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How to Replace Window Panes

A damaged or cracked window is a nuisance. It could also be an opportunity to upgrade your glass to energy-efficient or insulated windows to enjoy benefits such as improved comfort, increased resale value and reduced utility bills.

This is a project you could take on yourself for only a fraction of the cost of hiring an expert. It requires the right tools and only an hour or two of your time.

Glass

If your single-pane windows are old, deteriorating or broken, replacing them with newer glass that is tempered or insulated will increase energy efficiency and reduce noise while also preserving the original character of older homes. Most homeowners with basic hand tools can repair windows with ease. You'll also require an additional window pane, glazier's tips, pliers, and latex glaze putty. If you need to, you can use a heatgun to warm the old putty. Before beginning, wear gloves and safety glasses as working with broken replacement glass in windows may cause injuries.

Begin by removing any broken pieces of glass. It is recommended to use pliers however, a flathead may be used equally. Make use of a wood chisel or putty knife to get rid of any old putty that remains around the frame and window sash. Take your time and work slowly, taking care not to break the current window replacement glass sash. It is a good idea to do this using a sturdy ladder rather than the ground and have someone standing below the sash to help hold it in place.

Make sure that the window frame is ready to receive the new pane when you have removed the old putty. Take measurements of the width and height of the sash opening by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Take these measurements to an hardware store or home center, and get a piece of stock glass cut to size. Alternately, you can cut the glass yourself, if you have the appropriate tools.

After installing the glass, apply some caulking around the edge. This will make the glass weatherproof. Then install a glazier's point on each side of the frame to secure the pane in place. The points shouldn't be too tight that they create friction between the frame and sash but they shouldn't be too loose.

Before applying the putty to the surface, knead thoroughly until it is smooth and free of lumps. Cut it into pencil-sized pieces. Apply the first strip to the frame's corner. Work from one corner to another to ensure it's even and smooth.

Glazier's Points

The glazier's points are small triangular metal pieces which help to secure the glass into the window frame without causing any damage to the fragile surface. It's easy to learn how to use this secret tool, and you'll save money on the expense of an installation by a professional.

After the old putty and the glazier's points have been removed Clean the frame thoroughly with a utility knife to remove any remaining traces. If needed you can lightly sand the wood in the grooves of the rabbet to smooth out rough spots. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Take the dimensions of the frame and write down accurate measurements. Bring these measurements to a hardware store or home center and request that the new pane cut slightly smaller than the frame's opening. This will ensure that the pane fits comfortably and allows for expansion and contraction.

Place the new pane in the frame and push firmly with your hands. Make use of the point of the chisel, or the back of the putty blade to smudge the glaziers' points as shown in Figure 11. The glazier's point should be aligned with the top edge of the pane and the shoulders raised should be just beneath that lip.

Apply a small amount of glazing compound on 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 completely.

Install the new window sash when the glazing compound has dried. The first step is to coat the wood with a thick layer of linseed. This will prevent the new putty from sucking up the moisture and drying out and cracking with time. Apply this coat with a brush or the tip of your knife, and then use the chisel or the back end from the putty knife to gently hammer in the new sash and glazier's points into the rabbet grooves. Repeat this process in intervals of 10 inches all around the frame.

Putty

A baseball hit, a rock thrown in error, or a fallen tree could result in a broken or cracked window pane. Most windows can be replaced by simply putting in a fresh piece. The glass is held in place by a small metal clip, referred to as a glazier’s point and putty. This compound is also called glazing compound. Before you install a new pane, first remove the old one and clean up the area using an abrasive and an abrasive scraper that is a pull type or the wood chisel. Wear protective glasses and gloves while you do this work. If the window is attached to the frame, you'll have to employ a heat gun in order to soften the adhesive prior to taking it off.

If you're planning to reinstall the original sash, take off the molding that holds the old pane. Then, sand the sash to ensure it's smooth and ready for new caulk. Once the sash is put back in place, you can apply a silicone caulk to the glass. This will ensure that it won't get soiled or discolor over time.

Take out the glazing points in the rabbets. These are the grooves on the sash, which is where the glass is. If they're hard to chisel out, you can try holding a hand tool like a heat gun over them to soften them first. When using a heating tool, be sure to avoid damaging the sash and its railings.

After 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 to be around 1/2-inch thick. Then, push it into the rabbets, where the glass will sit. It is essential that the glass is positioned against the putty in all places on each side So if you have to do so, gently tap the glass into the rabbet with your thumb.

If the new pane is cracked you can fill it with a solvent-based glass glue or silicone caulk before pressing it into the sash. If the crack is not sealed, you'll need to apply putty to keep the water out. After the putty has dried clean the oily film off the glass and allow it to dry completely before painting. If you paint before the putty is completely dry, it won't form a solid seal and could leak or discolor in time.

Paint

If you've suffered a break in a window pane, you may be worried about the expense of replacing it. However, replacing one glass pane does not have to break the bank when you do it yourself. Even double-paned windows can be replaced for a fraction of what it costs an expert.

If you are working on a large window, make sure it is securely fastened to the frame. By using the correct tools and techniques you can complete this task easily and quick.

If you're ready to begin, begin by removing the old window by prying out the metal glazing points that are attached to it. These are tiny triangles of metal that function as "nails" to hold the window in the frame. They are buried beneath a glaze putty or bead that sets to form a solid wedge that holds the wood frame in place and hides the sharp edges.

After taking off the old pane clean the frame and wood. Scrape away any paint and sand down the rabbet grooves, where the glazing points used to be. They should be sanded to bare wood, so that you can paint them the same shade as the rest of the frame. After sanding, apply a coat of flax oil on the wood's surface to extend the life of the frame.

Then, take measurements of the dimensions of the window replacements Near me's opening. You will need to measure the vertical and horizontal 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 bring these measurements to a hardware store or home improvement shop and get 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.