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How to Replace Window Panes

A cracked window pane is a nuisance. This can be an opportunity to upgrade to energy-efficient windows or insulated ones to enjoy benefits such as improved comfort, increased resale value and reduced utility costs.

You can do it yourself for a a fraction of what it would cost to employ an expert. You'll only require the proper tools and a few hours of your time.

Glass

replace Window Pane your old single-paned windows with tempered insulate glass to improve the efficiency of your energy, reduce noise, and maintain the historic integrity of your older home. A majority of homeowners with hand tools can replace windows with ease. You will also require a replacement window replacements 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, put on protective gloves and goggles since working with broken glass could cause injuries.

Remove any broken glass pieces that remain. It is best to use pliers, but a flathead can be used equally. Utilize a wood chisel or putty knives to remove any old putty remaining around the frame and window sash. Work slowly and carefully, taking care not to break the current window sash. This can be done best on a ladder, not the ground. Also, you should have someone lower to keep it in place.

Once you've removed all the old putty, it is time to prepare the window frame to accommodate the new pane. Measure the width and 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 a hardware store or home center and find a piece glass cut to size. Alternately, you can cut the glass yourself if you have the right tools.

After installing the glass Apply caulking around the edge. This will make the glass weatherproof. Then install a glazier's point on the frame's opposite side to secure the pane into its place. The points shouldn't be so tight that they cause friction between the frame and sash however they should not be loose.

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

Glazier's Points

The glazier's points are small triangular pieces of steel which help to secure the glass to the frame without causing damage to the delicate surface. Learning how to use these hidden little helpers is easy and can save you money on professional installation or the cost of purchasing new glass.

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

Write down the exact dimensions of the frame. These measurements can be brought to an hardware or home centers store and the new pane will be cut slightly smaller. This will ensure a snug fit and leave room for expansion and contraction.

Place the new window replacement in the frame and press it into the frame using your hand. Utilize the chisel's point, or the back of the putty blade to tap the glazier's points as shown in Figure 11. The glazier's points should sit flush against the top edge of the pane and the raised shoulders should be just beneath that lip.

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

When the glazing compound is dry, 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 stop the new putty from taking up the moisture and deteriorating and cracking with time. Use a brush to apply this coat, or the point of the blade. Then, use the chisel on the back of the putty tool or the back of the putty handle to gently smash the new sash or glazier's point into the grooves of the rabbet. Repeat this procedure every 10 inches along the frame's perimeter.

Putty

A baseball thrown at you, an errant rock or a fallen branch can cause a window to break or crack. Luckily, most windows can be replaced by simply placing a new piece of glass in its the proper place. The glass is held in place by tiny metal clips known as a glazier's point and putty, which is often called glazing compound. Before you install a new pane, first get rid of the old one and clean the area using a rag and an abrasive scraper that is a pull type or the wood chisel. Wear safety glasses and gloves while you do this work. If the window is attached to the frame, you'll need make use of a heat gun to soften the adhesive prior to taking it off.

If you're planning to install your original sash, remove the molding that holds the old pane. Then you can sand the sash down to ensure it's level and replace window Pane ready to be re-caulked. Once the sash is re-installed and sanded, apply a fresh silicone caulk to the glass to ensure it will not leak or change color as time passes.

Take the glazing points out of the rabbets, or the grooves in the sash, where the glass sits. If they're hard to chisel, hold an instrument like a heat gun over them for a few minutes to soften them. When using a heating tool, be careful to avoid damaging the sash or its railings.

Prepare 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 around 1/2 inch thick. Press it into the rabbets, where the glass will be placed. The glass should rest against the putty on both sides. If needed, lightly tap your glass into the rabbet with your thumb.

If the new pane is cracked you can fill it with a solvent-based glue or silicone caulk before pressing it into the sash. If the crack isn't sealed, you will require putty to keep water from getting in. After the putty has dried then clean the oily film off the glass with an abrasive and allow it to dry completely prior to painting. If you paint before the putty has completely dry, it will not form a strong seal and may be leaking or discoloring in time.

Paint

If you've suffered a break in a window pane, you might be concerned about the expense of replacing it. However, replacing a single glass pane doesn't have to break the bank if you do it yourself. Even double-paned windows can be replaced for a fraction of the price it costs a professional.

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

If you're ready to begin taking off the old window pane by prying out the glazing points made of metal that are connected to it. They are basically tiny metal triangles that act as "nails" that hold the window in 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 firmly in position and hides the points.

After you have the old pane removed clean the surrounding frame and wood. Scrape off any paint that has been used and sand down the rabbet grooves that the glazing points were placed. Sand them to bare wooden surfaces so you can paint the frames the same shade. After sanding the wood, apply a layer of flax oil. This will help prolong the life of the frame.

The next step is to measure the dimensions of the window opening. You will need to measure the horizontal and vertical dimensions of the entire opening, as well as the thickness. 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 the hardware or home improvement store and have 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.