winter approaches, ensuring that your double glazed windows are in top-notch condition becomes paramount. These windows, known for their energy efficiency and insulation properties, play a crucial role in keeping your home warm and secure during the colder months. To avoid drafts, dampness, and potential mold issues, it’s essential to perform a thorough inspection. Here are ten crucial things to check on your double glazed windows before winter sets in, ensuring a cozy and secure home environment.

  1. Seals and Gaskets: Start by inspecting the seals and gaskets around your double glazed windows. Over time, these components can wear out or become damaged, leading to drafts and reduced insulation. Look for visible signs of wear, such as cracks or gaps. If you spot any issues, consider replacing the seals or gaskets to maintain the integrity of the window’s insulation.
  1. Frame Integrity: Examine the frames of your double glazed windows for any signs of damage or warping. Damaged frames can compromise the overall effectiveness of the window, allowing cold air to seep in. Repair or replace any damaged frames to ensure a tight seal and optimal insulation.
  1. Glass Condition: Inspect the glass for cracks, chips, or any other damage. Damaged glass not only reduces insulation but can also pose a safety risk. Replace any damaged panes promptly to maintain the efficiency of your double glazed windows.
  1. Condensation Issues: Check for any signs of condensation between the glass panes. Condensation indicates a breach in the window seal, leading to reduced insulation. If you notice condensation, it may be necessary to replace the entire double glazed unit to restore its effectiveness.
  1. Weather Stripping: Examine the weather stripping around the window frames. Weather stripping is crucial for preventing drafts and maintaining a tight seal. If you find any gaps or signs of wear, replace the weather stripping to enhance the window’s insulation capabilities.
  1. Locks and Handles: Ensure that the locks and handles on your double glazed windows are in good working condition. Properly functioning locks not only enhance security but also contribute to a tight seal. Lubricate moving parts if necessary and replace any faulty locks or handles.
  1. Ventilation: Check the ventilation features of your double glazed windows. Proper ventilation is crucial to prevent condensation and mould growth. Ensure that ventilation mechanisms are clean and unobstructed, allowing fresh air to circulate while maintaining a warm and dry interior.
  1. Cleaning and Maintenance: Regular cleaning and maintenance are key to preserving the longevity of your double glazed windows. Clean the glass, frames, and sills to remove dirt and debris that can affect their performance. Additionally, lubricate hinges and moving parts to ensure smooth operation.
  1. Insulation Film or Curtains: Consider using insulation film or heavy curtains during winter. These additional layers provide extra insulation and help retain heat, reducing the workload on your double glazed windows. Install them before the cold weather sets in to maximise their effectiveness.
  1. Professional Inspection: For a comprehensive assessment, consider hiring a professional to inspect your double glazed windows. Experienced technicians can identify potential issues that may go unnoticed during a routine check, ensuring that your windows are in optimal condition for the winter months.


Taking the time to inspect and address potential issues with your double glazed windows before winter arrives is a proactive step toward maintaining a comfortable, energy-efficient, and secure home. By focusing on seals, frames, glass condition, and other crucial elements, you can ensure that your windows are ready to face the challenges of winter, providing you with a cozy and well-protected living space.