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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 enjoy benefits such as more comfort, higher the value of resales and lower utility bills.

You can do it yourself at a fraction of what it would cost to hire an expert. You'll need only the right tools and a few hours of your time.

Glass

If your single-pane windows are outdated broken, deteriorating or damaged, replacing them with newer glass that is tempered or insulated can improve energy efficiency and reduce noise while preserving the original character of older homes. The replacement of the window pane is easy and can be accomplished by anyone with basic hand tools. You'll also require a replacement double glazing windows window pane, glazier's tips pliers, and latex glaze putty. If necessary you may make use of a heat gun to warm the old putty. Wear safety goggles and gloves prior to beginning. Working with broken glass could cause serious injuries.

Begin by removing any broken pieces of glass. This is best done using pliers, but a flathead screwdriver can also be used in the pinch. Then, use a wood chisel, or putty knife, to remove the rest of the old putty from around the frame and sash. Be careful and slow and be careful not to damage the old window sash. It is recommended to work on a sturdy ladder rather than the ground and have someone standing below the sash to help keep it steady.

After you have removed all of the old putty, it is time to prepare the window frame to accommodate the new pane. To allow for seasonal expansion or contraction, subtract 1/8 inch each from the measurements of the width and height. Take these measurements to an hardware store or home center and get a piece of stock glass cut to size. You can cut the glass yourself if you possess the right 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. Install a glazier’s point on both sides of the frame. This will secure the pane. The points should not be so tight that they cause friction between the frame and sash, but they also should not be too loose.

Before applying the putty on the surface, knead thoroughly until it becomes soft and free from lumps. Roll it into pencil-sized strips. Place the first strip in the corner of the frame, moving from one corner to the next to ensure it is smooth and even.

Glazier's Points

The glazier's points are the 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 easy to learn how to use this hidden tool and you can save money on the expense of a professional installation.

Once the old putty and glazier's points are removed and the frame is thoroughly cleaned with a utility knife to remove any remaining residue. If needed you can lightly sand Replace Window pane the wood along the grooves of the rabbets to smooth out rough spots. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Note down the dimensions of the frame. 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 comfortably and allows for expansion and contraction.

Place the new pane into the frame and push it into place firmly by using your hands. Then use the point of your chisel, or the back end of the putty knife to make a tap on the glazier's points, as shown in Figure 11. After you're done, the points should be flush with the top edge of the pane. the raised shoulders of the points should be just below the lip of the rabbet groove.

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

Install the new window sash once the glazing compound has dried. First, coat the wood with a heavy coat of Linseed oil. This will stop the new putty from drying out or cracking as it absorbs moisture. Apply the coating using a brush this coat, or the point of the 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 point into grooves of the rabbet. Repeat this process every 10 inches around the perimeter of the frame.

Putty

A hurled baseball, an errant rock or falling branch could cause a window pane to break or crack. Luckily, most windows can be replaced by simply putting a new piece in place. The glass is held in place by small clips made of metal called a glazier's point and putty, often called glazing compound. Before installing a new pane, first take out the old one and clean the area with the help of a rag, the pull-type paint scraper or a wood chisel. Wear gloves and safety glasses while working. If the window is attached to the frame, you'll need to use a heat gun to soften the adhesive prior to taking it off.

If you're planning to install the original sash, remove any pieces of molding that secure the old pane. Sand the sash until it is flat and ready to receive new caulk. Once the sash is re-installed and sanded, apply a fresh silicone caulk around the glass to ensure it will not leak or change color as time passes.

Take the glazing points out of the rabbets and the grooves in the sash, where the glass is. If they're difficult to chisel, use an instrument such as a heatgun over them to allow them to soften before. When using a heated tool, make sure to avoid damaging the sash and its railings.

Make the bed for your new pane after you have removed the old glaze points and putty. Roll a piece of glazing compound between your hands, shaping it to be around 1/2-inch thick. Place it into the rabbets, where the glass will be placed. The glass should rest against the putty on both sides. If you need to, lightly tap your glass into the rabbet using your thumb.

If the new pane has cracked, you can use a silicone caulk or a glass glue that is based on solvents to cover the crack before pressing it into the sash. In other cases, you'll need to putty over the crack to form an airtight seal and keep water out. After the putty is dry, clean the oily film off the glass using a rag and allow it to completely dry before painting. Paint after the putty has dried completely. It will not make a strong seal and could discolor or leak over 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 could be replaced for a fraction of what it will cost a professional.

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

When you are ready to start, remove the old window pane. Pry out the metal glazing points that are attached to it. These are tiny triangles of metal that function as "nails", holding the window within the frame. They are placed under a bead or glazing putty which hardens into solid wedge that holds the wood frame securely in place and hides the sharp edges.

After removal of the old pane clean the frame and wood. Scrape off any paint and sand down the rabbet grooves where the glazing points were. These should be sanded to bare wood to allow you to paint them the same shade as the rest of the frame. After sanding the wood then apply a layer of flax oil. This will help to extend its life.

Next, measure the dimensions 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 get a precise size for the new pane. This will also allow for expansion and contraction of the glass in times of seasonal changes. Take these measurements to the 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.