Why It's Important to Repair a Broken Window Seal
The presence of condensation on windows that cannot be removed is a sign that the window seal is damaged. It can also cause distortions in the view through the glass and affect the insulation of your home.
While defogging your windows can temporarily solve the issue, a permanent solution involves replacing the IGU. (IGU). This should be handled by a reputable window company to ensure the replacement is carried out correctly.
Expansion & Contraction
Over time, seals in double pane windows wear away due to contraction and expansion of the spacer separating the glass. This is due to the cycles of temperature that occur throughout the day. As the glass expands as sun heats it the seal is placed under pressure. When the glass cools during night the seal on the window contracts. These constant expansion and contractions could cause a crack in the window seal allowing humidity to enter the window, creating fog between the glass panes. The inert gases, like argon that are trapped between the panes of glass are also released through the crack 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-pane window. You might also notice a rise in your energy bill or feel drafts coming from the windows. In this time, your window frames could be pulled away from the walls or shift. This is a clear indication that the window seal needs to be replaced.
Replacing the seals on windows with dual panes is a fairly complex and labor-intensive project that typically requires removing both the old seal as well as the new one, and then cleaning both windows and replacing the IGU. While it is possible to perform the IGU replacement yourself but hiring a professional is highly recommended. This procedure is susceptible to errors that could cause the destruction of your home and pests.
A professional will also assist you in determining the best repair solution for your particular situation, and offer suggestions on a long-term plan for keeping your window sealed correctly. This could be a quick solution, like caulking the gap between the window frame and the wall to block water and bugs from entering your home, or it may be necessary to replace the entire window with a brand new IGU that is more resistant to weather conditions and seal damage. You can also put in the window using a different IGU with a better seal or is better suited to the climate of your home.
Weather Conditions
Window seals are made to endure harsh weather conditions. However, constant exposure can cause them to break. The most common causes are extreme temperature changes that can cause the glass to expand and contract, placing pressure on the window seal over time. This is particularly true for homes located in areas that experience hot summers and cold winters.
Window seals are also prone to damage caused by high humidity, storms and other environmental factors. Wind specifically, can be particularly tough on windows, causing them to move or loosen over time. replace window gasket can lead to fogging or condensation when air is trapped between the glass panes. While fogging isn't an immediate danger but it can affect the appearance of your windows and make them difficult to view through.
In addition, humidity and water can also affect window seals by promoting mold growth or causing rot or corrosion on the frame. If you're experiencing these issues, it is likely that the window seals need to be replaced.
Another indication that seals on windows are beginning to fail is a rise in energy bills. If your window seals have been damaged, your heating and cooling systems will have to work harder to keep your family members and you at ease. This will result in higher energy costs.
You might also notice that it is becoming more difficult to open or close your windows. This is a sign that the seals in your windows have become stiff and hindering them from opening and closing properly. This problem must be taken care of before it becomes a major issue and your windows will not be as efficient as they should.
You can extend the lifespan of your window seals by following the manufacturer's instructions for maintenance. It is crucial to clean them regularly with mild detergents or other approved cleaning agents, and keep them free of debris and dirt. It is also crucial to stay clear of using chemical strippers or heat guns on your windows as these can easily break the sealant material.
Damage
Contrary to single-pane windows from the past, modern triple-pane and double-pane windows have glass panes separated by air space, and then sealed completely around the edges to keep humidity out. Often, the spaces between the glass panes are filled with an inert gas like argon or krypton to further reduce transfer of heat or cold outside the window. These types of windows are also referred to as insulated glass units (IGUs).
Consult a professional if find any indications of broken seals or condensation. They will assess the situation to determine the best way to proceed. If you ignore this issue, it will cause more damage, resulting in higher energy bills and an impact on the comfort of your home.
The most cost-effective solution is to only replace the IGU and keep the frame you have. This is especially advantageous if the current frame is in good condition and has more R-value than the windows you originally had and allows you to preserve an impressive amount of insulation efficiency.
However, if your current frame is in poor shape or is outdated and has other damages to its exterior, a full window replacement may be your best choice for optimal energy efficiency and protection. This type of repair can be done quickly and easily by a professional, and can improve the appearance of your house while making sure that the window's insulation properties are restored.
If your window is still under warranty, the manufacturer or installer may be willing to repair or replace the damaged IGU for no cost. Review the window's warranty or contact the original installer to find out if this is a possibility for your particular situation.
Installation
Window seals play a crucial role in keeping drafts out and maintaining home energy efficiency. It's not just important to repair a broken window seal immediately you notice it, but also to do preventative maintenance to help avoid issues in the future.
Window maintenance is a continuous process that involves checking regularly for gaps and cracks and re-caulking when required, and cleaning. It is recommended that you caulk the window area each year in order to limit how much moisture and temperature affects the window seals. This is particularly important for older homes whose foundations have shifted since the initial installation.
Regular window maintenance can assist in identifying any problems before they become a problem. This allows you to plan a repair with a professional your windows as needed. If you notice condensation between your window panes, it's a sign that the frame and glass aren't properly sealed, which can lead to poor indoor air quality. If you hear a thumping sound when you press your window it could mean that you have to fix the window.

Physical damage to the window frame can also cause a window seal to break. This can happen if your kids or pets accidentally hit the window with a broom, or if harsh cleaning products like paint strippers are sprayed too close to windows. It could also happen if your windows are installed with aluminum frames, which do not offer the same insulation as wood or fiberglass.
A broken seal is best repaired or replaced if the windows are still covered by warranty. This will ensure that your window is quickly repaired or replaced, and may also give you the chance to upgrade to a more energy-efficient frame such as fiberglass or wood.
If you have a broken insulated glass unit is usually recommended to hire a professional who can replace it. This is the most cost-effective option. It's worth noting, though that a lot of modern windows come with removable IGUs that contain the insulating gas, allowing you to replace just the glass unit instead of the entire window and frame.