Feeling a draught near your window can create discomfort and increase energy bills. Several factors contribute to this issue, and addressing them ensures your home stays warm and energy-efficient. Understanding the causes helps you determine the best solution.

Common Causes of Draughty Windows

Damaged Seals

Window seals play a critical role in keeping out wind and moisture. Over time, wear and tear, exposure to UV rays, or fluctuating temperatures can cause seals to crack or deteriorate, allowing air to pass through.

Warped Frames

Wooden and older uPVC frames can warp or shrink due to age, temperature changes, or moisture. This warping creates gaps between the frame and the sash, letting the wind in.

Single-Glazed Windows

Single-glazed windows provide less insulation than modern double or triple-glazed alternatives. These older designs struggle to block draughts effectively and allow more airflow through the glass.

Loose or Improper Fitting

Improper installation can leave gaps between the window frame and the wall. Loose fittings from wear or insufficient maintenance can worsen this problem over time.

How to Identify the Source of the Draught

Conduct a Visual Inspection

Check for visible cracks, gaps, or signs of wear around the frame and seals. Pay close attention to corners, as these areas often show the most damage.

Perform a Smoke Test

Light a candle or use a stick of incense near the window’s edges. If the flame flickers or the smoke moves erratically, air is entering through a gap.

Feel for Air Movement

Run your hand slowly along the edges of the window on a windy day. Cold spots or noticeable airflow indicate where the draught comes through.

Solutions to Stop the Wind

Replace Worn Seals

Install new weatherstripping or gaskets to replace damaged seals. These affordable materials effectively block airflow and prevent moisture intrusion.

Apply Sealant to Gaps

Use silicone caulk or a similar sealant to close gaps around the frame. This quick fix eliminates small openings and provides extra insulation.

Upgrade to Double-Glazed Windows

Consider replacing single-glazed windows with double or triple-glazed options. These modern designs improve insulation and reduce draughts significantly.

Repair or Replace Warped Frames

If the frame shows signs of warping, consult a professional to repair or replace it. Properly fitting frames ensure a snug seal against the elements.

Install Secondary Glazing

Add a second pane of glass over existing windows as a cost-effective alternative to full replacement. Secondary glazing reduces airflow and boosts thermal efficiency.

Preventative Measures to Avoid Future Draughts

Perform Regular Maintenance

Inspect your windows annually for signs of wear or damage. Addressing minor issues early prevents them from becoming larger problems.

Keep Frames and Seals Clean

Dirt and debris can weaken seals and encourage warping. Regular cleaning maintains their integrity and prolongs their lifespan.

Check for Proper Installation

When installing new windows, hire experienced professionals to ensure a precise fit. Proper installation minimises the risk of future draughts.

Conclusion

Feeling the wind through your window often points to damaged seals, warped frames, or outdated glazing. Identifying the root cause allows you to take effective action, whether repairing seals, upgrading windows, or improving maintenance. By addressing the issue, you can enjoy a warmer, more energy-efficient home.