How to replace Window pane Window Panes

A damaged or cracked window can be a source of frustration. It could also be an opportunity to upgrade your glass to energy-efficient or insulated windows to benefit from more comfort, higher the value of resales and lower utility bills.

You can do it yourself for only a fraction of the cost it would cost to hire an expert. It requires the right tools and only an hour or two of your time.

Glass

If your single-pane windows are outdated damaged, cracked or deteriorating, replacing them with newer glass that is tempered or insulated will increase energy efficiency and decrease noise while maintaining the historical integrity of older homes. The procedure of replacing the window pane is simple and can be done by most homeowners who possess basic hand tools. In addition to a replacement pane, the following components are needed such as latex glazing putty; pliers, glazier's points and an electric heater to warm the old putty if required. Before starting, wear gloves and safety glasses as working with broken glass may cause injuries.

Take out any broken glass pieces that remain. It is best to use pliers, but a flathead can be useful as well. Use a wood chisel, or putty knives to remove any old putty that remains around the frame and the window sash. Be careful to not damage the window sash. Take your time and work slowly. It is a good idea to work on a sturdy ladder rather than on the ground and place someone on the sash to help hold it in place.

Make sure that the window frame is ready to receive the new pane after you have removed the old glue. To allow for seasonal expansion or contraction by subtracting 1/8 inch from the measurements of width and height. Bring these measurements to a hardware store or home center, and find a piece glass cut to size. Alternatively, you can cut the glass yourself, if you have the tools you need.

After putting the new pane in place After installing the new pane, apply a small amount of caulking around the edges to ensure it is weatherproof. Then, place a glazier's tip on the frame's opposite side to secure the pane in place. The points should not 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 is smooth and free from lumps. Roll it into pencil-sized strips. The first strip should be glued to the frame's corner. Work from corner to corner to ensure it's even and smooth.

Glazier's Points

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

After removing the old putty, glazier points, and any other leftovers clean the frame thoroughly with an utility knife. If necessary it is necessary to lightly sand the wood along the rabbet grooves to smooth out rough areas. If you decide to sand wood, cover it with painter's tape to prevent accidental damage.

Measure the empty frame's dimensions and write down accurate measurements. These measurements can be brought to a home center or hardware store, and the new frame will be cut slightly smaller. This will ensure that the pane fits perfectly and allows for expansion and contraction.

Insert the new pane into the frame and push firmly using your hands. Utilize the point of the chisel or the edge of the putty blade to tap in the glaziers' points as illustrated in Figure 11. The glazier's points should sit flush against the top edge of your pane and the raised shoulders should be just beneath that lip.

Apply a thin layer of glazing compound on the edges of the new glass and into the rabbet grooves, to seal and protect them. Let it dry completely and cure.

When the glazing compound is dry it's time to put in the new window sash. The first step is to coat the wood with a thick coat of linseed oil. This will prevent the new putty from drying out or cracking due to the moisture it absorbs. Use a brush to apply this coat, or the point of the putty blade. Then use the chisel that is on the back of the putty tool or the back of the handle to gently smash the new sash or glazier's point into grooves of the rabbet. Repeat this process at intervals of 10 inches around the frame.

Putty

A baseball hit or a rock thrown by error or a branch falling can cause a broken or cracked window pane. Most windows can be repaired easily by installing a new piece. The glass is held in the position with a tiny metal clip, called the glazier's point, and putty. This compound is also known as glazing compound. Before installing a replacement pane, first take out the old one and clean the area using a rag and a pull-type paint scraper or an abrasive wood chisel. Wear safety glasses and gloves while you do this work. You'll need a heat gun if the window is glued into the frame.

If you're planning to install the original sash, gently remove any molding pieces that secure the old pane. Sand the sash until it is flat and ready to receive new caulk. Once the sash is re-installed then, apply a new silicone caulk around the glass to ensure it doesn't swell or fade in time.

Remove the glazing points from the rabbets, or the grooves in the sash where the glass is. If they're difficult to work out, try holding a hand Double Glazing Replacement Window tool like a heat gun to soften them first. When using a heated tool, be sure to not damage the sash and its railings.

Create a bed for your new pane after you have removed the old glaze points and putty. Roll a rope of glazing compound between your hands, shaping it to be about 1/2-inch thick. Then, press it into the rabbets in which the glass will rest. The glass must rest against the putty on both sides. If you need to gently tap your glass 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 before pressing it into the sash. If the crack is not sealed, you'll need to apply putty to keep the water out. After the putty is dry then clean the oily film off the glass with a rag and allow it to dry completely prior to painting. If you paint before the putty is completely dry, it won't create a solid seal and could be leaking or discoloring in time.

Paint

If you've had a broken window pane, you may be worried about the expense of replacing it. In reality, replacing a single piece of glass doesn't have to be expensive when you do it on your own. Even a double-paned window can be replaced for a fraction of what it will cost an expert.

If you are working with large glass windows first ensure it is securely fixed to the frame. This is relatively easy and fast using the appropriate tools and techniques.

If you're ready to begin taking off the old window by removing the glazing points of metal that are connected to it. These are tiny metal triangles which act as "nails", holding the window in place. They are submerged beneath a layer of glazing putty, which is then cured to form a solid, molded wedge which holds the window in place and replace window pane conceals the edges.

After you have removed the old pane removed, clean up 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 bare wood surfaces, so that you can paint the frames the same color. After sanding, apply a coat of flax oil to the wood that is not sanded down to extend the life of the frame.

The next step is to measure the dimensions of the window's opening. It is necessary to measure the horizontal and vertical dimensions of the entire opening, as well as the thickness. Subtract 1/8 inch from each measurement to ensure you get the exact measurement for the new pane. This will also allow for expansion and contraction of the glass during seasonal change. 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.