Do-It-Yourself Double Glazing Repairs

Double glazing can help keep buildings warm, but it can also cause problems over time. Leaks, broken glass, or foggy windows are all issues that can lead to energy loss, expensive repairs and health problems.

FENSA certified installers can help you maintain and repair your double-glazed windows to ensure that it meets energy efficiency requirements for legal compliance and potential resale value.

Broken Panes

A broken window can create a lot of problems, as it can block light, air and even insects. While you could certainly engage a professional to repair the broken pane, it's also possible to repair the damage yourself at a fraction of the cost.

To do this, you must remove the old pane. Start by putting on safety glasses, work gloves and dust masks to protect yourself from lead shards and glass dust. Install a sturdy work surface that is ventilated in an area. It is recommended to put a drop cloth underneath the work area to catch any loose glass when it is removed. It is recommended to keep a HEPA vacuum close by to clean up dust, debris, and hazardous waste while you work.

Once the old window is removed and the old window is removed, use a knife to scrape away the old glazing putty. Be careful not damage the wooden frame of the window. If the old putty is stubborn, you can try using a heating gun to soften it prior to scraping it away with a knife. Wear safety goggles and be cautious about getting hot wood or glass fragments in your eyes when using a heating gun.

The next step is to prepare the frame for the new pane. To be prepared for wood expansion and contraction take the opening measurement and subtract one-sixteenth of an inch in both directions. The local hardware store can then cut a piece of double strength glass to precisely fit the opening. Dry-fit the new glass to ensure it fits snugly before putting it in.

Once you have the new glass in place, put a small amount of caulk made from latex around the edges of the opening to create a weather-proof seal. Install the glazing points to secure the new pane. Typically, you will need two points along each edge for standard sizes of window glass.

After the new glazing compound is dry you can then paint it to match the rest. If you're worried about the risk of cracks you can use a sturdy strip of masking tape to prevent superficial cracks from worsening.

Frames that are damaged

The first thing you need to do is look over the frame. You will need to have it professionally repaired if there are cracks or rust or corrosion, or if the frame appears to be broken into two pieces. Metal frames are not able to be glued and any attempts to solder or weld them will cause permanent damage.

If repairmywindowsanddoors isn't damaged, you may make use of a small brush and some conservation detergent or water to wash the frame with care. This will get rid of any grease, dirt or dust that has accumulated through the years. A careful cleaning of old frames with intricate carvings or gesso can reveal the original finish that sparkles beneath the layers of dust.

If the frame has been damaged You will require needle-nose pliers and a flat surface, wood putty, sandpaper and a small clamp. Start by taking off the glass, photo and back of the frame. Take care to remove the frame at the corners where you see nails or brads. Open the joints and remove any glue that was used. Apply new glue.

Loose Compound

The glazing compound that is used to hold glass window panes in their wooden frames is a vital part of any historic building's energy efficiency. It seals wood, bonds glass to frames and sheds water to prevent damage caused by water over time. The compound may be damaged or cracked, which could let air in which reduces insulation and increasing utility costs. Be sure to keep up with the maintenance work on your double-glazed windows to ensure they are operating smoothly.


The weatherstripping can be worn out or loose if you notice drafts around your window frames. Replacing this seal will reduce energy bills and improves comfort. If you hear loud noises outside, such as machinery or traffic, this could mean that the glass tape is worn out.

Remove the old tape from the edge of the frame and scrub the area thoroughly. Apply a new piece of tape to the frame edge and press it down. You can purchase this at any hardware store and it's a low-cost option to boost the performance of your double-glazed windows.

Standard super glues are great for wood, metal, and other common materials. However they're not suitable for glass surfaces. Find a glass-based adhesive like Loctite Extreme Glue Gel. This kind of adhesive is made to resist moisture and UV light, making it a good alternative for repairing double-glazed windows.

Before you begin repairing your windows, you'll need to clean the the frame and sash using a degreaser to ensure that the new glue is able to stick. Then prepare the area that will be glazed by applying an oil-based primer. Make sure to prime the entire area including the back of the sash where it rests within the frame.

While you can repair many problems with double-glazed windows, if they are badly damaged or do not provide effective insulation, replacement may be the best choice. Get a professional handyman or glazier to make the best decision. Regular maintenance and repairs can keep your windows looking great for many years.

Foggy Panes

Foggy windows are caused when the window seal is damaged. This allows air to enter and slowly build up moisture between the glass panes. Foggy windows can trigger many problems, from condensation and calcium deposits to black stains and fungus. It's not just unsightly but also results in lower energy efficiency and increased heating or cooling costs. Fortunately, the issue is fixable. Foggy windows are typically caused by a simple moisture buildup, so the initial step is to get rid of as much moisture as you can. You can do this by using a defogging product or shaving cream. If these measures are not working then it's time to consult a professional.

The reason double pane windows work is because they have a space between them. This space is filled the gas argon or krypton. These non-toxic gases are denser than air and slow heat transfer. If the gas has leaking out your windows, they're not adequately insulated. Replacing your windows with new IGUs will not only stop the fogging but restore your home's energy efficiency too.

Many homeowners are under the impression that they need to replace their whole window if it starts to get foggy, however this is not always the situation. In fact, some glass shops will offer to replace only the insulation glass unit (IGU) without replacing the entire frame or sash. This is a cheaper solution that can be just as effective in fixing your windows.

While there are a few DIY remedies to prevent window condensation, like defogging cream or shaving gel, it's best to call an expert to ensure that the job is done safely and in a correct manner. A window repair specialist will first make holes in the glass and then inject cleaning solution between the panes. They will then clean the soiled surface and dry the inside of the window, restoring its appearance and functionality. To learn more about this procedure, or to schedule a no pressure in-home consultation, contact an expert in your area for window replacement and repairs.