How To Make A Home More Energy Efficient
This guide will show you practical steps to make your home more energy efficient, helping you save money on bills and reduce your carbon footprint. You’ll learn how to tackle common heat loss areas like draughts and poor insulation, optimise your heating, and use appliances more wisely. It’s perfect for homeowners and renters in the UK who want to lower their energy consumption without needing complex tools or professional help for every step.
Fast Answer
- Best first step: Find and seal draughts around windows and doors.
- Quickest saving: Turn down your thermostat by just 1 degree.
- Biggest impact: Improve loft and wall insulation.
- Daily habit: Switch off lights and unplug unused electronics.
Before You Start
- A basic energy bill from the last 12 months to compare against.
- Access to all rooms in your home, including lofts and basements if applicable.
- Basic tools: screwdriver, utility knife, measuring tape.
- Materials like caulk gun, caulk sealant, weatherstripping tape, draught excluders.
- A pen and paper or a tablet for noting down your findings.
- Ability to safely reach high windows or use a sturdy step ladder.
- Understand that some larger insulation projects may require professional assessment.
Step-by-Step Instructions
1. Conduct a DIY Home Energy Check
Before making changes, it's wise to understand where your home might be losing energy. Start by walking through each room. Feel for cold spots near windows, doors, and electrical sockets. Use a lit incense stick or a damp hand to detect subtle air movements around these areas. Check your loft hatch for gaps and make sure pipes and tanks are insulated. Note down all your findings.
This initial check helps you prioritise your efforts, focusing on the areas that need the most attention first. For example, if you find strong draughts, sealing them will likely be more effective initially than upgrading light bulbs, though both are important.
2. Seal Up All Draughts
Draughts are one of the quickest ways your home loses heat. Focus on windows, doors, letterboxes, keyholes, and even gaps around pipework and electrical outlets. For windows and doors, apply self-adhesive foam or rubber weatherstripping tape around the frames where they meet the sash or door. For larger gaps or cracks in walls, use caulk or mastic sealant, applied with a caulk gun.
Don't forget the bottom of doors; draught excluders (either brush strips or fabric 'snakes') can make a big difference. For keyholes, consider a keyhole cover. These small fixes add up, creating a much warmer and more comfortable home, reducing the need to turn up the heating.
3. Improve Your Home's Insulation
Insulation is crucial for keeping heat in during winter and out during summer. The two main areas to focus on are your loft and walls. If your loft is easily accessible and has less than 270mm of insulation, adding more is a highly effective step. You can often roll out mineral wool insulation yourself, taking care to wear protective gear.
For cavity walls (where there's a gap between inner and outer walls) or solid walls, professional insulation is usually required. Cavity wall insulation involves injecting insulating material into the gap, while solid wall insulation is applied to the inside or outside of the walls. These measures can significantly reduce heat loss through your home's structure. Always check for damp issues before insulating walls.
4. Optimise Your Heating System Settings
Your heating system is often the biggest energy user. Simple adjustments can lead to big savings. Start by lowering your thermostat by just 1 degree Celsius; this can cut heating costs by around 10% without a noticeable difference in comfort. Set your heating timers to come on only when needed, not all day.
Make sure your radiators are working efficiently. Bleed radiators regularly to release trapped air, which stops them heating up properly. Check that furniture isn't blocking radiators, as this stops heat from circulating effectively. If you have thermostatic radiator valves (TRVs), use them to control the temperature in individual rooms, lowering them in rooms you don't use often.
5. Control Your Hot Water Usage
Heating water uses a lot of energy. If you have a hot water cylinder, ensure it's well-insulated with an insulating jacket, especially if it's an older model. This keeps the water hotter for longer, so your boiler doesn't have to work as hard. Also, check the temperature setting on your hot water cylinder; it should be hot enough to kill bacteria (around 60°C) but not excessively hot, which wastes energy.
Beyond insulation, think about your daily habits. Take shorter showers, and consider installing an eco-shower head that reduces water flow while maintaining pressure. Only boil the amount of water you need in the kettle. When washing dishes, scrape plates before washing rather than pre-rinsing under hot running water.
6. Switch to Energy-Efficient Lighting
Lighting might not be the biggest energy drain, but it's an easy win. Replace old incandescent or halogen bulbs with LED (Light Emitting Diode) bulbs. LEDs use up to 90% less energy and last much longer, sometimes for decades. While the upfront cost is higher, the savings on your electricity bill and the reduced need for replacements quickly make them worthwhile.
Always remember to switch off lights when you leave a room, and make the most of natural daylight by keeping curtains and blinds open during the day. Consider installing motion-sensor lights in areas like hallways or utility rooms if people often forget to turn them off.
7. Tackle "Phantom Load" or Standby Power
Many electronic devices consume power even when they are switched off but still plugged in – this is known as "phantom load" or "standby power." Think about your TV, games consoles, phone chargers, and computers. While individually small, collectively this energy waste can add up over a year, potentially costing you dozens of pounds.
Get into the habit of unplugging devices when they are not in use or using extension leads with individual switches, so you can easily turn off multiple items at once. For things you use daily, like your kettle, simply switch it off at the wall socket after use. This simple habit requires no special tools and can lead to noticeable savings.
8. Use Appliances More Smartly
Your large appliances, such as washing machines, dishwashers, fridges, and freezers, are significant energy users. Always try to run your washing machine and dishwasher with full loads to maximise efficiency. Use the eco-settings on these appliances, which often use less water and lower temperatures, even if they take a bit longer.
For fridges and freezers, ensure their seals are airtight to prevent cold air escaping. Defrost your freezer regularly to prevent ice build-up, which makes the appliance work harder. Keep them away from heat sources like ovens or direct sunlight, and leave a gap behind them for air circulation. Small changes in how you use these big appliances can significantly cut down your energy bill.
9. Improve Ventilation Wisely
While sealing draughts is important, proper ventilation is also key for a healthy home and to prevent damp and mould. The trick is to have controlled ventilation, not uncontrolled heat loss. Regularly opening windows for 5-10 minutes at a time, especially after showering or cooking, helps to refresh the air without letting your home get too cold.
Ensure extractor fans in bathrooms and kitchens are clean and working effectively. They help remove moisture and stale air without excessive heat loss. Consider trickle vents on windows, which allow a small amount of continuous airflow, or a whole-house mechanical ventilation system for more advanced controlled ventilation. Balancing fresh air with keeping heat in is crucial for both comfort and energy efficiency.
10. Monitor Your Energy Usage
To truly understand the impact of your efforts, start monitoring your energy usage. If you have a smart meter, use its in-home display to see how much energy you're using in real-time. This helps you identify peak usage times and understand which appliances consume the most. Many energy providers also offer online tools or apps to track your usage over time.
If you don't have a smart meter, manually reading your traditional meter regularly (e.g., weekly or monthly) and noting down the readings can still give you valuable insights. Compare your bills month-on-month and year-on-year to see the savings accumulating. Monitoring helps keep you motivated and allows you to fine-tune your habits for even greater efficiency.
Quick Reference
| Situation | Use this | Why |
|---|---|---|
| Cold air near windows/doors | Apply weatherstripping tape and caulk. | Stops heat escaping through gaps. |
| High heating bills | Lower thermostat by 1°C, bleed radiators, insulate loft. | Reduces boiler workload and heat loss. |
| Lights left on | Replace with LEDs, switch off when leaving rooms. | LEDs use less energy, good habits save electricity. |
| Appliances in standby | Unplug or use switched extension leads. | Eliminates "phantom load" energy waste. |
| Condensation/damp | Open windows briefly, use extractor fans. | Removes moisture without excessive heat loss. |
Common Problems When You Make A Home More Energy Efficient
While striving for energy efficiency is rewarding, you might encounter a few common hurdles. Knowing how to address them can save you time and frustration.
Draughts persist after sealing: Sometimes, hidden gaps like those around floorboards, skirting boards, or even in unused chimneys can still let cold air in. Don't just check windows and doors. Use expanding foam for larger, inaccessible gaps or get a chimney balloon for disused fireplaces. For floorboards, consider a specialist floor insulation product or simply fill noticeable gaps with appropriate fillers.
High bills despite efforts: If your energy usage remains high, it might be due to a misunderstanding of how much energy certain appliances use, or a less obvious heat loss source. Review your energy monitoring data closely. Consider checking your boiler's efficiency or getting a professional energy assessment to identify major overlooked issues, such as poor wall insulation that DIY methods can't address.
Condensation and mould appear: Over-sealing your home without adequate ventilation can trap moisture indoors, leading to damp and mould. If you notice this, it means you need to increase controlled ventilation. Ensure extractor fans are clean and used, and open windows for short bursts more frequently. Never block air bricks or permanent vents for energy saving purposes.
Difficulty with insulation projects: Some insulation tasks, like cavity wall insulation or spray foam, require specialist knowledge and equipment. If you feel uncomfortable tackling a DIY project, especially one involving heights or complex materials, it's always best to consult or hire accredited professionals. Incorrectly installed insulation can be ineffective or even cause issues like damp.
Advanced Tips for Making Your Home More Energy Efficient
Once you’ve tackled the basics, there are more advanced steps you can take to boost your home’s energy performance even further. These often require a larger investment but can offer significant long-term savings.
Upgrade to double or triple glazing: If your windows are old and single-glazed, a significant amount of heat escapes through them. Upgrading to modern double-glazed units, or even triple glazing in very cold areas, dramatically reduces heat loss and noise pollution. This is a considerable investment but offers lasting benefits.
Consider a smart thermostat: Beyond basic programmable thermostats, smart thermostats learn your habits and can be controlled remotely via your phone. Some can even integrate with weather forecasts or sense when you're away from home, optimising heating schedules to prevent waste. This level of control can fine-tune your heating use for maximum efficiency.
Explore renewable energy sources: For those looking for bigger changes, consider installing solar panels (PV) to generate your own electricity, or a solar thermal system to heat your water. Air source or ground source heat pumps can also replace traditional boilers, providing highly efficient heating by extracting heat from the air or ground, even in cold weather. These are major projects but offer independence and significant long-term savings.
Invest in thermal curtains or blinds: While not as impactful as double glazing, heavy, lined curtains or thermal blinds can add an extra layer of insulation at your windows, especially at night. Ensure they fit snugly to the window frame to trap warm air and prevent it from escaping, but open them fully during the day to let in natural light and solar gain.
Assess floor insulation: Many older homes, especially those with suspended timber floors, can lose a lot of heat through the floorboards. Insulating under your floorboards can be a messy but effective job. This often involves lifting floorboards and fitting insulation between the joists, or having professional underfloor insulation installed.
How To Make A Home More Energy Efficient FAQ
Here are answers to some common questions about making your home more energy efficient.
How much can I save by making my home more energy efficient?
The amount you can save varies greatly depending on your starting point, the measures you implement, and your energy usage habits. Simple changes like draught-proofing and lowering your thermostat by 1°C can save hundreds of pounds a year. Larger investments like insulation or double glazing can lead to even bigger savings over time, potentially cutting your bills by 20-30% or more.
Are there any government grants or schemes to help with energy efficiency?
Yes, the UK government often offers various grants and schemes to help homeowners and landlords improve their home's energy efficiency. These can change, so it's always best to check the latest information on the government's official websites (e.g., GOV.UK) or energy charity websites like the Energy Saving Trust. Programs might include support for insulation, heat pumps, or other upgrades.
How often should I get my boiler serviced?
It's recommended to have your boiler serviced annually by a Gas Safe registered engineer. A regular service ensures your boiler is running safely and efficiently, which can prevent breakdowns and keep energy consumption lower. An efficient boiler means less wasted energy and lower heating bills.
Can smart meters help me save energy?
Absolutely. Smart meters provide real-time information on your energy usage via an in-home display. This visibility can empower you to identify energy-hungry appliances and change your habits, often leading to immediate reductions in consumption. Many people find that simply seeing their energy use helps them become more mindful.
Is it worth replacing old appliances with new, energy-efficient ones?
Often, yes. Modern appliances are significantly more energy-efficient than those made even a decade ago. While there's an upfront cost, the savings on your electricity bill over the appliance's lifespan can be substantial, especially for frequently used items like fridges, freezers, washing machines, and tumble dryers. Look for appliances with a high energy efficiency rating (e.g., A or B under the new EU energy label).
Final Checklist for How To Make A Home More Energy Efficient
Use this checklist to ensure you've covered the key steps and are on track to a more energy-efficient home.
- ✓ Have you completed a thorough DIY energy audit of your home?
- ✓ Are all obvious draughts around windows, doors, and other openings sealed?
- ✓ Is your loft insulation at the recommended depth (around 270mm)?
- ✓ Have you considered professional wall insulation if suitable for your home?
- ✓ Is your thermostat set to the lowest comfortable temperature (e.g., 18-21°C)?
- ✓ Have you bled your radiators and ensured furniture isn't blocking them?
- ✓ Is your hot water cylinder well-insulated and set to an efficient temperature (around 60°C)?
- ✓ Have you replaced old light bulbs with energy-efficient LEDs?
- ✓ Do you regularly unplug electronics or switch them off at the wall to prevent phantom load?
- ✓ Are you using your washing machine and dishwasher with full loads and eco-settings?
- ✓ Is your fridge/freezer running efficiently with good seals and regular defrosting?
- ✓ Do you practice controlled ventilation to prevent damp without losing too much heat?
- ✓ Are you monitoring your energy usage regularly with a smart meter or manual readings?
By systematically working through these steps, you'll not only contribute to a greener planet but also enjoy a warmer home and welcome savings on your energy bills.
