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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, and reap benefits like improved comfort, increased the value of resales and lower utility costs.

It's a project you can take on yourself for less than the cost of hiring 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 or insulate glass to improve energy efficiency, cut down on noise, and maintain the historical integrity of your old home. The process of replacing windows is simple and can be done by anyone with basic hand tools. You'll also require an extra window pane, glazier's tips, pliers, and latex glazing putty. If needed you may use a heating gun to warm the old putty. Wear safety goggles and gloves prior to beginning. Working with broken glass can cause serious injuries.

Remove any broken glass pieces remaining. This is best done using pliers, however, a flathead screwdriver may be effective in the pinch. Then, use a wooden chisel or putty knife remove the rest of the old putty around the frame and sash. Be careful and slow and be careful not to break the existing window sash. It is a good idea to work on a stable ladder instead of the ground and to have someone standing below the sash to help hold it in place.

Make sure the window frame is ready to accommodate the new pane once you have removed the old glue. Find the width and the height of the sash opening by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be sent to a home center or hardware store to get a piece cut of glass that is in stock to the correct size. You can cut the glass yourself if you possess the right tools.

After installing the glass After installing the glass, apply caulking to the edge. This will make the glass weatherproof. Install a glazier's pointing on both sides of the frame. This will ensure the pane. The points shouldn't be too tight that they cause friction between the sash and frame however they shouldn't be too loose.

Before putting the putty on, work it in a gentle manner until it is soft and free of lumps. Then, roll it into pencil-size strips. Apply the first strip to the frame's corner. Work from corner to corner, making sure it is even and smooth.

Glazier's Points

The glazier’s points are small triangular metal pieces which help to secure the glass for window replacement to the frame without damaging the delicate surface. Understanding how to use these hidden little helpers is easy and could save you money on professional installation or the cost of buying new glass.

Once the old putty and the glazier's point are gone Clean the frame thoroughly with a knife to eliminate any remaining traces. If needed, lightly sand the wood along grooves of the rabbet to smooth rough spots. If you do sand your wood, ensure you protect it with painter's tack to avoid accidental damage.

Take measurements of the empty frame and write down accurate measurements. Take these dimensions to a hardware store or home center and request that the new pane made 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 into the frame and push it in using your hands. Then, you can use the point of your chisel, or the back end of the putty knife to pierce the glazier's points as shown in Figure 11. The glazier's point should be flush against the top edge of your pane, and the shoulders should be just below the 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. Let it dry completely and cure.

When the glazing compound is dry, you're ready to install the new Window replacements near Me sash. First, you need to coat the wood with an even layer of linseed. This will stop the new putty from drying out or cracking when it absorbs moisture. Use a brush to apply this coat, or even the tip of the putty blade. Then use the chisel that is on the back of the tool or the back of the putty handle to gently smash the new sash or glazier's tip into the rabbet grooves. Repeat this process in intervals of 10 inches all around the frame.

Putty

A baseball that is thrown or a rock that is errant or a fallen branch can cause a window pane to break or crack. The majority of windows can be repaired easily by putting in a new piece. The glass is held in the position with a tiny metal clip, referred to as a glazier’s point and putty. This compound is also called glazing compound. Remove the old pane and clean the area using an abrasive, pull-type scraper or wood chisel. Wear protective glasses and gloves when working. You'll require a heat gun if the window is glued into the frame.

If you are planning to install the original sash, take off the molding that supports the old pane. Then, sand the sash to make sure it's flat and ready for new caulk. Once the sash is re-installed, apply a new silicone caulk to the glass to ensure it doesn't swell or fade over time.

Remove the glazing points from the rabbets. These are the grooves in the sash, where the glass for windows replacement is located. If they're hard to chisel out, try holding an instrument like a heat gun to soften them up first. When using a heat tool, make sure to avoid damaging the sash and its railings.

Once the old points of glazing and putty have been removed prepare a bed for the new pane. Roll a rope with glazing compound between your fingers and make it about 1/2 inch thick. Then, you can press it into the rabbets where the glass will be. It's important that the glass sits on the putty in all places on each side, so if you need 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 glass glue or silicone caulk prior pressing it into the sash. If the crack is not sealed, you will require putty to keep water out. After the putty has dried, wipe 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 create a strong seal and may be leaking or discoloring over time.

Paint

If you've experienced a broken window pane, then you may be worried about the cost of replacing it. The truth is, replacing a single pane of glass doesn't need to be costly when you do it on your own. In fact even windows with double panes can be replaced at only a fraction of the cost of an expert.

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

When you are ready to begin taking down the old window pane. Pry out the metal glazing points that are attached to it. These are tiny metal triangles that function as "nails" to hold the window in place. They are placed under a bead or glazing putty that hardens to a solid wedge that holds the frame in place and hides the sharp edges.

After you have the old pane taken away clean the surrounding frame and wood. Scrape off any old paint and sand the rabbet grooves where the glazing points were placed. Sand them down to clean wooden surfaces so you can paint the frames the same color. After sanding, apply a layer of flax oil to the wood's surface to prolong its life.

Next, measure the dimensions of the window's opening. It is necessary 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 you have the exact size for the new pane. This will allow for seasonal changes in the glass. Take these measurements to a hardware or home improvement store and have a piece 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.