Energy saving ideas: 18 ways to make an old home more energy efficient

Looking for energy saving ideas? Cut down your energy bills with these simple solutions for old properties

Energy saving
(Image credit: Contura)

Energy saving in an older home can be challenging, especially if you've just moved into a property that hasn't been updated for a long time. Period properties were not built in an energy efficient way, and their attractive design often goes hand-in-hand with high energy bills. Having said that, there are lots of easy ways to make an old home more energy efficient that don't require a major renovation.

While old, uninsulated solid-wall homes do lose more heat than newly built houses, and outdated, inefficient appliances and fittings use more energy than necessary, it is possible to carry out some simple improvements to make your home warmer and reduce bills.

Looking to take on more projects around your home? Our guide to renovating a house is a good read if you're taking on a larger project.

ways to make an old home more energy efficient: period property with brick and wood panelled sections

(Image credit: Bruce Hemming)

When it comes to making significant changes to an old home, there is much conflicting information around what is the best course of action to take, especially if you're dealing with a listed building or property located in a conservation area – our specialist guides have details on what to do in either of these circumstances. 

The biggest issue is when inappropriate, non-reversible changes are made, or when breathable materials are not specified.

Consider carefully what advice you follow when tackling areas such as heating and insulation, and only work with companies that have experience of dealing with period properties. 

Where possible, repair rather than replace and check with your local authority before introducing any energy-saving measures that may have a physical or visual impact on your property.

1. Switch energy supplier

However old your home is, it is highly likely you're overpaying for your energy simply because you haven't switched suppliers in a while. Sadly, loyalty doesn't really pay off when it comes to staying with the same provider for years – and if you're on a standard tariff with your supplier, you can be sure you're paying too much. Use our energy comparison tool to find a better supplier for your home.

ways to make an old home more energy efficient

(Image credit: Getty Images)

2. Fill gaps between floorboards

Old floorboards add character to a room, yet it’s astounding how much heat can be lost through the gaps between them: added up together it can be the equivalent of a small window being permanently left open. 

While simply laying down a large rug in winter can provide extra insulation, fixing the problem may provide a better solution long term. In fact, The Energy Saving Trust estimates that filling gaps can save up to £40 per room, per year.

For step-by-step instructions, see our guide to how to fix draughty floorboards.

How to make an old home more energy efficient: person fitting Draughtex between gaps in floorboards

(Image credit: Roger Hunt)

3. Swap to LED lighting

Another easy way to make an old home more energy efficient is by updating light fittings and swapping old-fashioned tungsten bulbs for LEDs, which on average last 25,000 hours, can instantly reduce electricity consumption.

While LED lamps can be expensive to buy, savings in electricity bills will usually offset the cost. The lamps now come in all styles, from dimmable spotlights to filament.

how to make an old home more energy efficient: led fairylights in bedroom by lights 4 fun

Find a wide selection of gorgeous, LED fairlights at Lights 4 Fun

(Image credit: Lights 4 Fun)

4. Or even venture into the world of smart lighting

While investing in a smart lighting system means making a slight initial investment, you're sure to make a saving – both cost and energy wise – in the long term. Particularly if you're switching over directly from incandescent light bulbs to low energy halogen bulbs or simply investing in smart plugs in order to control and monitor your plug-in appliances' energy usage.

In addition to their energy saving properties, smart lighting buys are also handy in helping users streamline their lighting system thanks to the option to control all the lights in your home from your smart phone.

If you're interested in learning more about the smart lighting, have a read of our guide to the best smart lighting gadgets to light your home. Convinced? The Philips Hue Starter Kit is the best place to get started. You'll find the best deals, currently available, in our price comparison chart below.

5. Review your current heating system

An annual service is important to ensure your boiler is working as well as it should, but if it’s more than 10 years old you should consider replacing it with a highly efficient condensing model, which can save you up to £305 per year.

If your radiators aren’t working effectively, check to see if they are colder at the top than at the bottom, as this means there could be trapped air in the system. Bleeding them to solve the problem is a straightforward task that can be done on a DIY basis.

If, however, the top of the radiator is hot and the bottom cold, or generally they aren’t that warm, then there is probably sludge in the system that needs flushing out – a process that usually costs around £500.

For more advice on heating your home as efficiently as possible, browse our guide to  how to heat your home, which covers everything from central heating and radiators, to stoves, underfloor heating and more.

How to make an old home more energy efficient: Metallic finish radiator in hallway

(Image credit: The Radiator Company)

6. Draught-proof doors and windows

Narrow gaps around windows and doors can create uncomfortable draughts as well as rattling noises. Avoid using silicone sealants to fill gaps and instead use draught strips, which can be removed in the future if required. Also look at non-obtrusive solutions for letterboxes and keyholes, and draught excluders.

Sash windows can also be an issue due to the necessary gap around the sliding mechanism, but specialist companies such as Ventrolla and The Sash Window Workshop can add discreet draught-proofing. Find out how to restore and maintain your timber windows; use our guide to maintaining and repairing metal framed windows, too.

Alternatively, consider replacing period doors and windows with authentic designs – our guide to how to choose windows for period homes provides plenty of inspiration.

how to make an old home more energy efficient: contemporary dark blue draught excluder from garden trading

(Image credit: Garden Trading)

7. Insulate the loft

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Around a quarter of a home’s heat is lost through an uninsulated roof space, but this is fairly easy to improve with adequate insulation. 

The most widely used material is mineral wool (around 27cm to 30cm deep) as, at around £20 per roll, it is very cost-effective. Although unpleasant to fit, requiring the use of protective clothing, mineral wool has good fire resistance and sound-insulation qualities. 

Natural materials, such as sheep’s wool quilt or loose cellulose (made from recycled newspaper) are nicer to work with and well suited for use in older houses, but also consider a breathable spray foam insulation such as Icynene.

Our essential guide to roof insulation explains everything you'll need to know when insulating a loft in order to make an old home more energy efficient. 

how to make an old home more energy efficient: loft insulation roll

8. Add smart heating controls

Don't skip over this one, technophobes, as smart thermostats can help you save an unbelievable amount of energy – and money – on an annual basis. If there's one form of smart technology worth investing in, we promise it's this one. 

With the top models capable of learning your heating behaviours – and consequently how best to streamline them – it's perfect for shaving the pounds off your energy bill. What's more, you'll be able to see your saving thanks to monthly reports.

Use our guide to smart thermostats to find out how you could benefit from having one, and find the best smart thermostats in our buyer's guide.

How to make an old home more energy efficient: Google Nest Thermostat E

(Image credit: Google)

9. Fit secondary glazing

Not only can original window frames be the cause of draughts, but the glazing is often very thin, creating a cold internal surface. 

As a result, these architectural antiques tend to be replaced for modern double-glazed designs. It's worth remembering, however, that as long as the windows are repairable, it is possible to look at fitting secondary glazing.

High-quality aluminium systems can be colour-matched to the windows, while magnetic systems can be lifted out in the summer. Secondary glazing also cuts down on road noise, and the panels are usually very discreet and can be opened when needed.

Want more information on how to install secondary glazing? You'll find everything you need to know over in our specialist feature. 

How to make an old home more energy efficieny: blue door in hallway with unique window and flowers

(Image credit: Philip Lauterbach)

10. Invest in green energy

The most popular renewable energy sources for period properties are solar and wind, but drawing energy from the ground and air are also possibilities.

While renewables can give considerable savings on your bills, they can also have a negative impact on your home’s appearance, so make sure you have all the facts before investing.

If you're not able to generate your own renewable energy, it's now quite easy to switch to a renewable energy supplier without needing to install anything in your own home. Find the best green energy supplier for your home in our buyer's guide. 

how to make an old home more energy efficient: solar panels on building roof

(Image credit: Jody Stewart)

11. Install an energy-efficient stove

Unlike open fires, which lose most of their heat straight up the chimney, wood-burning stoves are sealed to the room. This means they use less fuel and radiate the heat throughout the room, making them a perfect solution if you're looking for ways to make an old home more energy efficient

Browse our essential guide to choosing a stove if you need more help choosing the best model for your home. 

How to make an old home more energy efficient: renovated french home firepalce

(Image credit: Ton Bouwer)

12. Block the chimney

It has been calculated that over four per cent of a home’s heat is lost straight up an open chimney, but this can be easily solved by inserting a device that blocks the draught, such as the Chimney Sheep.

Made of a thick layer of felt, it can be inserted up the chimney when the fireplace isn’t in use and simply removed when you want to light a fire. If the fireplace is never used, you could opt for a chimney balloon instead.

How to make an old home more energy efficient: arts and crafts house with fireplace and bookshelf

(Image credit: Little Greene)

13. Insulate the walls

It is estimated that 35 per cent of an uninsulated building’s heat can be lost through the walls, but this is disruptive to address.

Homes built before 1920 had solid walls, as opposed to including a cavity that can be filled with insulation. 

Solid walls can be insulated either internally or externally – but both solutions involve covering the existing wall finish, which can mean the loss of period features. 

For internal walls, rigid insulation boards can be applied, or a stud wall constructed and filled with soft insulation. Plaster is then applied over the top. This inevitably affects existing skirting and cornicing. The cost of internal wall insulation is around £40 to £50 per m2.

To insulate external walls, a layer of insulation is applied and covered with lime render or other cladding. This can totally change the look of a house and affect elements such as overhangs, windowsills and door openings, so is not suitable for the beautiful façades of many period homes. 

The cost for adding external wall insulation to an average three bedroom semi would be from £5,000 to £9,000.

Find out more about insulating your home in our guide. 

How to make an old home more energy efficient: exposed brick wall painted in Farrow and Ball

(Image credit: Farrow and Ball)

14. Then insulate the floors, too

Around 10 per cent of a property’s heat is lost through floors, so insulating them should make a big difference if you're looking for ways to make an old home more energy efficient.

 There are two types of floor: solid or suspended timber. Solid floors are in direct contact with the ground, so without lifting them it is difficult to add insulation, but topping them with breathable, natural carpets, such as coir, will help. Avoid rubber-backed designs. 

If the original floor has previously been replaced with concrete and includes a damp-proof membrane, then laying a floating wood floor on top can improve thermal performance. 

If there are damp problems with a concrete floor, consider replacing it with limecrete, made of breathable lime and aggregate. 

Suspended floors are straightforward to insulate where there is access from below, such as a cellar. Quilt-type insulation can be fitted between the joists, supported with netting. Insulating from above involves lifting floorboards, so think twice if the floor is of historical value. 

If you do disturb the boards, lift a small number at a time. A variety of soft insulating materials can be used, supported by nets, or rigid materials can rest on timber battens.

For guidance as to how to insulate floors in old homes, take a look at our specialist guide.

How to make an old home more energy efficient: original inspired victorian tiles from original style

(Image credit: Original Style)

15. Reflect heat from radiators

Fit enhancers behind your radiators to reflect heat back into the room. In addition to preventing heat loss through the walls, this can save as much as seven per cent on heating bills. It should cost less than £10 per radiator to install.

How to make an old home more energy efficient: Princess aged gold vintage radiator

(Image credit: Castrads)

16. Add a curtain lining

Thermally lining your curtains can reduce heat loss by up to 14 per cent. Single glazing has a U-value of 5.5W/m2, but this can be brought down to 1.0W/m2 with thermally lined curtains. It will cost from around £20 per curtain.

How ot make an old home more energy efficient: living room with velvet sofa and green curtain window detail

(Image credit: Fiona Walker Arnott)

17. Improve insulation to sloping ceilings

If your first floor (or second floor in a three-storey house) rooms have a sloping part, this is often because plasterboard has been fitted to allow cold air to circulate above and ventilate the rafters.

This can lead to phenomenal heat loss if not insulated properly, so fit insulation boards and re-plaster. This can be expensive but makes a big difference to the warmth and thus comfort of a room. The cost would be from £12/m2 including labour.

(Image credit: Chris Snook)

18. Get freestanding electric stoves for smaller rooms

Particularly in larger period properties, heating the whole house when you're using only one room – say a home office – for the majority of the day is not energy efficient. To keep room warm while you're working from home, consider getting a freestanding infrared heater: the advantage of these heaters is that, unlike convector heaters, they heat your body rather than the air around them. Alternatively, consider a freestanding  electric fan heater: there are plenty of gorgeous models on the market that look like traditional fireplaces and stoves – perfect for an old home. 

Freestanding Electric Wood Burning Flame Effect Fireplace by Trueshopping

(Image credit: Amazon)

Find out more on saving energy and reducing the cost of bills:

Melanie Griffiths
Melanie Griffiths

Melanie has been working in homes magazines for almost 14 years and is currently Editor of Period Living magazine. She lives the brand's ethos of creating a forever home in an old house with new ideas as she slowly improves her own rural home. When she isn't at work, Mel enjoys cooking, caring for her garden and exploring the countryside.