How to Repair a Cracked Window
A cracked window can be repaired temporarily using DIY methods, but it is often best to seek professional help to ensure a lasting solution.
Whether the cracked glass was caused by an accident, extreme weather, or natural wear and tear, it’s important to understand the options for repairing or replacing the damaged pane. In this guide, we’ll explore how to repair a cracked window, when a professional replacement is necessary, and the potential risks of DIY repairs.
Why you should choose professional double glazing repair Glasgow
Compromised Structural Integrity
A cracked windowpane weakens the entire structure of the window. Even if the crack seems minor, it can easily spread, especially under pressure or temperature changes. Over time, a small crack can turn into a much larger one, eventually leading to a complete shatter. By choosing a professional replacement, you ensure the structural integrity of your window is restored, preventing the risk of further damage or injury.
Safety Concerns
Cracked windows can be extremely dangerous. The weakened glass can break unexpectedly, causing potential injury to anyone nearby. DIY repair methods, like using clear nail polish or two-part epoxy, may provide a temporary fix, but they do not restore the strength of the glass. Replacing the entire window with professional help guarantees that the glass meets safety standards and that your home remains a safe environment for your family.
Reduced Energy Efficiency
A cracked window can severely impact the energy efficiency of your home. Damaged glass and broken seals allow drafts to enter and conditioned air to escape, leading to increased energy consumption and higher utility bills. Professional replacement of blown windows ensures that your windows are sealed properly, restoring their insulating properties and helping to maintain a consistent indoor temperature. This not only improves comfort but also reduces your energy bills.
Security Risks
Windows play a crucial role in your home’s security. A broken window is an easy target for intruders, as it is much easier to break through than an intact window. DIY repairs may temporarily hold the glass together, but they do not provide the same level of protection as a properly replaced window. A professional replacement restores the security of your windows, giving you peace of mind that your home is properly protected.
Increased Risk of Moisture and Mould
Broken glass can allow moisture to seep inside, leading to condensation between the panes or even water damage to the window frame and surrounding areas. This can result in mould growth, which poses health risks to the occupants of your home. A professional replacement eliminates these risks by ensuring a tight, moisture-resistant seal, keeping your home dry and free from mould-related issues.
Common Issues with DIY Window Repairs
While it might be tempting to try and fix a cracked window yourself, Do-it-yourself glass repairs are typically only a temporary solution and often come with their own set of issues:
- Temporary Fix: Methods like applying clear nail polish or two-part epoxy may temporarily fill in the crack, but they do not restore the strength or efficiency of the window. These fixes are often short-lived and can result in the crack spreading further over time.
- Compromised Appearance: DIY window glass repairs can leave visible marks or uneven surfaces on the glass, making the window look unattractive. For example, using a putty knife to apply epoxy or adhesive can leave excess epoxy on the glass, which can be difficult to remove and result in a poor appearance. A professional replacement ensures that the new window is flawless, maintaining the aesthetic appeal of your home.
- No Guarantee: When you attempt a DIY repair, there is no guarantee that the window will remain intact or that the crack won’t spread. Professional glazing companies provide warranties for their work, ensuring that you receive a quality replacement that will last.
How to Attempt a Temporary DIY Repair (Not Recommended for Long-Term Use)
If you decide to attempt a temporary DIY repair, here are some steps you might take. However, please note that this is only a short-term solution, and professional replacement is always recommended. It is incredibly unlikely you will be able to fix a broken window or repair cracked glass without professional training. If you are unsure how to know when your uPVC window needs replacing, just get in touch.
Materials You Will Need:
- Two-Part Epoxy: Used to fill in the crack and provide temporary stability to potentially prevent a crack from spreading.
- Razor Blade: To remove excess epoxy after it dries.
- Glass Cleaner: To clean the window before and after the repair.
- Putty Knife: To apply the epoxy mixture.
- Adhesive: In some cases, a glass adhesive can be used to hold the crack together.
- Acetone: For cleaning up excess epoxy from the glass surface.
Steps to Repair a Cracked Window Temporarily
- Clean the Glass: Use glass cleaner to thoroughly clean the cracked glass, ensuring there is no dirt or debris. This helps the adhesive or epoxy bond better.
- Mix the Epoxy: Follow the instructions on your two-part epoxy to mix it properly. Typically, you will need to mix equal parts of the resin and hardener.
- Apply the Epoxy: Use a putty knife to apply the mixed epoxy to the crack. Make sure it fills the entire crack, and try to smooth it out as much as possible.
- Remove Excess Epoxy: Once the epoxy has dried, use a razor blade to carefully remove any excess epoxy from the surface of the glass. Be gentle to avoid scratching the glass.
- Clean Again: Use glass cleaner and, if necessary, acetone to clean the glass and remove any leftover residue.
Why Choose a Professional Replacement?
Professional window replacement is the most effective way to address a cracked window. A glazing expert can assess the damage, determine the best course of action, and replace the window with a high-quality unit that restores both the appearance and functionality of your home. Here are some key benefits of opting for a professional replacement:
- Expert Assessment: A professional can determine whether the window needs a complete replacement or if other components, such as the frame, also require attention. They can also identify the type of glass needed for the replacement.
- High-Quality Materials: Professionals use industry-standard materials that are designed to provide long-lasting durability and energy efficiency.
- Proper Installation: A properly installed window will prevent drafts, moisture, and future issues. Professionals ensure that your new window is installed correctly, maintaining your home’s energy efficiency and security.
The Risks of Ignoring a Cracked Window
Ignoring a cracked window can lead to a range of serious problems, including:
- Spreading Cracks: Even a minor crack can grow larger due to temperature fluctuations, pressure, or accidental impact. This increases the risk of the window shattering unexpectedly.
- Increased Energy Costs: Cracks allow heat to escape during the winter and cool air to escape during the summer, leading to increased energy consumption and higher utility bills.
- Moisture Damage: Moisture can enter through cracks, leading to condensation between the panes or damage to the window frame. This can result in rot, mould, and costly repairs.
To get your windows fixed promptly and professionally, contact Totalseal Repairs today.





