried beneath a layer of glazing putty that is then cured to form a solid, moulded wedge which holds the window in place and hides the window's points.

After removal of 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 to bare wood, so that you can paint them the same color as the rest the frame. After sanding, apply a layer of flax oil on the bare wood to extend the life of the frame.

Then, you need to measure the width of the window 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 have the exact size for the new pane. This will allow for seasonal changes in the glass. Bring these measurements to your local hardware or home improvement store, and they will have 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.