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How to Replace Window Panes

A damaged window pane can be an issue. It can also be an opportunity to upgrade your glass to energy-efficient or insulated windows to benefit from 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 employ an expert. You only need the proper tools and a few minutes of your time.

Glass

If your single pane windows are old damaged, cracked or deteriorating, replacing them with newer insulated or tempered glass can increase energy efficiency and reduce noise while preserving the historical integrity of older homes. The procedure of replacing the window pane is easy and can be completed by most homeowners who possess 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 beginning, wear gloves and safety glasses as working with broken glass may cause injuries.

Take out any broken glass pieces remaining. It is recommended to use pliers, but a flathead can work as well. Utilize a wood chisel or putty knives to remove any old putty remaining around the frame and the window sash. Be careful to not scratch the window sash. Work slowly and carefully. This can be done best on a ladder, not on the ground. Also, have someone below the sash keep it in place.

After you have removed all the old putty, you can prepare the window frame to fit the new pane. To allow for seasonal expansion or contraction by subtracting 1/8 inch from the measurements of the width and height. These measurements can be taken to an hardware or home centers store to get cut a piece of glass that is in stock to the correct size. You can cut the glass yourself if you have the right 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 secure the pane. The points shouldn't be so tight that they create friction between the sash and frame however they should not be too loose.

Before applying the putty make sure to knead it until it is soft and free of lumps. Make it into pencil-sized strips. Place the first strip in the corner of the frame, working from one corner to another to ensure it is smooth and even.

Glazier's Points

The glazier's points are the small triangular pieces which help to secure glass into frames for windows without scratching or damaging the fragile surface. Knowing how to use these tiny helpers is simple and can save you money on professional installation or the cost of buying new glass.

After the old putty and the glazier's points have been removed, thoroughly clean the frame with a utility knife to get rid of any remaining traces. Lightly sand the wood in the rabbet grooves, if necessary, to smooth out rough areas. If you do sand your wood, be sure to protect it with painter's tape to avoid accidental damage.

Measure the empty frame's dimensions and note down precise measurements. Take these dimensions to a hardware store or a home center and have 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.

Insert the new pane into 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 glazier's points as illustrated in Figure 11. The glazier's points should sit in line with the top edge of the pane and the raised shoulders should be just below 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 this to dry and cure completely.

Once the glazing compound has dried and the glazing compound is dry, you can install the new window sash. First, coat the wood with a thick coat of Linseed oil. This will prevent the new putty from taking in the moisture and drying out and cracking over time. Apply the coating using a brush 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 the rabbet grooves. Repeat this procedure every 10 inches around the perimeter of the frame.

Putty

A baseball thrown at you, an errant rock or a fallen branch can cause a window to crack or break. The majority of windows can be replaced easily by putting in a new piece. The glass is held in place by a small metal clip called a glazier's point and putty, also called glazing compound. Before installing a replacement pane, first remove the old one and clean the area using the help of a rag, an abrasive scraper that is a pull type or a wood chisel. Wear gloves and safety glasses when working. You'll need a heating gun in the event that the window is glued into the frame.

If you're planning to replace window Pane your original sash, remove the molding that supports the old pane. Sand the sash until it's flat and ready for new caulk. Once the sash is reinstalled it is possible to apply a silicone caulk on the glass. This will ensure that it doesn't get soiled or discolor over time.

Remove the glazing points from the rabbets, the grooves in the sash where the glass is. If they're difficult to work out, try holding an instrument like a heat gun to soften them before you do. If you're using a heating gun, be cautious not to cause damage to the sash or its railings by placing the tool too closely.

Once the old glaze points and putty have been removed make a bed for the new pane. Roll a rope of glazing compound between your fingers and make it around 1/2 inch thick. Then, you can press it into the rabbets in which the glass will be. It's important that the glass is positioned against the putty in all places on each side, so if you need to tap it, gently press the glass into the rabbet with your thumb.

If the new pane has damaged, you can use the silicone caulk or glass glue made from solvents to cover the crack prior to pressing it into the sash. If the crack is not sealed, you'll require putty to keep water out. Once the putty is dry remove the oily film off the glass and allow it to dry completely before you paint. Paint before the putty is completely dry. It will not form a good seal and may discolor or leak over time.

Paint

If you've suffered a break in a window pane, you may be worried about the expense of a new one. However, replacing one glass pane does not need to cost a fortune when you do it yourself. In fact windows with double panes can be replaced at less than the cost of an expert.

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

When you are ready to begin with the removal of the window pane. Pry out the glazing points made of metal that are attached to it. These are basically small metal triangles that act as "nails" which hold the window in place within the frame of wood. They are buried beneath a glaze putty or bead which hardens into an unbreakable wedge that holds the wood frame securely in place and hides the points.

After you have the old pane taken away, replace Window pane clean up the surrounding frame and wood. Scrape away any paint and sand down the rabbet grooves where the glazing points were. They 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, apply a layer of flax oil. This will help to prolong the life of the frame.

The next step is to measure the dimensions of the window's opening. It is necessary to take vertical and horizontal measurements of the entire opening, and also the thickness of the old pane. To determine the exact dimensions of the new pane subtract 1/8 inch from both measurements. This will allow for seasonal changes in the glass. Take these dimensions to your local 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.