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How to Replace Glass Windows

When a window pane breaks the gaps that result let moisture into the home. These holes also lower the efficiency of energy and resale value.

A replacement is a simple and affordable solution. You'll need latex glazing putty, metal glazing points; pliers and the heat gun. Be sure to wear gloves and safety glasses.

Measure the Window

Making the right measurements can be the difference between success and failure in the success of a window replacement. If you order the wrong size replacement window, it could be costly to install. It might also not fit correctly in the opening. Follow these steps to measure your old window before you remove it.

Begin by measuring the frame's length in three places including the top, middle and the bottom. Use a tape measure and note each measurement. Be aware that the width of the window does not include any trim. Next, measure the height of the frame from three angles on the left side, the center and the right side. Choose the shortest measurement and take note of it. Then subtract 1/4 inch off each of these measurements to arrive at the height and width measurement.

When measuring the height, be sure to include any jamb trimming. Measure the distance between the interior of the jambs on the left and on the right side of the head jamb. If the replace window panel is finished in drywall, measure up to the top.

Once you have the measurements, take out the nails and putty that are holding the old pane. If the molding on the one side of the frame is soiled it is possible to use an old chisel or Replace Glass Windows a scraper for paint that has a pull-type. If there are just tiny pieces of molding, simply cut them loose using a utility knife. Now you are able to measure your new window frame.

Take off the old Pane

A sloppy baseball, an out-flying branch or a careless cleaning session can cause cracks in even the strongest of window panes. In most cases, the glass is held in place with glazier's putty and small metal clips called glazier's point. The first step to replace window glass damaged panes is to take off the old glazing putty and points. The replacement will then bed into place and it can be glazed.

To avoid damaging the new pane, wear protective gloves and work on a flat surface. Utilizing a utility knife, carefully cut off the putty as well as the point of the rabbet. If the old putty is hard to remove, soften it with a hair dryer before cutting it with your knife. Heat guns can be used to remove difficult-to-remove putty. However you should only make use of them in short bursts.

Once the old putty is removed, mark each point or nail fastener and mark the place of the nail fastener's position in the frame. Using a pair of pliers, you can remove the old brads or nails. If the frame has been painted it will need to be removed with the help of a knife before you remove the point.

If you are looking to purchase a new glass, take measurements of the inside dimensions of the frame's opening. Subtract 1/8 inch from all sides to ensure that the replacement glass fits. You can usually find the right size at numerous hardware stores and home improvement stores. You could also have the glass cut to the exact size by a majority of glass replace window and glazing companies. If you decide to do this, be sure that the glass is at least a quarter inch smaller than the frame's opening.

Set the New Pane

When replacing a window, it is best to use energy efficient glass. This will save you money on your heating and cooling costs as well as help you conserve the environment. You can also opt for a more decorative or historic glass style to add to the style of your home.

Before you begin, clean the new glass to ensure there are no streaks or smudges. Scrape off the old glaze putty with a utility knife, and then brush off any remaining residue. It is best to work in a space that is well ventilated and have mineral spirits, or another solvent, to clean any mess.

To install the new window pane, begin by applying a thin layer of compound on the backstop. Place the pane into the rabbets, then press it down to secure it. Work until the window is at the center of the opening and just 1/8 of an inch remains between the glass face and the rabbet.

As you are at it you can sand and scrape the rabbets around them to bare wood. Then, cover them with exterior primer. This will help prevent moisture from seeping into the new pane. After the primer has dried, knead it until warm and malleable. Then, push it into the rabbets. It's OK to be a bit rough, as the aim is to create a solid seal that will last.

Apply the Putty

In the days prior to upvc or double glazing windows, the majority of windows were constructed from steel (usually zinc-coated) or Replace Glass Windows wood, and one glass pane was dropped into them. The glass was held in place by tiny nails, also known as spriggs which were put into frames. If you look closely at the nails, they should be easy to remove them. If they aren't moving, you may have spray them with silicone sealant remover and/or dissolver since this will break down the glue that holds them in place and allow you to pull them free.

You can also use a heat gun to loosen old glazing putty, making it easier to chip with the chisel. This is a safer option however you need to be careful not to focus the heat on one area of the wood surface and cause it to crack. Always wear gloves made of leather and eye protection when using a heating gun. Also, make sure the window is clamped down to stop it from moving when you are chopping out the old putty.

It is crucial to clean the frame with an oiled rag that has been dipped in mineral turpentine before applying any new putty. This will wash away any dried putty and give the frame more grip. Then apply a small amount of white putty to the inside edge of the groove in which the glass will be placed. It is crucial to get this right or the window won't sit in the groove properly. After putting the putty into shape and smoothing it out with a rag dipped in turpentine the glazing points can be replaced if needed.

Apply the oil

You'll have to remove the sash (the sliding part of the windows that holds the glass) or the jamb liners that are the sides of the frame. Take off the top of the sash, pressing it against the vinyl jambs that line the frame's sides. Then, give it a twist to release the springs at the bottom. Slider windows are usually the most straightforward to remove from the frame because you just lift the bottom portion of the sash.

After the old glass has been removed, use a wirebrush and a utility knife to scrub the frame. This will get rid of any dirt or paint that might have gotten stuck in the grooves of the beadwork. You can also soften the glazing putty with the use of a heat gun. Be careful not to burn wood. If you need to, sand the grooves to bare wooden.

After the sash has been removed, you can order a new window glass from a full-service hardware shop. Make sure to take the measurements accurately and subtract 1/8 of an inch for shrinkage. Buy a package with glazing points to hold your glass until the putty is hardened.

Apply a thick layer of linseed onto the wood frame before re-glazing the window. Let it soak into. This will lubricate your wood and help your new paint last longer. You can then continue with the remainder. The same oils from linseed can be used to lubricate the tracks and hinges of sliding doors. This will ensure that windows and doors are functioning smoothly and will prevent them from squeezing or sticking.