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How to Replace Window Panes

A damaged or cracked window can cause a lot of trouble. It could also be an opportunity to upgrade your glass to energy efficient or insulated windows, and reap benefits like greater comfort, a higher the value of resales and lower utility costs.

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

Glass

Replace your old single-paned windows with tempered or insulation glass to improve energy efficiency, reduce noise, and protect the historical integrity of your home's older. The process of replacing a window pane is relatively easy and can be accomplished by homeowners with basic hand tools. You will also require an extra window pane, glazier's tips, pliers, and latex glaze putty. If necessary you can make use of a heat gun to warm the old putty. Before starting, wear gloves and safety glasses as working with broken glass may cause injuries.

Take away any broken glass pieces remaining. It is recommended to use pliers, but a flathead can work equally. Then, use a wooden chisel, or putty knife, to remove the remaining old putty from around the frame and sash. Be careful to not damage the window sash. Be careful and slow. It is best to work using a sturdy ladder instead of the ground and place someone on the sash to help keep it in place.

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 in the sash, subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Bring these measurements to a hardware store or home center and get a piece of stock glass cut to size. You can also cut the glass by yourself if you possess the right tools.

After putting in the new glass Apply a small amount of caulking on the edges. This will make the glass weatherproof. Install a glazier's point on both sides of the frame. This will secure the pane. The points shouldn't be so tight that they cause friction between the sash and frame, but they also shouldn't be too loose.

Before applying the putty to the surface, knead thoroughly until it is soft and free of lumps. Then you can roll it into pencil-sized strips. The first strip should be glued to the frame's corner. Work from corner to corner, making sure it is even and smooth.

Glazier's Points

The glazier's points are small triangular pieces of metal that allow glass to be secured to the frame without damaging the delicate surface. It's easy to learn how to use this hidden tool, and you'll save money on the expense of an expert installation.

After removing the old putty, glazier points and replacement Window handle any leftovers, clean the frame thoroughly with an utility knife. If needed you can lightly sand the wood along the grooves of the rabbets to smooth rough spots. If you sand wood, protect it with painter’s tape to avoid accidental damage.

Write down the exact dimensions of the frame. These measurements can be taken to an hardware or home centers store, and the new frame will be cut a bit smaller. This will ensure a secure fit, and allow for expansion and contraction.

Insert the new pane into the frame and press it down using your hands. Utilize the chisel's point, or the back of the putty knife to tap the glaziers' points as illustrated in Figure 11. The glazier's point should be in line with the top edge of the pane and the shoulders raised should be just beneath that lip.

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

After the glazing compound dries and the glazing compound is dry, you can install the new window sash. The first step is to coat the wood with an even layer of linseed. This will prevent the new putty drying out or cracking when it absorbs moisture. Apply the coating using a brush this coat, or the point of the putty blade. Then, use the chisel that is on the back of the putty tool or the back of the handle to gently hammer the new sash or glazier's point 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 fallen branch can cause a window pane to crack or break. Luckily, most windows can be replaced by simply placing a new piece of glass in its the right place. The glass window replacement is held in place by tiny metal clips known as a glazier's point, and putty, often called 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 protective glasses and gloves while working. If the window is attached to the frame, you'll need to employ a heat gun in order to soften the adhesive before prying it free.

If you are planning to replace the original sash, remove any molding pieces that are used to secure the old pane. Sand the sash until it is flat and ready to receive new caulk. After the sash has been installed, you can apply a silicone caulk to the glass. This will ensure that it won't get soiled or discolor over time.

Remove the glazing points from the rabbets, or the grooves in the sash, where the glass sits. If they're difficult to chisel, use the hand tool, such as a heatgun over them to soften first. If you're using a heat gun, be careful not to scratch the sash or its railings by using the tool too tightly.

Once the old glazing points and putty have been removed prepare a bed for the new pane. Roll a piece of glazing compound between your hands, and form it to be about 1/2-inch thick. Press it into the rabbets where the glass will be put. It is crucial that the glass sits on 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 damaged, you can use a silicone caulk or glass glue made from solvents to cover the crack before pressing it in the sash. In other cases, you'll need to putty over the crack to create 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 dry completely before painting. If you paint before the putty has completely dry, it won't create an effective seal and could leak or discolor in time.

Paint

You may be concerned about replacing a broken piece of glass. In reality, replacing a single pane of glass doesn't have to be costly if you do it on your own. Even a double-paned replacement window handle (My Web Site) can be replaced for a fraction of the price it would cost for a professional.

First, if you are working on a large window, ensure that it is securely fixed to the frame. Using the proper tools and techniques you can make this task relatively easy and quick.

When you are ready to start with the removal of the window pane. Pry out the metal glazing points that are attached to it. They are basically tiny metal triangles which function as "nails" that hold the window in place in the wood frame. They are submerged beneath a bead or glazing putty that sets to form a solid wedge that holds the wood frame firmly in position and conceals the edges.

After removal of the old pane clean the frame and the 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 sanding the wood you can apply a layer flax oil. This will help to extend its life.

Next, measure the size of the window opening. You'll need to determine the vertical and horizontal dimensions of the entire opening as well as the thickness. Subtract 1/8 inch from each measurement to ensure you get a precise size for the new pane. This will allow for seasonal changes in the glass. 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 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.