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The benefits of insulating your loft

Find out what the benefits of loft insulation are, the best ways to insulate your loft and how to find the right tradesperson to insulate your loft.

With so much going on in the home, jobs such as installing loft insulation often get neglected. This can have a massive impact on your energy usage and heating bills.

When outside temperatures plummet, the key to a cosy home is making sure you have the right insulation, especially in your loft.

In this guide, we cover the benefits of loft insulation, the best ways to insulate your loft and how to find the right tradesperson to insulate your loft.

The benefits of loft insulation

Energy efficiency

For the more green-minded of us, the cost of loft insulation reduces the cost of our carbon footprint. By reducing our energy consumption, we help promote a greener world.

Heat retention

Better insulation equals better heat retention. Not only does this keep your home cosy and reduce the risk of damp or mould, it means you’re using less energy to keep warm on those chilly nights.

Reduction in bills

The main benefit of loft or attic insulation is the cost savings. Less energy and greater heat retention = lower bills. It’s a win-win

While loft insulation is an extra expense you may not have budgeted for, it’s well worth the investment. You will can likely see a reduction in energy usage that’ll continue for the life of your new insulation.

In fact, you could see savings of up to £315 a year, according to the Energy Saving Trust.

Other benefits include:

  • An increase in the value of your home
  • Making your home more environmentally friendly
  • Reduced noise pollution inside your property
  • A cleaner roof without a gang of pigeons making themselves at home

Best loft insulation materials and types

You can have a range of insulation types in your loft. An insulation specialist will be able to tell you which is best for your loft.

The most common methods of loft insulation include:

Different types of loft insulation

Blanket loft insulation

Blanket insulation is sold by the roll. It’s easy to install and comes in various materials such as fibreglass, mineral fibre and sheep’s wool.

The main downsides include the higher price for sheep’s wool and the potential issues with installing it – mainly due to its bulk and the fact it doesn’t neatly fit in small spaces or around obstacles.

Loose-fill loft insulation

Loose-fill insulation is often made from materials such as cork granules, mineral wool and cellulose fibre. Popular due to the availability of greener alternatives, loose-fill insulation is great for ensuring an entire area is covered.

That said, it needs to be installed with safety equipment to avoid skin irritation or breathing in harmful fibres. It can also come loose in more draughty lofts.

Sheet loft insulation

Used on the sloping sides of roofs, sheet insulation is a greener option that is perfect for loft conversions and covering plasterboards. It’s also highly insulating and often comes with its own attachment system.

Some downsides include higher production costs and the overall expense.

Spray foam insulation

Also known as ‘blown-fibre insulation,’ installing spray foam requires a professional tradesperson. On the plus side, it’s quick to install and light to handle and cut, making it ideal for difficult-to-reach areas.

That said, it’s the priciest option and less suitable for draughty lofts.

However, please be aware that some mortgage lenders will not lend for a house with spray foam insulation. This is because spray foam insulation can restrict the air circulation in the loft, which can potentially lead to condensation and roof supports weakening or rotting.

We recommend speaking to a mortgage broker for advice.

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How to insulate a loft

Knowing how to insulate a loft can be a great skill to have and if the job is done well you won’t need to worry about adding more insulation for decades. There are several stages to loft insulation including preparation, gathering tools and materials, and installing the insulation itself.

If this sounds like the right project for you, our how to insulate a loft guide covers everything you need to know.

How to maximise the effectiveness of your loft insulation

Insulating your loft isn’t a job suited to everyone and if you aren’t a confident DIYer, we’d recommend hiring an expert.

Professional insulation fitting will ensure your loft is effectively insulated and stays energy-efficient for years to come.

Concerned about hiring a stranger to work in your home?

No problem, our members are thoroughly checked to ensure whoever you hire is trustworthy and committed to giving you excellent service time after time.

We’ve also introduced a guarantee where you could be covered up to £1,000 in the unlikely event something goes wrong with your job (T&Cs apply).

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How much does it cost to install loft insulation by a professional?

For worry-free installation of your loft insulation, it’s well worth considering hiring a professional. So, exactly how much will this cost you?

The average price for basic blanket insulation is £500 but this will vary depending on the size of your home and whether you need the old insulation to be removed.

Check out our loft insulation cost guide for more details.


benefits of loft insulationHow thick should loft insulation be?

When deciding what thickness of loft insulation you need, consider that the current EEC programme suggests a minimum depth of 270mm.

How much loft insulation do I need?

Firstly, you’ll need to carefully measure the space, making you don’t step between your loft joists. You can then reduce your final measurements by 10% to account for the joists themselves.

What is the best loft insulation?

You’ll need to consider your loft itself before deciding what the best insulation material will be. For example, blanket insulation is easy to install but can be difficult to fit around obstructions. Alternatively, blown-fibre insulation is great for hard to access areas but can be costly.

More details on the different options can be found in our loft insulation cost guide.

How long does loft insulation last?

This depends on a range of different factors, but most insulation can last up to 80 years. However, your insulation will last less time if there are any leaks in your loft, if it’s installed incorrectly, if there are rodents living in your loft or there is any mould build-up.

Which tradesperson should I use for the job?

For long-lasting, highly efficient loft insulation, we’d recommend hiring an insulation specialist.

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