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How to replace Window pane Window Panes

A damaged or cracked window is an issue. It can also be a chance to upgrade your glass to energy-efficient or insulated windows to benefit from improved comfort, increased the value of resales and lower utility costs.

You can do it yourself at less than 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 insulation glass to improve the efficiency of your energy, reduce noise, and maintain the historic integrity of your old home. The process of replacing the window pane is easy and can be completed by homeowners with basic hand tools. You will also require an additional window pane, glazier's tips, pliers, and latex glaze putty. If needed you may use a heatgun to warm the old putty. Before starting, wear gloves and safety glasses as working with broken glass may cause injuries.

Take out any broken glass pieces that remain. This can be done with a pair of pliers, though using flathead screwdrivers can be used in the pinch. Then, use a wooden chisel or putty knife to remove the rest of the old putty from the frame and sash. Take your time and work slowly and be careful not to break the current window sash. It is a good idea to work using a sturdy ladder rather than on the ground and to have someone stand below the sash to help hold it steady.

Make sure the window frame is ready to receive the new pane once you have removed the old putty. Find the width and the 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 a piece cut of glass stock to the proper size. Alternatively, you can cut the glass yourself, if you have the appropriate tools.

After installing the new glass After installing the glass, apply some caulking around the edge. This will make the glass weatherproof. 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 frame and sash however they should not be too loose.

Before putting the putty on, make sure to knead it until it is smooth and free of lumps. Roll it into pencil-sized strips. Apply the first strip to the corner of the frame. Work from one corner to the next and ensure that it is even and smooth.

Glazier's Points

The glazier's facets are small triangular pieces which help to secure glass into a window pane replacement frame without scratching or damaging the delicate surface. Learning how to use these tiny helpers is simple and can save you money on professional installation or the cost of new glass.

Once the old putty and the glazier's points have been removed and the frame is thoroughly cleaned using a utility knife to get rid of any remaining traces. Lightly sand the frame in the rabbet grooves to smooth out rough areas. If you do sand your wood, make sure to protect it with painter's tack to avoid accidental damage.

Write down the dimensions of the frame. Take these dimensions to an hardware store or home center, and have the new pane made slightly smaller than the frame's opening. This will ensure a tight fit and leave room for expansion and contraction.

Insert the new pane into the frame and push firmly with your hands. Utilize the chisel's point, or the back of the putty knife to smudge the glazier's points, as shown in Figure 11. The glazier's point should be aligned with the top edge of the pane and the shoulders should be just below the lip.

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

After the glazing compound dries, you're ready to install the new window sash. The first step is to coat the wood with a heavy coat of linseed oil. This will prevent the new putty drying out or cracking due to the moisture it absorbs. Use a brush to apply this coat, or even 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 hit the new sash, or glazier's point into grooves of the rabbet. Repeat this process in intervals of 10 inches around the frame.

Putty

A baseball hit or a rock thrown in error or a branch falling could result in a broken or cracked window pane. The majority of windows can be repaired easily by installing a new piece. The glass is held in place with tiny metal clips known as a glazier's point and putty, also called glazing compound. Before installing a replacement pane, first get rid of the old one and clean the area using an abrasive and an abrasive scraper that is a pull type or an abrasive wood chisel. Wear safety glasses and gloves when you work. You'll need a heat gun if the window is glued to the frame.

If you are planning to reinstall your original sash, you must remove the molding that holds the old pane. Sand the sash until it is flat and ready for new caulk. After the sash has been re-installed and sanded, apply a fresh silicone caulk to the glass to ensure that it won't leak or discolor as time passes.

Remove the glazing points from the rabbets, the grooves in the sash, where the glass sits. If they're hard to chisel, hold the hand tool, such as a heating gun over them to soften first. If you're using a heat gun, be cautious not to scratch the railings of the sash or the sash itself by holding the tool too tightly.

Make a bed for your new pane after removing the old putty and glazing points. Roll a rope with glazing compound between your fingers, and make it about 1/2 inch thick. Then, press it into the rabbets, where the glass will rest. It is crucial that the glass sits on the putty in all places on both sides If you have to do so, gently tap the glass into the rabbet using your thumb.

If the new pane has a crack then you can seal it with a solvent-based glue or silicone caulk before pressing it into the sash. If the crack is not sealed, you'll need to use putty to keep water out. After the putty has dried, clean the oily film off the glass with a rag and allow it to completely dry before painting. If you paint before the putty has completely dry, it won't create a strong seal and may discolor or leak over time.

Paint

If you've suffered a break in a window pane, you might be concerned about the expense of a new one. But the truth is that replacing a single glass pane doesn't require a huge amount of money when you do it yourself. In fact, even a double-pane window can be replaced for less than the cost of an expert.

If you're working with a large glass window first ensure it is securely fixed to the frame. This can be made relatively simple and fast with the right tools and techniques.

When you're ready to start taking off the old window pane by removing the glazing points of metal that are connected to it. These are small metal triangles that function as "nails" that hold the window within the frame. They are placed under a bead of glazing putty, replace Window pane which hardens into a solid, molded wedge that holds the window firmly in place and conceals the points.

After you have removed the old pane taken away Clean up the frame and wood. Scrape off any old paint, and sand the rabbet grooves in which the glazing points were placed. Sand them to bare wooden surfaces, allowing you to paint the frames the same shade. After the sanding process, apply a coat of flax oil to the wood's surface to prolong its life.

The next step is to determine the width of the window opening. You'll need to take vertical and horizontal measurements of the entire opening and also the thickness of the old pane. To determine the exact size of the new pane subtract 1/8 inch from both measurements. This will also allow for expansion and contraction of the glass during seasonal change. Bring these measurements to the hardware or home improvement store and ask them to cut you 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.