Lag your loft

Insulate to the max

When your home has the recommended 270mm of loft insulation you will be warmer in the winter, cooler in the summer and saving up to £215, as well as 950kg of CO2 a year.1

Installing (or topping up your existing) loft insulation is the single most effective measure for improving the energy efficiency of your home - 1/4 of all heat is lost through the roof if it's not insulated. So what are you waiting for?


Here are a few reasons to take action.

Click for more info or scroll to read them all.


Snug as a pug in a rug? That's how your house will feel after wrapping it in a nice thick layer of insulation.

Thermal loft insulation reduces heat loss (and heat gain) by providing a barrier between the inside and outside of your home. It helps to reduce the amount of heat that escapes from it in the winter and protects it from getting too warm in the summer.


of heating energy disappears through the roof of an uninsulated house.


You will be saving in the region of a whopping 720kg of CO2 a year every year when you insulate your loft.

If everyone in the UK installed the recommended 270mm loft insulation, we could save nearly £500 million – and 2.7 million tonnes of carbon dioxide every year, the equivalent of taking nearly 100,000 cars off the road.1


Your loft insulation could pay for itself within a couple years and will continue to save you energy for more than forty years.

The Energy Saving Trust estimates that insulating your loft will cost between £50 and £350 and save you about £175 a year on your energy bills.1

Global Goals

In September 2017, an historic agreement was signed by UN member nations agreeing to work towards 17 Global Goals for Sustainable Development by 2030, otherwise known as the SDGs.

Achieving these ambitious goals will require action from governments, businesses, NGOs, and individuals alike. We can - and must - all play our part.

By making the 'Lag your loft' pledge, you are contributing in your own small way to the following SDG targets:

7.3: By 2030, double the global rate of improvement in energy efficiency

12.8: By 2030, ensure that people everywhere have the relevant information and awareness for sustainable development and lifestyles in harmony with nature

13.3: Improve education, awareness-raising and human and institutional capacity on climate change mitigation, adaptation, impact reduction and early warning


There are two routes to getting your loft well insulated: You can do it yourself or you can get a specialist installer to do it for you.


For many lofts or 'rooms in the roof', you can install your own insulation within in a day, no matter how experienced or otherwise you are at DIY.

It is important to go for an approved material, one that has been properly tested to ensure it is safe to use in your loft. Look out for Energy Savings Trust recommended products.

Watch this handy video from Wickes about how to install your own insulation, or read B&Q's comprehensive advice on how to get cracking.

Bring in the professionals:

If your loft is damp, your roof is flat, or it's just not easy to access, you're definitely best to bring hte professionals in.

There are a lot of professional energy efficiency advisers and installers for you to choose from, go to the National Insulation Association website to find a registered installer in your area.


And before you make any decisions, why not have a quick word with your energy supplier or local authority to find out what deals are available locally. The energy companies have carbon emission targets they have to meet and as a result they may be subsidising or even giving away loft insulation.

Success Stories


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I have mostly lagged my loft. I have a small part left to do which I am hoping to get done at some point soon. I have a room in roof which means putting up insulating plasterboard rather than the traditional foam insulation, but when put up, should help in the winter months.

Insulation is now finished, no more required. :)

Another pledge for my mother, I did it to reduce her heating bills

Loft converted and fully insulated to latest building regulations.

Loft totally insulated and centre portion also fitted with loft boards.

Only got 100mm under loft floorboards, but also got thermal lining for the ceiling. Now it's toasty warm!