Free home insulation

Is your home one of the millions that could get free cavity wall and loft insulation from British Gas?[1]

What is insulation?

Insulation helps stop heat escaping from the loft and walls of your home.

You spend less warming your house up when you keep the heat in, so a well-insulated home can really lower your bills.

Why is it free?

As part of a government initiative we’re helping make homes more energy efficient – so they use less, waste less and spend less. It's all part of a scheme called the Energy Companies Obligation (ECO).

As part of that, we’re offering free insulation to homes across the country. You don’t have to be a British Gas customer and you don’t need to buy anything from us. You can get free insulation even if you’re renting. Just ask your landlord first.

Why British Gas?

We've already installed free insulation in over 2 million homes over the last 5 years, so we’ve got plenty of experience.

  • All the work is carried out by qualified installers we’ve approved.
  • You don't have to be a British Gas customer already or buy anything from us.
  • You don't need to be on benefits or live in a certain area.
  • We’ll install everything and tidy up after.

How much could I save a year?

Cavity wall insulation

Annual saving

Detached

£275

Semi-detached

£160

Mid-terrace

£105

Bungalow

£110

Loft insulation (0-270mm)

Annual saving

Detached

£240

Semi-detached

£140

Mid-terrace

£135

Bungalow

£200

This is what the Energy Saving Trust estimate. You can find out more at energysavingtrust.org.uk

Little extras that can make a difference

If your home is eligible for free loft or cavity wall insulation, our engineer can fit a few extras while they’re there. If you need it, we can:

  • Insulate any hot water cylinder without a factory fitted jacket.
  • Draft proof the loft hatch.
  • Insulate any cold water tanks in the loft.
  • Insulate the pipework in your loft.

Loft insulation

Loft insulation is a thick material that’s rolled onto the floor of your loft. It acts like a blanket, helping to stop heat escaping through the roof.

  • You could save up to £140 a year on energy. [2]
  • You could see the difference in your bills straightaway.
  • It takes less than a day to install.

Do you need loft insulation?

If your home was built from 1st January 1991, you won't need loft insulation.

Loft rafters without insulation

Yes

If your loft looks like this, it’s not insulated yet – we could help.

Loft rafters with insulation

Maybe

If you can see your beams, your home might benefit from more insulation.

Cavity wall insulation

Cavity wall insulation fills the gap between your inside and outside walls. It helps stop heat escaping through the walls of your home.

  • You could save up to £160 a year on energy.[2]
  • You could see the difference in your bills straightaway.
  • It takes less than a day to install.

Do you need cavity wall insulation?

If your home was built after 1983 you won't need cavity wall insulation.

(if your home has solid walls, you may need solid wall insulation instead.)

Brick wall without insulation

Yes

If your walls looks like this, we might be able to insulate them.

Brick wall with insulation

No

If your walls look like this, they're already well insulated. 

Insulation for tenants

Your home could still benefit from free insulation, if you privately rent your home.

We're here to help

Frequently asked questions

Q. I already have some loft insulation – do I need more?

A: You might need your loft topped up, if you can see the beams between the insulation. It's worth checking you have the right amount.

Q. Will I notice the difference once my home has been insulated?

A: Yes, you could notice the difference straightaway. Your home will be warmer in the winter and cooler in the summer.

Q. If I don't own my home, can I still install insulation?

A: Yes, so long as you get permission in writing from your landlord. You'll need to do this before we carry out the survey.

[1] There are a few areas of the country we can’t reach, to check if you live in one of them just give us a call. We’ll cover the cost of the insulation itself but if your house needs more vents than usual, or we need to use scaffolding, you may need to help with the cost. But don’t worry, we’ll tell you in advance if this applies to your home.

[2] Our sources are: http://www.energysavingtrust.org.uk/domestic/roof-and-loft and www.energysavingtrust.org.uk/domestic/cavity-wall. The amount you’ll actually save depends on your individual circumstances.