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How to Replace Window Panes

A cracked window pane can cause a lot of trouble. It can also be a chance to upgrade your glass to energy-efficient or insulated windows, and reap benefits like improved comfort, increased resale value and reduced utility costs.

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

glass window replacements

Replace your single-paned windows with tempered or insulated glass to increase energy efficiency, cut down on noise, and maintain the historic integrity of your old home. The majority of homeowners with basic hand tools can repair a window pane. You will also need a replacement window pane, glazier's tips, pliers, and latex glazing putty. If needed, you can use a heatgun to warm the old putty. Before beginning, wear gloves and safety goggles as working with broken glass may cause injuries.

Begin by removing any remaining broken pieces of glass. This can be done with a pair of pliers, though using flathead screwdrivers can be effective in a pinch. Use a wood chisel, or putty knives, to take away any old putty that remains around the frame and the window sash. Be careful and slow and be careful not to break the current window sash. This should be done on an elevated ladder, not on the ground. Also, you should have someone lower to keep it in place.

Make sure that the window frame is ready to accommodate 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). Take these measurements to an hardware store or home center and have a piece of stock glass cut to size. You can also cut the glass yourself if have the right tools.

After putting the new pane in place after installing the new pane, put a tiny amount of caulking around the edges to ensure it is weatherproof. Then install a glazier's point on each side of the frame to hold the pane in its place. The points shouldn't be too tight that they cause friction between the frame and sash, but they should also not be loose.

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

Glazier's Points

The glazier's points are the small triangular pieces that help secure glass into a window frame without damaging or scratching the delicate surface. Understanding how to use these little helpers is easy and can save you money on a professional installation or the cost of buying new glass.

After removing the old putty, glazier points and any residue Clean the frame thoroughly using a utility knife. If needed you can lightly sand the wood along the grooves of the rabbet to smooth out rough spots. If you do sand the wood, make sure to protect it by using painter's tape to prevent accidental damage.

Measure the empty frame's dimensions and record precise measurements. Take these dimensions to a hardware store or home center, and have the new pane cut smaller than the frame's opening. This will ensure a secure fit, and allow for expansion and contraction.

Place the new pane in the frame and press it in place with your hand. Use the chisel's point or the back of the putty blade to smudge the glaziers' points as illustrated in Figure 11. When you're done taping, they should be level 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 bead of glazing compound over the edges of the glass that has been made and into the rabbet grooves, to seal and protect them. Allow this to dry and cure fully.

Install the new window sash after the glazing compound has dried. First, saturate the wood with a thick coat of linseed oil. This will stop the new putty from drying out or cracking as it absorbs moisture. Use a brush to apply this coat, or the tip of the putty blade. Then use the chisel on the back of the tool or the back of the handle to gently hit the new sash, or glazier's tip into the grooves of the rabbet. Repeat this process in intervals of 10 inches all around the frame.

Putty

A hurled baseball or a rock that is errant or a fallen branch can cause a window to break or crack. Fortunately, the majority of windows can be easily replaced by simply placing a new piece of glass in its place. The glass is held into the position with a tiny metal clip, called the glazier's point, and putty. This compound is also called glazing compound. Before installing a replacement glass for window near me pane, first remove the old one and clean the area with an abrasive and an abrasive scraper that is a pull type or the wood chisel. Wear gloves and safety glasses while working. If the window is glued to the frame, you'll need to make use of a heat gun to soften the adhesive before prying it free.

If you're planning to install your original sash, remove the mold that holds the old pane. Sand the sash until it is flat and ready for new caulk. Once the sash is installed then, apply a new caulk made of silicone around the glass to ensure that it will not leak or change color as time passes.

Remove the glazing points from the rabbets, the grooves in the sash that the glass sits. If they're difficult to cut out, you can try holding a hand tool like a heat gun to soften them first. If you're using a heat gun, be cautious not to cause damage to the sash or its railings by holding the tool too close.

Once the old glaze 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 into a 1/2-inch thick. Then, you can press it into the rabbets in which the glass will sit. It is crucial that the glass is positioned against the putty on each side, so if you need to tap it, gently press the glass into the rabbet using your thumb.

If the new pane is cracked you can fill it with a solvent-based glue or silicone caulk prior to pressing it into the sash. If not, you'll have to putty over the crack to form an impervious seal to keep water out. When the putty dries, clean the oily film off the glass using the help of a rag. Allow it to completely dry before painting. If you paint before the putty is fully dry, it won't create a strong seal and may discolor or leak over time.

Paint

You might be worried about replacing a broken pane of glass. But the truth is that replacing one glass pane does not need to cost a fortune If you can do it yourself. Even a double-paned window can be replaced at a fraction of the cost it costs for a professional.

If you are working with large glass windows glass replacement first ensure it is securely fixed to the frame. This task can be made relatively simple and fast with the right tools and techniques.

When you are ready to start, remove the old window pane. Remove the glazing points made of metal that are attached to it. These are small metal triangles that act as "nails" to hold the window within the frame. They are buried under a bead of glazing putty, which transforms into a solid molded wedge which holds the window in place and hides the edges.

After you have removed the old pane taken away, clean up the surrounding frame and wood. Scrape off any paint and sand down the rabbet grooves, where the glazing points used to be. These should be sanded down to the point of being bare, to allow you to paint them the same shade as the rest of the frame. After sanding, apply a coat of flax oil on the wood that is not sanded down to extend the life of the frame.

Then, take measurements of the dimensions of the window's 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 allow for seasonal changes in the glass. You can take these measurements to a hardware or home improvement shop and get the glass cut for you.

Now, it's time to bed the new window sash replacement 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.