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L'înformâtion et les sèrvices publyis pouor I'Île dé Jèrri

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Energy saving advice

​​Improve your home

There are lots of ways to make your home more energy efficient, and when you save energy you save money. Below are just a few suggestions that could help you to reduce your energy bills.

Improving your home's insulation will make you feel warmer during winter and cooler in the summer. This may even mean you're able to turn down your heating, which will save you money on your fuel bills.

Some building changes might need planning or building permission. Email Planning and Building Services to find out more.

Draught proofing

Draughts in your home let cold air in from outside and warm air out, this can make your home feel cold. Filling or blocking these gaps is one of the easiest and cheapest ways to save energy, and pays for itself within a couple of years. Draught proofing can be really simple, for example placing a draught excluder behind a door to prevent cold air coming in. You can draught proof the following:

  • windows
  • external doors
  • keyholes
  • loft hatches
  • floorboards and skirting boards
  • chimneys
  • letterboxes

Draught proofing is an ideal DIY project or can be installed by a professional.

It is still important to ventilate your home to help avoid condensation and damp i.e. in areas with open fires or where a lot of moisture is produced such as bathrooms and utility rooms.

Loft insulation

  • a quarter of your home's heat is lost through the roof
  • loft insulation can save you up to £470 each year from your energy bills, depending on your property and fuel type
  • it is effective for about 40 years and will pay for itself over and over again

The recommended depth of loft insulation is 270mm or 11 inches. If you have less than the recommended depth then topping up or laying new insulation will trap the heat in your home more efficiently.

Wall insulation

Wall insulation acts as a giant tea-cosy around your home. It can save you hundreds of pounds each year on your heating bills. An uninsulated house will lose about a third of its heat through external walls. 

There are three main types of wall insulation:

  • cavity
  • internal
  • external

Cavity wall insulation

Cavity wall insulation is where insulation material is pumped into the gap inside your exterior walls from the outside. If your home was built between 1940 and 1980 it is likely to have a cavity that can be filled. This work should be carried out by a CIGA certified installer.

Internal wall insulation

Insulation material is attached to the inside of exterior walls. This is done using either insulation boards or by building a stud wall that is filled with insulation. This could be a DIY project or can be installed by a professional.

External wall insulation

Insulation material is fixed to the outside of your home. It is then covered with a special render or cladding. It can be finished to look however you like from smooth to brick effect. If you are looking to have external wall insulation you must contact Building Control. You might also need to contact Planning to find out if you need planning permission.

Heating systems

Heating your home and hot water accounts for around 60% of your yearly energy bills. Having an efficient heating system can make a big difference.  

  • if you have an oil or gas boiler which is over 12 years old, replacing it with a new A-rated condensing boiler could save you up to £585 per year

  •  if you have electric heating which is over 10 years old replacing it with a more modern unit might save you money

  • putting an insulation jacket on your hot water tank could save you up to £255 per year, depending on your property and fuel type

If you do look to replace your existing boiler, it's worth asking your installer to check if it is the correct size for your property - remember a smaller boiler will cost you less to buy and to run.

Make sure your heating is coming on when you want it to and for the right length of time. Having better control over when you're heating your home could help save money on your fuel bills.

Energy advice booklet

For more energy saving tips and advice, look through our simple step-by-step guide.
Energy efficiency advice booklet

Energy advice

Energy advice is available to all Jersey Residents. Email us with your queries

We are able to answer phone calls during normal office hours. An answerphone is available after hours and a member of staff will call you back.

Call: +44 (0) 1534 441611

We have been trained by the Energy Saving Trust (EST) to make sure we give you the most up to date and accurate energy saving advice. All information contained in our booklets is checked by the EST before publication. Further information about the above energy saving measures can be found on Energy Saving Trust (UK) website

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