Find out how much loft insulation costs

For a cost-effective way of keeping your house warm you should seriously consider lost insulation – find out how much it costs to install here.

loft insulation cost

Loft insulation can cut your fuel bills


Why should I insulate my loft?

Mainly because it will save you money and energy, a wellinsulated house keeps the warmth indoors where it is needed, and in turnrequires less energy. Insulatingyour loft will heat your house more effectively; using less carbon dioxideand saving you money.

Howdoes loft insulation work?

Heat naturally flows from a warm area toa cold one, so the colder it is outside the faster heat from your home willescape into the cooler outside air. However, imagine a barrier which traps theescaping heat and there you have insulation. Insulation also has lots of littleair pockets built into it, which trap the heat and keep it indoors, this cutswhat is known as the U-Value of the loft. The U-Value determines how quicklyyour home loses heat, so the lower the U-Value, the less energy you need tokeep your house heated. Loftinsulation will reduce you loft’s U-Value from around 2.3 – 0.16 W/m2K, ormore simply, a reduction of about 95%. When researching loft insulation you mayalso come across an R-Value, this is a measure of thermal resistance and is theinverse of a U-Value. So, the higher the R-Value the better. The R-Value isnormally noted on the packaging of insulation, so consider that beforepurchasing.

How much will loft insulation cost and what will I save?

The following costs are based on a gas heatedthree-bedroom semi detached house that has gone from no loft insulation to270mm loft insulation. These costs are only approximate, for more specificquotes contact companies in your local area.

Annual Saving: £150
Installed Cost: £250
DIY Cost: £50 – £350
Annual CO2 Saving: 730kg

So, if you installloft insulation your ‘payback’ time would be around two years and DIYpayback could be up to three years. Bear in mind that loft insulation iseffective for around 40 years, so it will pay for itself and save you a lot ofmoney. Think of it this way, the better insulated your home, the less energy isrequired to keep it heated which means you will save money on energy bills.

Willloft insulation work in my home?

As long as you have a loft that is accessible and free ofdamp/condensation problems. Even if your loft is hard to access do not ruleloft insulation out, blown insulation can be used (although this must be doneby an installer).

The Energy Saving Trust

An interesting fact that the Energy Saving Trust havefound out is that if everyone in the UK installed 270mm of loftinsulation, collectively we could save around £520 million and nearly 3million tonnes of CO2 every year. That’s enough to fill Wembley Stadium nearly380 times over!

How do you insulate a loft?

Insulating a loft with insulation blankets can be a relatively easy job, however it must complete to a very high standard to make it worth your while and avoid unnecessary wastage. It is advisable to hire an installer to get the best job done. Also if you have a hard to reach loft you will need to use blown insulation which must be installed by a professional insulation installer. This process should only take a few hours; the installer will use specialist equipment to blow loose insulation material into the loft.

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