Draught proofing usually makes the most sense when the house feels uncomfortable rather than because the headline bill saving will be dramatic. The better case is often comfort plus modest savings, not a huge payback number on its own.
Last reviewed: 16 April 2026 - UK-focused guidance, not an installer quote
Simple draught proofing is often worth doing around obvious problem spots such as doors, loft hatches and older window gaps, especially when the materials are cheap and easy to fit. The cash saving is real but the comfort improvement is often what households notice first.
The strongest wins are usually the easy-to-fix gaps that leak cold air into occupied rooms, not every tiny crack in the building.
External doors, letterboxes, keyholes, loft hatches, floorboard gaps and obvious window draught points.
Lower heat loss, fewer cold spots, better comfort near windows and doors, and a tidier heating pattern.
Blocking intended ventilation or treating all airflow as a defect, especially in rooms with moisture risks.
A cheap round of sealing obvious gaps around a front door and loft hatch may not slash the annual bill, but it can make the sitting room feel less chilly and help the main heating work more evenly. That combination often makes the job feel worth it even when the pure payback is not spectacular.
If a room is genuinely hard to heat because insulation is poor or glazing is weak, draught proofing may help but it will not solve everything on its own. Treat it as one of the quicker, cheaper steps rather than the full plan.
Compare a simple sealing job against a bigger insulation upgrade.
Useful when the gaps are part of a bigger window-quality question.
Helpful if the room is being heated electrically and every weakness feels expensive.