You Don't Need a Smart Thermostat to Save on Energy
The UK energy crisis has made energy efficiency more relevant than ever. But many of the most effective ways to reduce heat loss and cut your bills don't require expensive upgrades or specialist contractors — they require a tube of draught excluder, a roll of insulation tape, and an afternoon.
1. Stop Draughts (The Highest-Impact Fix)
Up to 25% of heat loss in a UK home comes from draughts — gaps around windows, doors, floorboards, and pipes. These are almost all DIY-fixable:
- External doors: fit a door draught excluder to the bottom (self-adhesive brush or rubber seal types, £5–15) and keyholes cover (£2–5).
- Letterboxes: fit an insulated letterbox cover or brush seal (£5–10).
- Windows: self-adhesive foam tape applied to the frame creates a seal when closed (£3–6 for a full house).
- Floorboards: gaps between old floorboards let cold air rise from below. Fill them with wood filler or decorator's caulk (for small gaps) or purchase specific floorboard draught strips.
- Around pipes and cables entering walls: use fire-rated expanding foam to seal the gap around any pipe or cable passing through an external wall.
2. Insulate Hot Water Pipes
Hot water pipes in unheated spaces (under floors, in the loft, in the garage) lose heat constantly. Foam pipe lagging costs £1–2 per metre and takes minutes to fit — just cut to length and press around the pipe. This reduces heat loss from the pipes, which means your boiler does less work to maintain your hot water temperature.
3. Bleed Your Radiators
Air-locked radiators (cold at the top, warm at the bottom) are working harder than they need to. A 5-minute bleed restores full output and can reduce energy consumption by up to 15% from your heating system.
4. Service or Clean Extractor Fans
A blocked or poorly functioning extractor fan in your bathroom or kitchen doesn't just fail to remove moisture (causing damp and mould) — it also continues to draw power for zero benefit. Clean the grille and fan blades with a damp cloth and ensure it's actually pulling air out effectively.
5. Fit Radiator Reflector Panels
Radiators on external walls lose a significant percentage of their heat into the wall rather than the room. Radiator reflector panels (foil-backed insulating sheets that fit behind the radiator) cost £5–15 per panel and direct heat back into the room. Easy to cut to size and fit without removing the radiator.
6. Secondary Glazing Film
For homes with single-glazed windows, secondary glazing film (a self-adhesive clear film stretched over the window frame and shrunk with a hairdryer) reduces heat loss significantly — not as effective as double glazing, but for £10–15 per window it provides meaningful improvement.
The Compound Effect
None of these fixes alone will halve your energy bill. But together, done across the whole house, they can meaningfully reduce heat loss, lower your heating costs, and make your home more comfortable. Most homes have several of these improvements waiting to be made. The materials cost under £100 for a typical house. The saving over one winter can easily exceed £200.