How much does loft insulation cost?

Loft insulation full cost guide

This guide goes through everything you need to know about loft insulation costs. From how much it will cost you to hire a professional, to the different types of installation and prices available.

In this cost guide we will talk about:

1. Why should I insulate my loft?
2. Loft insulation average cost
3. Cost of hiring a professional for loft insulation
4. Different types of loft insulation and prices
5. Avoid these additional loft insulation costs
6. Can loft insulation save money in the long run?
7. Find loft insulation services on MyBuilder
8. FAQ: Common questions about loft insulation costs

Why should I insulate my loft?

Loft insulation helps keep your home warm in the winter and cool in the summer, which can lead to substantial energy savings and a reduced carbon footprint.

It can even improve your home's Energy Performance Certificate (EPC) rating, and save up to £380 annually on energy bills.

Before starting a loft insulation project, inspect your loft space thoroughly for dampness, mould, or structural problems that could reduce insulation performance and lead to bigger issues later.

If you suspect any moisture problems, check our damp survey cost guide to understand what to expect before proceeding.

Loft insulation average cost

The average cost of loft insulation typically ranges from £300 to £500 for DIY projects, while professional installations might range from £500 to £1,200.

There’s a few things you need to think about when it comes to the insulation price for your specific loft:

• The size of the area needing insulation: Larger spaces require more materials, increasing the cost.

• The complexity of the job: Complicated layouts or hard-to-reach spaces can increase labour costs.

• The materials used: Different types of insulation materials vary in cost, with some being significantly more expensive than others.

• Location: Labour costs can vary depending on where you live, with urban areas often costing more.

• Existing loft conditions: If repairs or preparations are needed before insulation, costs will increase.

Cost of hiring a professional for loft insulation

You can generally expect to pay around £250 per day for loft insulation labour. That’s the cost just for installing insulation.

If you need additional work like boarding or rerouting wires, you will probably need to pay more.

Check out our article to find out how to find the best insulation installer near you.

Or, post your job on MyBuilder today. It’s the quick and easy way to find loft insulation installers near you, ask questions, request quotes and check their customer reviews.

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Different types of loft insulation and prices

There are a few different options when it comes to insulating your loft. Some are more cheap than others, whereas some are seen as more efficient.

Here’s a quick look at the different types of loft insulation available:

Type of Insulation	Cost
Blanket (Mineral Wool)	£5 – £10 per m²
Loose-Fill	£8 – £12 per m²
Sheet (PIR Boards)	£30 – £35 per m²
Spray Foam	£35 – £50 per m²
Thermal Foil Layer	£14 per m²

Is blanket insulation a good option?

Blanket insulation, primarily made of mineral wool, is a popular choice for homeowners due to its versatility and ease of installation.

Typically rolled out between loft joists, it's especially effective for large area coverage.

This type of insulation generally costs £5 to £10 per m², making it a cost-effective solution for many households.

Blanket insulation is also known for being fire-resistant and reducing noise pollution, contributing to a more comfortable living environment. Thinking of insulating your roof as well as your loft? Visit our price guide for all roof insulation costs.

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Avoid these additional loft insulation costs

When you are planning to insulate your loft, there are some hidden costs which could come up during the installation process.

Know about these beforehand to avoid surprises:

• Pipe insulation: Insulating pipes prevents them from freezing in cold weather, safeguarding your plumbing system. The cost usually is about £6 per metre and is a worthwhile investment to avoid potential damages.

• Loft boarding: If you plan to use the loft for storage, installing loft boards is necessary. This can add an extra £55 per m² to your budget, providing a secure and useful storage space.

• Water cistern insulation: To prevent heat loss from water tanks, insulating the water cistern is crucial. This process typically costs around £150 and contributes significantly to energy efficiency.

• Electrical work: Rerouting electrical wires in the loft can be necessary, especially if extensive work is required. Hiring an electrician for this task can cost approximately £250 per day.

If you want to get a quote upfront with any of these costs included, you can talk to insulation professionals near you on MyBuilder. Just post your job, and services near you can get in touch.

Can loft insulation save money in the long run?

When considering the potential savings, it's important to note that the impact on energy bills can be substantial.

• A detached house could see an annual energy saving of up to £380, depending on the type and thickness of the insulation.
• A semi-detached house might save around £230 annually
• A mid-terrace house could see savings of approximately £200.

Find loft insulation services on MyBuilder

With MyBuilder, you can easily talk with insulation companies that have been verified with checks like ID verification before being added to our directory.

You can also browse all the profiles in our directory, read customer reviews and see images of previous insulation jobs. Hire with confidence, with MyBuilder.

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FAQ: Common questions about loft insulation costs

How does the process of installing loft insulation work, and is it something that can be DIY or better left to professionals?

Loft insulation involves laying materials like glass wool, mineral wool or foam boards to reduce heat loss. The process includes clearing the space, measuring, and fitting insulation between joists. While DIY is possible for simpler types like rolls, awkward layouts or obstructions make professional installation a better choice, especially for loose-fill or spray foam, ensuring efficiency and long-term savings.

How long does loft insulation typically last before needing an upgrade or replacement?

Loft insulation can last over 40 years if properly installed and kept dry. However, moisture, pests, or compression can reduce its effectiveness. Regular checks - especially after extreme weather or rising energy bills - can help identify when a top-up or upgrade is needed.

What common challenges might I encounter when planning to insulate my attic, and how can they be addressed?

Common attic insulation challenges include tight access, existing wiring or plumbing and poor ventilation. Professionals can navigate restricted spaces safely. For wiring or pipes, avoid covering them, use sleeves or consult a specialist. To prevent condensation, maintain ventilation by keeping vents clear or adding grilles.