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How to Replace Glass Windows

If a window pane is cracked the gaps that result let moisture into the home. These holes also decrease the efficiency of energy and resale value.

A replacement is a cost-effective and simple solution. You'll need metal glazing points and pliers, as well as latex glazing putty and a heatgun. Wear safety glasses and gloves.

Measure the Window

Making the right measurements can make or break the success of a window replacement. If you order the wrong size replacement window panes window, it can be costly to install. It might not be able to fit properly into the opening. To avoid this take these steps to determine the size of the old window before taking it down.

Start by measuring the width of the window frame in three places three places: the top, middle and the bottom. Use a tape measure and record each measurement. Keep in mind that the width of the window does not include any trim. The frame height is measured in three areas on the left and the right side. Choose the shortest measurement and take note of it. Subtract 1/4 inch from both of these measurements for a rough estimation of the width and height.

Be sure to include any jamb trim when measuring the height. Then measure the distance from the inside of the left and right side jambs to the head jamb, or if the windows are completed with drywall instead of jambs, take measurements to the top of the drywall.

Once you have the measurements, take out the nails and putty which are holding the old pane. If the molding on the other side of the frame has nail holes or holes in the paint, a pull-type scraper or an old chisel will do the trick. If you only have tiny pieces of molding, simply pry them loose with an utility knife. Now you are able to measure your new window frame.

Remove the old Pane

An errant baseball, an out-flying branch or a rash cleaning routine can break even the toughest of window panes. In most cases, glaziers' putty and metal clips called glaziers points keep the glass in the right position. To replace window panels a broken glass pane, the first step is to remove any old points and glaze putty. The replacement of window glass is then able to laid in place and then glazed.

Wear gloves that are protected to prevent damaging the glass. Work on an even surface. Use a utility blade to remove the putty from the rabbet. If the old putty has difficulty removing then use a hair dryer to soften it before you use your knife. You can also use a heating gun for difficult to remove glazing putty however, be sure to apply the heating in short bursts and don't touch the glass with any tools used on the frame.

Once the old putty is removed, label each nail fastener or point and mark the spot in the frame. Using a pair of pliers, take off the old nails or brads. If the frame is painted, you'll need to chip off the paint using an instrument to remove the point.

Take measurements of the width and depth inside the frame opening if you need to buy a new glass. Subtract 1/8 inch from all sides to ensure that the glass you choose to replace fits. You will usually find the right size in numerous hardware stores and home improvement centers. Alternatively, you can have the new glass cut to size by most glass and glazing companies. If you do, be sure to purchase the glass piece less than a quarter-inch larger than the opening of the frame.

Set the New Pane

When replacing a window, it is recommended to choose energy-efficient glass. This will help you save money on your heating and cooling costs as well as helping you save the environment. You can also opt for an ornamental or historical glass style to enhance the aesthetics of your home.

Before you begin, clean the glass you are using to make sure there are no streaks or smudges. Scrape off the old glaze putty using a knife, and then brush off any leftover residue. It is advisable to work in a ventilated space, and you should have mineral spirits or a different solvent on hand for cleaning up the mess if you need to.

Installing a new window panel replacement begins by applying a thin layer of compound on the backstop. Place the pane in the rabbets, and press it down to hold it in place. Make sure that the window is at the center of the opening and only 1/8 inch remains between the glass face and the rabbet.

As you are at it you can sand and scrape the rabbets all around them to bare wood. Then, coat them with exterior replace glass Windows primer. This will prevent water from getting into the new pane. After the primer has dried and is dry, knead some putty until it's warm and malleable. Then, push it into the rabbets. It's OK to be a little rough, as the goal is to make an elongated seal that lasts.

Apply the Putty

In the past, prior to upvc or double glazing windows, the majority of windows were made from steel (usually zinc-coated) or wood and a single glass pane was dropped into them. Small nails, or spriggs as they were known were then put into the frame to keep the glass in the frame. If you look closely at the nails, it should be easy to get rid of them. If they are stubborn, you can spray them with silicone sealant dissolver or remover to break down the glue that holds them.

You can also use a heat gun to break down the old glazing putty, making it easier to chip it with a cutting instrument. This is a more secure option, but you must still be cautious not to concentrate the heat on a single area of the wooden surface, which could cause cracks to form. When using a heatgun, always wear leather gloves and eye protectors. Also, you should clamp the window down to stop it from moving while you take off the old putty.

It is crucial to clean the frame using a rag dipped into mineral turpentine prior applying any new putty. This will get rid of any dried putty and give the surface more grip. Apply a thin layer white putty along the inner edge of the groove in which the glass is to be placed. It is vital to get this right or the window won't sit in the groove correctly. The glazing points can then be replaced if needed after the putty is smoothed and shaped using a rag that has been soaked in Turpentine.

Apply the Oil

You'll have to remove the sash (the sliding portion of the windows that houses the glass) or the jamb liners, which are the sides of the frame. Pull out the top of the sash by pressing on the vinyl jambs that cover the frame's sides. Then, give it a twist to remove the latch springs at the bottom. Slider windows are generally the easiest to remove from the frame since you simply lift up the bottom portion of the sash.

After the old glass has been removed using a wirebrush or a utility knife to clean the frame. This will get rid of any dirt or paint that might have gotten stuck in the grooves of the glazing beadwork. You can also soften the glazing putty using a heat gun. Be careful not to burn wood. If you have to remove the grooves, sand them down to the level of wood.

Once the sash is removed, you can order a new window glass at an all-service hardware store. Be sure to take the measurements accurately and subtract 1/8 of an inch for shrinkage. Be sure to buy a package of glazing points to hold the glass while the new putty sets.

Before you begin to re-glaze the window, apply a thick coat of linseed oil onto the frame of the wood, and let it soak in completely. This will lubricate the wood, which will make your new glue last for a longer time than it would if it was not. Then, you can continue with the rest. Linseed oils can be used to lubricate the tracks and hinges of sliding doors. This will keep windows and doors running smoothly and stop them from squeezing or sticking.