How to Replace Window Pane Window Panes

A damaged window pane could be a source of frustration. It could also be a chance to upgrade your glass to energy-efficient or insulated windows, and benefit from improved comfort, increased resale value and reduced utility costs.

It's a task you can take on yourself for only a fraction of the cost of hiring a professional. You'll need only the proper tools and a few minutes of your time.

Glass

If your single-pane windows are old, deteriorating or broken replacing them with modern glass that is tempered or insulated will increase energy efficiency and reduce noise while preserving the historic integrity of older homes. The replacement of windows is simple and can be done by homeowners with basic hand tools. You'll also require a replacement window pane, glazier's tips, pliers, and latex glazing putty. If needed you may use a heating gun to warm the old putty. Before starting, wear gloves and safety glasses as working with broken glass may cause injuries.

Begin by removing any remaining broken pieces of glass. This is best accomplished with a pair of pliers, however, flathead screwdrivers can be effective in the pinch. Utilize a wood chisel or putty knives, to take away any old putty remaining around the frame and window sash. Be careful to not break the window sash. Be careful and slow. It is a good idea to work on a stable ladder rather than on the ground and place someone on the sash in order to help hold it steady.

After you have removed all of the old putty, prepare the window frame for the new pane. To allow for seasonal expansion or contraction by subtracting 1/8 inch from the measurements of the width and height. Bring these measurements to a hardware store or home center, and have a piece of stock glass cut to size. You can cut the glass yourself if you possess the appropriate tools.

After putting in the new glass, apply caulking on the edges. This will make the glass weatherproof. Then, place a glazier's tip on the frame's opposite side to secure the pane into place. The points should not be so tight that they create friction between the frame and sash but they should not be too loose.

Before applying the putty knead it thoroughly until it is soft and free of lumps. Then you can roll it into pencil-sized strips. The first strip should be glued to the corner of the frame. Work from one corner to another to ensure it's even and smooth.

Glazier's Points

The glazier’s points are small triangular pieces of steel that help secure the glass into the window frame without causing damage to the delicate surface. Learning how to use these tiny pieces of help is simple and can save you money on professional installation or the cost of new glass.

After the old putty and the glazier's point are gone Clean the frame thoroughly with a knife to get rid of any remaining traces. If needed it is necessary to lightly sand the wood along grooves of the rabbets to smooth out rough areas. If you do sand your wood, ensure you protect it with painter's tape to avoid accidental damage.

Take measurements of the empty frame and note down precise measurements. Take these dimensions to a hardware store or a home center and have 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 window in the frame and push it into place firmly using your hand. Make use of the chisel's point, or the edge of the putty blade to tap in the glazier's points as illustrated in Figure 11. When you're done, they should be in line with the top edge of the pane. the shoulders that are raised of the points should be just below the rabbet's lip. groove.

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

Install the new window sash when the glazing compound has dried. The first step is to coat the wood with an even layer of linseed. This will stop the new putty from drying out and cracking due to the moisture it absorbs. Apply this coat using a brush or the tip of your putty knife, and then employ the chisel or back end of the putty knife to gently press the new sash and glazier's point into the rabbet grooves. Repeat this process in intervals of 10 inches all around the frame.

Putty

A hurled baseball or an unintentional rock, or a fallen branch can cause a window pane to break or crack. The majority of windows can be repaired easily by installing a new piece. The glass is held in position by a small metal clip, referred to as the glazier's point, and putty. This compound is also referred to as glazing compound. Before installing a replacement double glazed windows pane, first get rid of the old one and clean up the area using the help of a rag, the pull-type paint scraper or an abrasive wood chisel. Wear gloves and safety glasses while working. If the window is attached to the frame, you'll need to employ a heat gun in order to soften the adhesive prior to taking it off.

If you're planning to install the original sash, take off the mold that holds the old pane. Then, sand the sash to make sure it's flat and ready to be re-caulked. After the sash has been re-installed and sanded, apply a fresh silicone caulk around the glass to ensure it will not leak or change color over time.

Take out the glazing points in the rabbets. These are the grooves on the sash, where the glass is. If they're hard to cut, place a hand tool like a heat gun over them to soften first. If you're using a heating gun, be careful not to scratch the sash or its railings by using the tool too closely.

After the old points of glazing and putty have been removed, make a bed for the new pane. Roll a rope made of glazing compound between your fingers, and then make it about 1/2 inch thick. Then, press it into the rabbets, where the glass will sit. The glass should rest against the putty on both sides. If necessary you want to tap your glass lightly into the rabbet using your thumb.

If the new pane is damaged, you can use the silicone caulk or glass glue that is based on solvents to seal the crack prior to pressing it in the sash. In other cases, you'll need to putty over the crack to form a tight seal and keep water out. After the putty is dry then clean the oily film off the glass with an abrasive and allow it to dry completely before painting. If you paint before the putty has completely dry, it won't create an effective seal and could be leaking or discoloring in time.

Paint

If you've experienced a broken window pane, you might be worried about the expense of a new one. The truth is, replacing a single pane glass doesn't need to be costly if 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.

If you are working on a large-sized window, make sure it is securely fixed to the frame. This job can be done relatively easy and fast with the appropriate tools and techniques.

When you're ready to start taking off the old window by removing the glazing points of metal that are attached to it. These are tiny triangles of metal that act as "nails", holding the window within the frame. They are placed beneath a layer of glazing putty that hardens into a solid, formed wedge that holds the window seal replacement firmly in place and conceals the edges.

After you have removed the old pane taken away, clean up the surrounding frame and wood. Scrape off any old paint, and sand the rabbet grooves in which the glazing points were. They should be sanded to the point of being bare, so that you can paint them the same color as the rest of the frame. After the sanding process, apply a coat of flax oil on the bare wood to help extend its lifespan.

The next step is to measure the dimensions of the window's opening. It is necessary to take vertical and replace Window pane horizontal measurements of the entire opening as well as the thickness of the old pane. To get the exact size of the new pane subtract 1/8 inch from both measurements. This will also allow for expansion and contraction of the glass during seasons of changes. You can bring these measurements to a hardware or home improvement shop 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.