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How to replace window pane Window Panes

A damaged or cracked window is an inconvenience. This could be an opportunity to upgrade to energy-efficient windows or insulated ones, and reap benefits such as improved comfort, increased resale value and reduced utility costs.

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

Glass

If your single-pane windows are outdated damaged, cracked or deteriorating replacing them with modern insulated or tempered glass can improve energy efficiency and reduce noise while maintaining the historic integrity of older homes. The process of replacing the window pane is simple and can be done by most homeowners who possess basic hand tools. You'll also require a replacement windows prices window pane, glazier's suggestions, pliers, and latex glaze putty. If needed, you can use a heatgun to warm the old putty. Before starting, wear gloves and safety goggles as working with broken glass could cause injuries.

Begin by removing any remaining broken pieces of glass. This is best done using a pair of pliers, though using flathead screwdrivers can work in the pinch. Utilize a wood chisel or putty knives, to take away any remaining old putty around the frame and the window sash. Be careful not to break the window sash. Be careful and slow. This can be done best on a ladder, not on the ground. Also, ensure that someone below the sash hold it steady.

Prepare the window frame to accommodate the new pane once you have removed the old putty. Take measurements of 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 taken to an hardware or home centers store to have cut a piece of glass that is in stock to the correct size. You can also cut the glass yourself if you have the appropriate tools.

After putting the new pane in place, run a small bead of caulking around the edge to seal it against weather. Install a glazier's point on both sides of the frame. This will help secure the pane. The points shouldn't be so tight as to cause friction between the sash and the frame but they should not be too loose.

Before applying the putty to the surface, gently knead it until it is soft and free from lumps. Then make it into pencil-sized strips. The first strip should be placed to the corner of the frame, working from one corner to another so that it is even and smooth.

Glazier's Points

The glazier's facets are tiny triangular pieces of steel which help to secure glass into the frame of a window without damaging or scratching 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 new glass.

Once the old putty and the glazier's point are gone and the frame is thoroughly cleaned with a utility knife to get rid of any remaining residue. If needed it is necessary to lightly sand the wood in the rabbet grooves to smooth out rough spots. If you sand wood, protect it with painter’s tape to prevent accidental damage.

Measure the empty frame's dimensions and write down accurate measurements. Bring these measurements to an hardware store or home center and have the new pane made slightly smaller than the frame's opening. This will ensure that the pane fits comfortably and allows for expansion and contraction.

Place the new window in the frame and push it into place firmly by using your hands. Then, you can use the point of your chisel, or the back of the putty knife to pierce the glazier's points as illustrated in Figure 11. The glazier's points should be in line with the top edge of your pane and the shoulders should be just beneath that lip.

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

Install the new window sash when the glazing compound has dried. First, coat the wood with an even layer of linseed. This will keep the new putty from soaking up moisture and drying out and cracking with time. Use a brush to apply this coat, or the tip of the putty blade. Then, use the chisel on the back of the putty tool or the back of the handle to gently hammer the new sash or glazier's tip into the grooves of the rabbet. Repeat this process at intervals of 10 inches all around the frame.

Putty

A baseball hit, a rock thrown in error, or a tree falling could result in a broken or cracked window. Fortunately, the majority of windows can be replaced by simply putting a new piece in the proper place. The glass is held into the position with a tiny metal clip, referred to as the glazier's point, and Replace Window Pane putty. This compound is also known as glazing compound. Remove the old pane and clean the area using the rag, a scraper that is a pull type or a wood chisel. Wear gloves and safety glasses while working. If the window is attached to the frame, you'll need make use of a heat gun to soften the adhesive prior to taking it off.

If you're planning to reinstall the original sash, take off the mold that holds the old pane. Then you can sand the sash down to ensure it's level and ready for new caulk. Once the sash is installed, apply a new caulk made of silicone around the glass to ensure it doesn't swell or fade as time passes.

Remove the glazing points from the rabbets and the grooves in the sash that the glass sits. If they're hard to chisel, hold an instrument such as a heatgun over them for a few minutes to soften them. If you're using a heat gun, be cautious not to cause damage to the railings or sash by placing the tool too tightly.

Prepare a bed for your new pane by removing the old glaze points and putty. Roll a piece of glazing compound between your hands, and form it to be around 1/2-inch thick. Press it into the rabbets, where the glass will be placed. It's important that the glass is positioned against the putty in all places on both sides, so if you need to, lightly tap the 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 seal the crack before pressing it into the sash. If not, you'll have to apply putty on the crack to create an impervious seal to keep water out. After the putty has dried then clean the oily film off the glass with an abrasive and allow it to completely dry before painting. If you paint before the putty is completely dry, it won't form a solid seal and could discolor or leak over time.

Paint

If you've suffered a break in a window pane, then you may be worried about the expense of replacing it. In reality, replacing a single pane of glass doesn't have to be costly if you do it on your own. In fact windows with double panes can be replaced for only a fraction of the cost of a professional.

If you are working on a large window, make sure that it is securely fixed to the frame. This is relatively easy and fast with the appropriate tools and techniques.

When you're ready to start with the removal of the old window pane by removing the metal glazing points that are attached to it. These are basically small metal triangles that act as "nails" that keep the window in in the wood frame. They are submerged beneath a bead or glazing glue which hardens into an unbreakable wedge which holds the wood frame securely in place and hides the points.

After you have removed the old pane taken away clean the surrounding frame and wood. Scrape off any old paint and sand the rabbet grooves in which the glazing points were. These should be sanded to bare wood, so that you can paint them the same color as the rest of the frame. After the sanding process, apply a coat of flax oil on the bare wood to extend the life of the frame.

Then, take measurements of the dimensions of the window's opening. You will 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 you have the exact size for the new pane. This will allow for seasonal changes in the glass. Take these measurements to a 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.