Stop the Draft: How to Repair Draughty Double Glazed Windows

Double glazed windows are a popular choice for homeowners due to their energy efficiency, noise reduction, and security features. A particular benefit of double glazed windows is their superior insulation, helping keep your home warm in the winter and reducing the amount of cold air that can come in. This is why draughts from double glazed windows can be particularly troublesome as you are losing that key benefit. Proper installation and higher quality helps to reduce the chance of draughts as well as regular maintenance.

However, even the best double glazing can develop draughts over time, which can result in uncomfortable chills and higher energy bills. Fortunately, repairing draughty double glazed windows is a straightforward process that can be done by most homeowners with some basic tools and materials.

We’ve put together a step by step process designed to help you identify and resolve draught related issues with your double glazed windows. Heating costs are already soaring so don’t lose more of it to the great outdoors and ensure your home is well protected.

Step 1: Identify the Source of the Draught

The first step in repairing draughty double glazed windows is to identify the source of the draught. The most common places for draughts to occur are around the window frames, sashes, and seals. Start by inspecting the perimeter of the window when closed, paying close attention to any gaps or cracks in the frame or sashes. If you can feel air moving through these areas, you have found the source of the draught.

Step 2: Seal Any Gaps or Cracks

Once you have identified the source of the draught, it's time to seal any gaps or cracks that you have found. You can do this using either silicone or caulk, depending on the size and location of the gap. For small gaps, silicone sealant is often the best option, as it is flexible and long-lasting. For larger gaps or cracks, use a caulking gun to apply caulk, which will fill the gap and create a more robust seal. It goes without saying that you should let the silicone or caulk dry fully.

Step 3: Replace Any Worn Seals

In some cases, draughts may be caused by worn or damaged seals around the window. If this is the case, you will need to replace the seals to stop the draught. Start by removing the old seal using a sharp knife or scraper. Then, measure the length of the old seal and cut a new seal to the same size. Finally, press the new seal into place, making sure it is firmly attached. This can be tricky for DIY beginners so if you are not totally comfortable with replacing a seal, it’s better to contact a double glazing repair team instead of trying the replacement yourself. You may just cause more damage and if the seal isn’t properly replaced, you won’t see any real difference anyway.

Step 4: Check for Additional Draughts

After sealing any gaps or replacing any worn seals, it's essential to check for any additional draughts. You can do this by running your hand around the perimeter of the window frame and feeling for any air movement. If you still detect a draught, go back and inspect the area again to see if there are any additional gaps or cracks that need sealing.

By following these steps, you can stop draughty double glazed windows and enjoy a more comfortable and energy-efficient home. Remember to inspect your windows regularly for any signs of draughts, and take action to repair them as soon as possible. If you are unsure about any aspect of window repair, we are always happy to help and provide you with any assistance you require. We are professional and local double glazing specialists so please don’t hesitate to give us a call if you have any questions about your double glazed windows.