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How to Replace Window Panes

A cracked window pane can be a source of frustration. It could also be an opportunity to upgrade your glass to energy efficient or insulated windows, and Installer enjoy benefits such as greater comfort, a higher potential for resales, and less costs.

You can do it yourself for a less than what it would cost to hire an expert. It requires the right equipment and an hour or two of your time.

Glass

If your single-pane windows are old damaged, cracked or deteriorating replacing them with modern glass that is tempered or insulated can improve energy efficiency and reduce noise while maintaining the original character of older homes. Most homeowners with basic hand tools can replace windows with ease. You will also need an additional window pane, glazier's tips pliers, and latex glazing putty. If needed, you can use a heating gun to warm the old putty. Before starting, wear protective gloves and goggles since working with broken glass can cause injuries.

Begin by removing any broken pieces of glass. It is recommended to use pliers for this however a flathead could be useful equally. Use a wood chisel, or putty knives to remove any remaining old putty around the frame and the window sash. Be careful not to damage the window sash. Take your time and work slowly. It is best to do this on a stable ladder rather than the ground and to have someone stand below the sash to help keep it steady.

Once you have removed all of the old putty, prepare the window frame to accommodate the new pane. To allow for seasonal expansion or contraction, subtract 1/8 inch each from the measurements of the width and height. Take these measurements to an 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 new pane After installing the new pane, apply a small amount of caulking along the edge to ensure it is weatherproof. Then install a glazier's point on each side of the frame to secure the pane in place. The points shouldn't be tight enough to create friction between the frame and sash however they should not be loose.

Before putting the putty on, knead it thoroughly until it is soft and free of lumps. Then make it into pencil-sized strips. The first strip should be glued to the corner of the frame. Work from corner to corner and ensure that it is even and smooth.

Glazier's Points

The glazier's points are tiny triangular pieces of steel which help to secure the glass to the frame without damaging the delicate surface. Understanding how to use these tiny helpers is simple and could save you money on a professional installation or the cost of buying new glass.

Once the old putty and the glazier's point are gone, thoroughly clean the frame with a knife to remove any remaining traces. Lightly sand the frame in the rabbet grooves, if necessary, to smooth rough areas. If you decide to sand wood, protect it with painter's tape to avoid accidental damage.

Note down the exact dimensions of the frame. Take these dimensions 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 perfectly and allows for expansion and contraction.

Place the new pane into the frame and push it in using your hands. Then use the point of your chisel or back of the putty knife to tap in 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 raised shoulders should be just below the lip.

Apply a thin layer glazing compound on the rabbet grooves as well as the edges of the glass. This will seal and protect the edges. Allow it to dry and cure fully.

After the glazing compound dries, you're ready to install the new window sash. First, coat the wood with an even layer of linseed. This will stop the new putty from taking in the moisture and deteriorating and cracking over time. Apply the coating using a brush this coat, or even the tip of the blade. Then use the chisel that is on the back of the putty tool or the back of the handle to gently hammer the new sash or glazier's point into rabbet grooves. Repeat this procedure every 10 inches along the perimeter of the frame.

Putty

A hurled baseball or an unintentional rock, or Replacement Windows Prices a fallen branch can cause a window to break or crack. Luckily, most windows can be repaired by simply placing a new piece in the right 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 installing a new pane, first take out the old one and clean the area using a rag and an abrasive scraper that is a pull type or an abrasive wood chisel. Wear protective glasses and gloves while working. You'll require a heat gun if the window is glued into the frame.

If you are planning to replace the original sash in the future, take care to remove the molding pieces that secure the old pane. Then, sand the sash to ensure it's level and ready for new caulk. After the sash has been installed, you can apply a silicone caulk over the glass. This will ensure that it won't be leaking or fade over time.

Remove the glazing points from the rabbets and the grooves in the sash that the glass sits. If they are hard to cut, place an instrument like a heat gun over them for a few minutes to soften them. If you're using a heated gun, be careful not to cause damage to the sash or its railings by holding the tool too close.

After the old glaze points and putty are removed, make a bed for the new pane. Roll a rope with glazing compound between your fingers, and make it around 1/2 inch thick. Place it into the rabbets, where the glass will be placed. The glass must be positioned against the putty on both sides. If necessary you want to tap your glass lightly into the rabbet with your thumb.

If the new pane has a crack you can fill it with a solvent-based glass glue or silicone caulk prior to pressing it into the sash. If the crack isn't sealed, you'll require putty to keep the water out. When the putty dries and the film is oily, wipe it off the glass with an abrasive and allow it to dry completely prior to painting. Paint before the putty has dried completely. It won't make a strong seal and could be leaking or discoloring over time.

Paint

You may be concerned about replacing a broken pane of glass. The truth is, replacing a single piece of glass doesn't need to be costly when you do it on your own. In fact windows replacement with double panes can be replaced for a fraction of the cost of an expert.

First, [empty] if you're working on a large window, make sure that it is securely fastened to the frame. This can be done relatively easy and fast using the proper tools and techniques.

When you are ready to begin taking down the old window pane. Remove the metal glazing points attached to it. These are tiny metal triangles that function as "nails" that hold the window in place. They are submerged beneath a bead or glazing glue that hardens to solid wedge that holds the wood frame securely in place and conceals the edges.

After removal of the old pane clean the frame and the wood. Scrape off any old paint and sand the rabbet grooves that the glazing points were placed. They should be sanded to bare wood so that you can paint them the same color as the rest the frame. After sanding the wood you can apply a layer flax oil. This will help to prolong the life of the frame.

The next step is to determine the size of the window 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 you have the exact size for the new pane. This will also allow for expansion and contraction of the glass in times of seasonal change. Take these measurements to the hardware or home improvement store and ask them to cut you 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.