Why It's Important to Repair a Broken Window Seal
Condensation on windows that can't be cleaned away is a clear indication that the window seal has broken. It also affects the insulation capacity of your home and could cause distortion of views through the glass panes.
Defogging can temporarily fix the problem, but the best solution is to replace the insulated glass units (IGU). This is best handled by a reputable window company to ensure the replacement is done properly.
Contraction and Expansion
Seals in dual-pane windows may break down over time due to the expansion and contraction of spacers that separate the glass. This is due to the temperature cycles that occur throughout the day. As the glass expands as sun heats it the seal is placed under pressure. In the evening, as the glass cools down, the window seal contracts. These constant expansion and contractions can cause a break in the window seal allowing humidity to enter the window, creating fog between the glass panes. The inert gases such as argon that are trapped between window panes also escape through this break in the seal. This reduces the insulating properties of the window.
Other indicators of a broken window seal could be visible staining or mold on the edge of a double-paned window. You may also notice an increase in your energy bills or feel drafts in the vicinity of the windows. At this point, your window frames could also pull away from the walls or shift. This is a sign that you should replace the window seal.
It's a complicated and labor-intensive task to replace the seals on a double paned window. It usually involves removal of the old seal, cleaning the windows, and replacing the IGU. Although it is possible to complete the IGU replacement yourself but hiring a professional is highly recommended. Incorrect decisions during this process could lead to drafts, water damage, pest infestation and even more expensive repairs later on.
A professional can help you find the right repair solution for your situation and give advice on how to maintain the seal of your window over time. It could be a temporary fix such as caulking between the window frame, and the wall, in order to prevent the entry of water and bugs into the home. It could also mean replacing the entire IGU with a brand new one that is more durable against weather conditions and seal damage. You could also install a new window that uses an alternative IGU with an improved seal or more suitable for the climate of your home.
Weather Conditions
Window seals are made to endure harsh weather conditions. However, prolonged exposure can cause them to break. Extreme temperature changes can cause the glass within the window to expand and contract. This puts pressure on the seal over time. This is particularly true for homes located in areas with hot summers and cold winters.

Window seals are also susceptible to damage caused by high humidity, storms and other environmental conditions. Wind particularly, can be particularly tough on windows and cause them to shift or loosen over time. If this happens air can get infiltrated between the glass panes in an insulating window, which can cause condensation or fogging. While fogging is not an immediate danger however it can affect the appearance of your windows and make them difficult to look through.
In addition, humidity and water can affect window seals by promoting mold growth or causing corrosion or rot on the frame. If you're experiencing these issues you're likely to find that your window seals require replacement.
Another indication that window seals are beginning to fail is a rise in energy bills. If your window seals have been damaged then your cooling and heating systems will have to perform more efficiently to keep your family and you comfortable. This could cause higher utility bills.
You may also notice it getting more difficult to close or open your windows. This could be a sign that the window seal has become stiff, which is preventing it from properly opening and closing. This problem must be addressed before it becomes a major problem, otherwise your windows won't be as energy efficient as they could be.
Follow the maintenance tips provided by the manufacturer to prolong the life of the window seals. It is important to wash them regularly using mild detergents or other approved cleaning agents and to keep them free of debris and dirt. Avoid using heat guns and chemical strippers to clean your windows. They are able to break down the sealant.
Damage
Contrary to single-pane windows from the past, today's modern triple- and double-pane windows are made of glass that is separated by air space, and then sealed completely around the edges to keep humidity out. The spaces between the glass panels are usually filled with inert gases such as Krypton and argon, which minimizes the transfer of heat and cold outside the window. These windows are also known as insulated glass units (IGUs).
Call a professional if you detect any indications of damaged seals or condensation. They can evaluate the situation and determine the best option for you. Ignoring the issue will only cause more damage and will result in increased energy costs and more visible impact on the comfort of your home.
Generally speaking, the cheapest option is to replace your IGU and keep the current window frame. This is particularly beneficial when the frame you have is in good condition and has a higher R-rating than the windows you originally had, allowing you to retain a large amount of insulating efficiency.
However, if the current frame is in a poor state or has a long-lasting issue and is causing external damage, a complete window replacement could be your best choice for optimal energy efficiency and security. This kind repair can be completed quickly and easily by a professional, and can improve the appearance of your house while restoring the window's insulation properties.
If your window is under warranty, the manufacturer or installer may be willing to repair or replace the damaged IGU for no cost. If you're not sure, check the paperwork for your window or contact the installer to see if it is possible.
Installation
Window seals are crucial to stop drafts from entering and ensuring energy efficiency in your home. It's not only important to fix a damaged window seal immediately you notice it, but to also perform preventative maintenance that helps prevent issues in the future.
Window maintenance is a continuous procedure that involves checking for cracks, gaps and re-caulking as needed and also cleaning. Re-caulk the window seals at least once a year to minimize the effects of temperature and moisture. double glazing sealed unit replacement is particularly critical for older homes that have been shifting since their original installation.
Regularly checking your windows for damage helps you spot any issues before they become an unsound seal, and you can make an appointment with an appointment with a professional to repair the issue when required. If you see condensation between the window panes, it's an indication that the glass and frame aren't sealed properly and can result in poor indoor air quality. If you hear a tap sound when you press the window, it could mean that you should repair the window.
The window seal could break in the event that the frame of the window is damaged. This could happen if your children or pets accidentally hit a window with the broom or cleaning products like paint strippers were used too close to windows. It could also happen when windows are fitted with aluminum frames, which do not provide the same insulation like fiberglass or wood.
If your windows are more recent and still under warranty, a repair or replacement is often the best option for a damaged seal. This will ensure that your window is quickly repaired or replaced, and could also give you the opportunity to upgrade to a more energy-efficient frame like fiberglass or wood.
If you've broken an glass insulated unit it is recommended to seek out an expert who can replace it. This is the most cost-effective option. Many modern windows have removable IGUs that contain the insulating gases, which allows you to replace the glass unit instead of the entire window.