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How to Replace Window Panes

A damaged window pane can be a nuisance. It could also be a chance to upgrade your glass to energy-efficient or insulated windows, and benefit from improved comfort, increased potential for resales, and less bills.

It's a project you can tackle yourself at a fraction of the cost of hiring a professional. You only need the proper tools and a few hours of your time.

Glass

If your single-pane windows are old, deteriorating or broken, replacing them with newer insulated or tempered glass can increase energy efficiency and reduce noise while maintaining the historic integrity of older homes. The replacement windows cost of a window pane is relatively easy and can be accomplished by most homeowners who possess basic hand tools. You will also require an extra upvc window lock replacement pane, glazier's tips, pliers, and latex glazing putty. If you need to you can use a heatgun to warm the old putty. Wear safety glasses and gloves prior to starting. Working with broken glass could result in serious injuries.

Take away any broken glass pieces that remain. It is best to use pliers for this, but a flathead can work equally. Then, use a wooden chisel or putty knife remove the rest of the old putty from the frame and sash. Be careful and slow, taking care not to break the current window sash. It is a good idea to work on a sturdy ladder rather than on the ground, and to have someone stand below the sash to help keep it steady.

After you have removed all the old putty, prepare the window frame to fit the new pane. Take measurements of the width and height of the sash opening and subtract 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 get cut a piece of glass stock to the proper size. Alternatively, you can cut the glass yourself if you have the tools you need.

After installing the new pane After installing the new pane, apply a small amount of caulking around the edges to seal it against weather. Then install a glazier's point on each side of the frame to hold the pane in place. The points should not be so tight as to cause friction between the sash and the frame however they shouldn't be loose.

Before applying the putty on the surface, knead thoroughly until it becomes soft and free of lumps. Roll it into pencil-sized strips. The first strip should be glued to the frame's corner. Work from one corner to another and ensure that it is even and smooth.

Glazier's Points

The glazier’s points are small triangular metal pieces that allow glass to be secured into the window frame without causing any damage to the fragile surface. Learning how to use these tiny helpers is simple and could save you money on a professional installation or the cost of new glass.

After taking off the old putty, glazier points, and any other leftovers clean the frame thoroughly using a utility knife. Lightly sand the wood in the rabbet grooves to smooth rough areas. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Measure the empty frame's dimensions and write down accurate measurements. These measurements can be taken to the hardware or home center store, and the new frame will be cut slightly smaller. This will ensure that the pane fits perfectly and allows for expansion and contraction.

Insert the new pane into the frame and push it in using your hands. Then, use the tip of your chisel, or the back of the putty knife to pierce the glazier's points, as shown in Figure 11. The glazier's points should be flush against the top edge of your pane, and the shoulders should be just below the lip.

Apply a thin layer of glazing compound on the rabbet grooves and the edges of new glass. This will protect and seal the edges. Allow it to dry and cure fully.

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 prevent the new putty from soaking in the moisture and deteriorating and cracking with time. Use a brush to apply this coat, or even the tip of the putty blade. Then, use the chisel on the back of the tool or the back of the putty handle to gently smash the new sash or glazier's point into the rabbet grooves. Repeat this process in intervals of 10 inches all around the frame.

Putty

A hurled baseball or an unintentional rock, or a falling branch can cause a window pane to break or crack. Most windows can be replaced by putting in a new piece. The glass is held in place by a small metal clip, referred to as the glazier's point, and putty. This compound is also called glazing compound. Remove the old pane and clean the area with the rag, a pull-type scraper, or a wood chisel. Wear protective glasses and gloves when you work. If the window is attached to the frame, you'll have to make use of a heat gun to soften the adhesive prior to taking it off.

If you are planning to replace the original sash in the future, take care to remove the molding pieces that hold the old pane in place. Sand the sash until it's flat and ready for new caulk. After the sash has been put back in place then, you can apply a silicone caulk over the glass. This will ensure that it won't leak over time or discolor.

Remove the glazing points from the rabbets. These are the grooves in the sash, which is where the glass is located. If they're hard to chisel, use a hand tool such as a heating gun over them to soften first. When using a heated tool, be careful to not scratch the sash and its railings.

Create the bed for your new pane by removing the old putty and glazing points. Roll a rope with glazing compound between your fingers and then make it about 1/2 inch thick. Then, push it into the rabbets in which the glass will rest. The glass must rest against the putty on both sides. If you need to you want to tap your glass lightly into the rabbet using your thumb.

If the new pane is cracked, you can use a silicone caulk or a glass glue that is based on solvents to cover the crack prior to pressing it into the sash. If the crack isn't sealed, you'll need to apply putty to keep water from getting in. Once the putty is dry, wipe the oily film from the glass and let it dry completely before painting. Paint before the putty is completely dry. It will not form a good seal and could discolor or leak over time.

Paint

If you've had a broken window pane, then you may be worried about the expense of a new one. It's true that replacing a single pane of glass doesn't have to be expensive if you do it on your own. Even double-paned windows can be replaced at a fraction of the cost it will cost for a professional.

If you are working on a large-sized window, make sure it is securely attached to the frame. This is relatively easy and quick with the right tools and techniques.

When you are ready to begin taking down the old window pane. Remove the glazing points made of metal that are attached to it. These are essentially small metal triangles that function as "nails" which hold the window in in the wood frame. They are submerged beneath a glaze putty or bead that hardens to solid wedge which holds the wood frame in place and conceals the edges.

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

Next, measure the size of the window opening. You'll need to take horizontal and vertical measurements of the entire opening, as well as the thickness of the old pane. Subtract 1/8 inch from each measurement to ensure that you get the exact measurement for the new pane. This will also allow for expansion and contraction of the glass during seasons of change. You can bring these measurements to a hardware or home improvement shop and have the glass cut for you.

Now, it's time to bed the new window glass replacements near Me 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.