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How to Replace Glass Windows

When a window pane is broken the gaps that result let moisture into the home. These holes can reduce energy efficiency and resale values.

Fortunately, a replacement is an affordable and simple option. You'll need metal glazing points, pliers, latex glazing putty and the heat gun. Wear safety glasses and gloves.

Measure the Window

Getting the measurements right can be the difference between success and failure in the success of a window replacement glass in windows. If you choose the wrong size replacement window, it could cost to replace a window a lot to install. It might not be able to fit properly into the opening. Follow these steps to measure your old window before you remove it.

Start by measuring the width of the window frame from three angles - the top, middle and the bottom. Use a tape measure and record each measurement. Remember that the window's width does not include any trim. Measure the frame height in three locations: the left side and the right side. Choose the shortest measurement and record it. Subtract 1/4 inch from both of these measurements to give an approximate estimate of the width and height.

When taking measurements of the height, make sure to account for any jamb trim. Then measure the distance from the inside of the right and left side jambs to the head jamb or if the window is covered with drywall instead jambs, measure to the top of the drywall.

Once you have the measurements, remove the nails and putty that are holding the old pane. If the molding on one side of the frame has been soiled you can use an old chisel or a paint scraper with a pull-type. If the molding is only in small pieces, you can cut it loose with an utility knife. Now you are ready to take measurements for the new window frame.

Remove the Old Pane

An errant baseball, a soaring branch or a careless cleaning session can break even the toughest of window panes. In the majority of cases, glass is held in place by glazier's putty and small metal clips called glazier's points. To replace a damaged glass pane, the first step is to remove any old points and glazing putty. The replacement can then be placed in place and glaze.

To prevent damage to the new pane, wear gloves and work on an un-slip surface. Utilize a utility knife to remove the putty from the rabbet. If the old putty is hard to remove, soften it using a hair dryer prior to cutting it with your knife. You could also use a heat 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 that have been applied to the frame.

After the old putty has been removed, Replace Glass Windows number the nail fasteners or points and mark where they were seated in frame. With pliers, take off the old brads or nails. If the frame is painted the paint needs to be removed using a knife before you can remove the nail.

Measure the width and depth of the frame opening, if you are planning to purchase a replacement glass for windows near me glass. Subtract 1/8 inch on both sides to ensure that the glass you purchase is suitable. Many hardware stores and home improvement stores offer the correct size. Alternatively, you can get the glass cut to size at the majority of glass and glazing businesses. If you decide to do this, make sure that the glass is a quarter inch smaller than the frame's opening.

Set the New Pane

When replacing windows, it's best to use energy-efficient glass. This will help you save money on heating and cooling costs and also helping you save the environment. You can also pick a decorative or historical glass style to enhance the look of your home.

Before you get started cleaning the new pane to make sure there are no smudges or streaks. Make use of a utility knife to scrape off the old glass putty and then clean away any leftover. It's a good idea to work in a well ventilated space, and you should have mineral spirits or a different solvent in your arsenal to clean up the mess, if needed.

Installing a new window begins by applying a thin layer of compound on the backstop. Place the pane into the rabbets, and press it to hold it in place. Work until the window is completely centered in the opening and only 1/8 inch space remains between the surface of the glass and the rabbet.

While you're at it Sand and scrape the rabbets around them until they are bare wood. Then, you can coat them with primer for exterior use. This will stop moisture from seeping in and damaging the new pane. Once the primer is dry then, you can knead a bit of putty until it's warm and malleable. Then, push it into the rabbets. It's okay to be a little rough here, as the aim is to create an effective seal that lasts.

Apply the Putty

In the past, prior to upvc and double glazing most windows were made from steel (usually galvanized) or timber and a single pane of glass dropped into them. The glass was then fixed by tiny nails, called spriggs, which were put into frames. They are often visible nails in the wood and if you can a good look at them it should be possible to remove them without breaking the glass. 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 heatgun to break down old glazing putty and make it easier to chip with a chipper. This is a more secure alternative, but you need to take care not to concentrate the heat in one area of the wood and crack it. When using a heatgun make sure you wear gloves made of leather and eye protection. Also, hold the window down to stop it from moving when you remove the old glue.

It is crucial to clean the frame with a rag dipped into mineral turpentine prior to applying any new putty. This will get rid of any dried putty and give the surface more grip. Apply a thin layer white putty on the inside edge of groove where the glass will be placed. This is essential because otherwise the window will not fit correctly in the groove. The glazing points can then be replaced if necessary after the putty is smoothed and shaped using a rag that has been soaked in turpentine.

Apply the oil

If it's a casement windows (which is hinged on the top and opens as the door) or a double- or single-hung window, you'll need to remove the sash, or the sliding part of the window that holds the glass. Take off the top of the sash by pressing it against the jambs of vinyl that cover the frame's sides. Then give it a twitch to free the latch springs on the bottom. Slider windows are typically the easiest to take off of the frame because you simply lift up the bottom of the sash.

After the old glass is removed, use a wirebrush and a utility knife to clean the frame. This will remove any dirt or paint that may have gotten stuck in the grooves of the glazing beadwork. You can also soften glazing putty by using the use of a heat gun. Be careful not to burn wood. If you need to remove the grooves, sand them down to bare wood.

After the sash has been removed, purchase your new window glass from a full-service hardware store. Make sure you take the measurements accurately and subtract 1/8 inch for shrinkage. Be sure to buy a package of glazing points to help hold the glass while the new putty is hardening.

Apply a thick coat of linseed to the frame of the wood before reglazing the window. Let it soak into. This will help to lubricate the wood and make your new putty stay on longer. Then, you can continue with the remainder. You can use the same Linseed oil to grease the tracks and hinges of sliding doors, too. This will keep the doors and windows running smoothly and stop them from squeezing or sticking.