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How to Replace Window Panes

A damaged window pane could cause a lot of trouble. It could be a chance to upgrade your windows to energy efficient or insulated ones, and reap advantages like improved comfort, increased resale value and lower utility costs.

This is a project you could do yourself for only 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 insulated glass to increase energy efficiency, reduce noise, and protect the historic integrity of your old home. The procedure of replacing the window pane is easy and can be accomplished by homeowners with basic hand tools. In addition to a new pane, the following items are needed for the replacement glass windows process: latex glazing putty Glazier's points; pliers and a heat gun for warming the old putty, if needed. Before starting, put on gloves and safety glasses as working with broken glass could cause injuries.

Begin by removing any broken pieces of glass. It is recommended to use pliers for this, but a flathead can be useful equally. After that, use a wood chisel, or putty knife, to take the remainder of the old putty around the frame and the sash. Be careful not to damage the window sash. Take your time and work slowly. It is recommended to work on a sturdy ladder rather than the ground and to place someone on the sash to help hold it steady.

After you've removed all the old putty, prepare the window frame for the new pane. Find the width and the height of the opening for the sash by subtracting 1/8 inch from each measurement (to allow for seasonal expansion and contraction). These measurements can be taken to an hardware or home centers store to have a piece cut of glass that is in stock to the correct size. Alternatively, you can cut the glass yourself, if you have the tools you need.

After installing the glass, apply caulking to the edge. This will make the glass replacement for window weatherproof. Then, you can install a glazier's pointing on each side of the frame to secure the pane into its place. The points should not be too tight that they cause friction between the frame and replacement sash windows cost however they should not be loose.

Before putting the putty on, make sure to knead it until it's soft and free of lumps. Roll it into pencil-sized strips. Place the first strip to the corner of the frame, working from one corner to the other to ensure it is even and smooth.

Glazier's Points

The glazier's facets are small triangular pieces of metal that help secure glass into frames for windows without damaging or scratching 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 purchasing new glass.

After removing the old putty, glazier points as well as any remaining leftovers clean the frame thoroughly with an utility knife. If necessary you can lightly sand the wood along the grooves of the rabbets to smooth out rough spots. If you do sand your wood, be sure to protect it with painter's tack to avoid accidental damage.

Take measurements of the empty frame and record precise measurements. Take these dimensions to a hardware store or home center and have the new pane made slightly smaller than the frame's opening. This will ensure a secure fit and will allow room for expansion and contraction.

Place the new pane in the frame and press it down with your hands. Utilize the chisel's point or the edge of the putty blade to tap in the glazier's points as illustrated in Figure 11. The glazier's points should sit aligned with the top edge of the pane and the raised shoulders should be just below the lip.

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

Install the new window sash window replacement when the glazing compound has dried. The first step is to coat the wood with a heavy coat of Linseed oil. This will prevent the new putty from taking up the moisture and drying out and cracking with time. Apply the coat using a brush or the tip of your knife, then use the chisel or the back end of the knife to gently hammer the new sash and glazier's point into the grooves of the rabbet. Repeat this process in intervals of 10 inches all around the frame.

Putty

A baseball thrown at you or an unintentional rock, or falling branch could cause a window to break or crack. The majority of windows can be replaced by installing a new piece. The glass is held in place by small clips made of metal called a glazier's point, and putty, often called glazing compound. Remove the old pane and clean the area with the rag, a pull-type scraper, or a wood chisel. Wear protective glasses and gloves when working. You'll need a heat gun in the event that the window is glued to the frame.

If you're planning to install the original sash in the future, take care to remove any molding pieces that hold the old pane in place. Sand the sash until it's flat and ready for new caulk. After the sash has been re-installed and sanded, apply a fresh silicone caulk around the glass to ensure that it will not leak or change color over time.

Take out the glazing points in the rabbets. These are the grooves on the sash, which is where the glass is. If they're difficult to chisel, use a hand tool such as a heatgun over them for a few minutes to soften them. When using a heated tool, be careful to not scratch the sash or its railings.

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

If the new pane has a crack then you can seal it with a solvent-based glue or silicone caulk prior to pressing it into the sash. If not, you'll have to apply putty over the crack to create a tight seal and keep water out. When the putty dries and the film is oily, wipe it off the glass with a rag and allow it to dry completely prior to painting. If you paint before the putty has completely dry, it won't form a solid seal and could leak or discolor in time.

Paint

If you've had a Broken window replacement window handle replacement pane, you might be worried about the cost of a new one. It's true that replacing a single piece of glass doesn't have to be expensive when you do it on your own. In fact even windows with double panes can be replaced for only a fraction of the cost of a professional.

First, if you're working on a large-sized window, ensure that it is securely fixed to the frame. This task can be made relatively simple and fast using the appropriate tools and techniques.

Once you're ready to begin, begin by removing the old window pane by removing the metal glazing points that are attached to it. These are essentially small metal triangles that act as "nails" that hold the window in in the wood frame. They are placed under a bead of glazing putty that hardens into a solid, moulded wedge that secures the window in place and hides the points.

After you have removed the old pane taken away Clean up the frame and wood. Scrape away any paint and sand down the rabbet grooves where the glazing points were. Sand them to bare wood surfaces, so that you can paint the frames the same color. After sanding the wood then apply a layer of flax oil. This will help to prolong the life of the frame.

The next step is to determine the width of the window opening. You'll need to take horizontal and vertical measurements of the entire opening and also the thickness of the old pane. Subtract 1/8 inch from each measurement to ensure that you get the exact measurement for the new pane. This will also allow for expansion and contraction of the glass in times of seasonal changes. Bring these measurements to the hardware or home improvement store, and they will 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.