Loft Insulation Cost in the UK (2025): A Simple Guide for Homeowners

If you choose to install the insulation yourself, materials usually cost £10–£15 per square metre. Professional labour typically starts at £250 per day, but costs may be higher in areas like London and the South East due to increased rates.

Want to avoid the expense altogether? You could be eligible for free loft insulation through government schemes. Apply now and let us handle the rest.

Types of Loft Insulation and What They Cost

There are various types of loft insulation, each suited to different property types, loft layouts, and budgets.

Blanket insulation, made from mineral wool or fibreglass, is the most popular option. It comes in rolls, is easy to install, and costs between £10 and £15 per square metre. It is ideal for standard, open loft spaces and works well for DIY installations.

Loose-fill insulation uses lightweight materials such as cellulose or mineral wool and is suitable for topping up existing insulation or insulating irregular loft shapes. While DIY-friendly, it requires care to apply evenly.

Sheet insulation (PIR boards) is a rigid foam panel used mostly in loft conversions or usable rooms. This premium option typically costs between £35 and £45 per square metre and generally requires professional fitting due to its precision and installation requirements.

Spray foam insulation is applied as a liquid that expands to fill gaps and seal hard-to-reach areas. It offers excellent thermal performance but is one of the most expensive solutions, ranging from £37 to £55 per square metre. This type must be installed by a qualified professional.

Multifoil insulation is a thin, reflective material composed of several layers. It is used in tight spaces or as an additional layer to boost insulation levels. While not always a standalone solution, it can be effective in specific applications.

Selecting the right insulation depends on your home’s structure and whether you want a do-it-yourself or professionally installed solution. If in doubt, our team can help assess what suits your property best.

DIY or Professional Installation: Which Is Right for You?

DIY insulation can be a cost-effective choice for homes with easy loft access and minimal obstructions. If your loft is clear and straightforward to work in, installing blanket insulation yourself may be a good option.

However, most homeowners benefit more from professional installation. Experts ensure the insulation is installed correctly, to the recommended 270mm depth, and in accordance with government energy standards. Professional installation is also essential if you wish to qualify for a government grant and often includes a workmanship guarantee for peace of mind.

If you’re unsure which path to take, our advisors are here to help. Book a free home survey and get personalised advice from our team.

How Much Can You Save by Insulating Your Loft?

Loft insulation delivers both immediate and long-term savings. Depending on your property, you can save between £250 and £445 per year on heating bills. Over time, these savings typically recover the cost of installation within two to four years.

If you are eligible for a government-funded grant, you won’t pay anything upfront, and the savings begin immediately.

In addition to the financial benefits, loft insulation also supports the environment. A well-insulated home can reduce carbon emissions by up to one tonne per year, making it a smart choice for homeowners looking to live more sustainably.

Can You Get Free Loft Insulation in 2025?

Yes, thousands of UK households qualify for free loft insulation through government-supported energy schemes designed to combat fuel poverty and reduce emissions.

Available Programmes Include:

• The ECO4 Scheme for low-income and vulnerable households
• The Great British Insulation Scheme (GBIS) for properties with poor EPC ratings
• Local authority Warm Homes Local  Grants distributed by councils

You may be eligible if your household income is below £31,000 per year, you receive benefits such as Universal Credit or Pension Credit, or your property has an EPC rating of D or lower.

Applying is simple. Just fill in our short form to check your eligibility. If you qualify, we will arrange a free home survey and a certified installer will carry out the work without any cost to you.

Don’t miss out. Apply for free loft insulation today

What Happens During Installation?

Once your application is approved, one of our qualified surveyors will visit your property to inspect your loft space. They will measure the area, assess ventilation, and check for any existing insulation that needs replacing.

The team will then remove any old materials and install new insulation to the recommended thickness. If you use your loft for storage, we can install raised boarding above the insulation to keep it functional.

Most installations are completed in one day or less, ensuring minimal disruption to your household.

Are There Any Extra Costs?

While your insulation may be fully funded by a grant, some homeowners choose optional extras to improve the usability of their loft.

Here are the average costs for additional services:

• Loft boarding: £55 per square metre
• Pipe insulation: £6 to £35 per metre
• Tank insulation: £20 to £50
• Electrical adjustments: £300 to £500

These upgrades are not mandatory but may be useful if your loft is used regularly or includes pipes and wiring that need protection.

Ready to Save Money and Improve Your Home?

Loft insulation is one of the most effective ways to lower your energy bills and improve comfort. With government grants available in 2025, many households can get this upgrade at absolutely no cost.

Enjoy a warmer home, lower bills, and long-term savings; all without paying upfront.

Apply now with FreeInsulation.co.uk and start benefiting today. Check your eligibility now