How to Replace window Pane Window Panes

A damaged or cracked window can be a nuisance. It could be a chance to upgrade to energy-efficient windows or insulated ones, and reap benefits like increased comfort, increased resale values and reduced utility costs.

It's a task you can tackle yourself at a fraction of the cost of hiring a professional. It requires the right tools and an hour or two of your time.

Glass

Replace your old single-paned windows using tempered or insulation glass to improve energy efficiency, cut down on noise, and maintain the original character of your older home. The majority of homeowners with basic hand tools can repair the window pane. You'll also require a replacement double glazed windows window pane, glazier's suggestions, pliers, and latex glaze putty. If needed you may use a heatgun to warm the old putty. Before starting, put on gloves and safety glasses as working with broken glass could cause injuries.

Begin by removing any broken pieces of glass. This is best accomplished with a pair of pliers, however, a flathead screwdriver may be effective in the pinch. Then, use a wooden chisel, or putty knife, to take the remainder of the old putty around the frame and the sash. Be careful not to scratch the window sash. Work slowly and carefully. This is best done on a ladder, not on the ground. Also, you should have someone on the ground to hold it steady.

After you've removed all the old putty, prepare the window frame to fit the new pane. Measure the width and height of the sash opening by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Bring these measurements to the nearest hardware store or home center and find a piece glass cut to size. You can cut the glass yourself if you possess the appropriate tools.

After putting in the new pane After installing the new pane, apply a small amount of caulking around the edge to ensure it is weatherproof. Install a glazier's point on both sides of the frame. This will secure the pane. The points shouldn't be too tight that they create friction between the sash and frame but they shouldn't be too loose.

Before applying the putty to the surface, gently knead it until it becomes soft and free from lumps. Make it into pencil-sized strips. 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 the small triangular pieces which help to secure glass into the frame of a window without scratching or damaging the fragile surface. Understanding how to use these hidden tiny helpers is simple and can save you money on a professional installation or the cost of new glass.

After the old putty as well as the glazier's points have been removed Clean the frame thoroughly using a utility knife to remove any remaining residue. Lightly sand the wood into the rabbet grooves, if necessary, to smooth rough areas. If you do sand the wood, make sure to protect it with painter's tack to avoid accidental damage.

Write down the dimensions of the frame. These measurements can be taken to the hardware or home center store, and the new pane will be cut a bit smaller. This will ensure a secure fit, and allow for expansion and contraction.

Place the new pane in the frame and press it down using your hands. Make use of the chisel's point or the back of the putty blade to tap the glazier's points as illustrated in Figure 11. The glazier's point should be flush against the top edge of the pane and the shoulders raised should be just below the lip.

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

Install the new window sash when the glazing compound has dried. The first step is to coat the wood with a thick coat of Linseed oil. This will stop the new putty from soaking up moisture and deteriorating and cracking over time. Use a brush to apply this coat, or 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 the grooves of the rabbet. Repeat this procedure every 10 inches along the perimeter of the frame.

Putty

A baseball hit or a rock thrown in error or a branch falling could result in a broken or cracked window. Fortunately, windows can be repaired by simply placing a new piece of glass in its place. The glass is held into place by a small metal clip, called a glazier’s point and putty. This compound is also referred to as glazing compound. Remove the old pane and clean the area with the rag, a pull-type scraper or wood chisel. Wear safety glasses and gloves while doing this work. If the window is attached to the frame, you'll have to make use of a heat gun to soften the adhesive prior to cutting it loose.

If you're planning to install the original sash, remove the molding pieces that secure the old pane. Sand the sash until it's flat and ready to receive new caulk. After the sash has been re-installed and sanded, apply a fresh caulk made of silicone around the glass to ensure that it won't leak or discolor as time passes.

Take out the glazing points in the rabbets. These are the grooves on the sash, where the glass is located. If they're difficult to chisel, replace window pane hold the hand tool, like a heat gun over them to allow them to soften before. If you're using a heating gun, be cautious not to damage the sash or its railings by placing the tool too closely.

After the old points of glazing and putty have been removed prepare a bed for the new pane. Roll a rope of glazing compound between your fingers, and make it about 1/2 inch thick. Place it into the rabbets where the glass will be put. The glass must be positioned against the putty on both sides. If necessary gently tap your glass into the rabbet with your thumb.

If the new pane is cracked then you can seal it with a solvent-based glass glue or silicone caulk before pressing it into the sash. In other cases, you'll need to apply putty on the crack to form an airtight seal and keep water out. When the putty dries then clean the oily film off the glass using a rag and allow it to dry completely before painting. Paint after the putty has completely dried. It won't form a good seal and could leak or discolor with time.

Paint

If you've had a broken window pane, you might be worried about the expense of replacing it. In reality, replacing a single piece of glass doesn't have to be expensive even if you do it your own. In fact even windows with double glazing replacement windows panes can be replaced at a fraction of the cost of an expert.

If you're working with large glass windows first ensure it is securely fixed to the frame. Using the proper tools and techniques, you can make this task relatively easy and fast.

If you're ready to begin taking off the old window pane by removing the glazing points made of metal that are attached to it. These are tiny metal triangles which act as "nails" that hold the window within the frame. They are submerged beneath a glaze putty or bead that sets to form solid wedge which holds the wood frame securely in place and conceals the edges.

Once you have the old pane removed Clean up the frame and wood. Scrape away any paint and sand down the rabbet grooves where the glazing points were. Sand them down to bare wooden surfaces, allowing you to paint the frames the same color. After the sanding process, apply a coat of flax oil to the bare wood to extend the life of the frame.

The next step is to determine the width 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. You can take these measurements to a hardware store or home improvement store and have 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.