Why Draught-Proofing Works
Uncontrolled draughts can account for up to 20% of heat loss in a typical UK home. Sealing these gaps is one of the cheapest and most effective ways to reduce energy bills.
Where to Check for Draughts
- Around window frames and where glass meets frame
- Gaps under and around doors
- Letterboxes and keyholes
- Loft hatches
- Around pipes and cables entering walls
- Floorboard gaps
- Unused chimneys
DIY Draught-Proofing Solutions
Doors
Fit a brush or hinged-flap draught excluder to the bottom of external doors. For the sides and top, use self-adhesive foam strips or rubber seals. Cost: £5–£15 per door.
Windows
Self-adhesive foam strips work well for wooden sash windows. For modern windows, check the rubber seals haven't perished and replace if needed. Cost: £2–£10 per window.
Letterboxes
Fit a letterbox brush or flap to stop cold air blowing through. These cost around £5–£10 and take minutes to install.
Chimneys
If you don't use your fireplace, fit a chimney balloon or cap to stop warm air escaping. This alone can save £30–£50 per year.
What NOT to Draught-Proof
Never block ventilation that's there for a reason:
- Extractor fans in kitchens and bathrooms
- Air bricks (they prevent damp)
- Trickle vents in double-glazed windows
- Rooms with gas appliances (they need airflow)
Total Investment
A complete DIY draught-proofing job typically costs £50–£100 in materials and pays for itself within the first year through energy savings.
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