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How Much Does Insulation Cost?

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Wondering how much it costs to insulate your home? Depending on the type and scale of the project, costs typically range from £300 for smaller areas to £15,000 or more for full-house insulation, depending on the size and type of your home. Read on to discover the insulation options available to suit your needs and budget.

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Home Insulation Costs: Budgeting for Energy Efficiency & Comfort

Curious about the importance of home insulation for energy efficiency and comfort? Discover how effective insulation can significantly reduce your heating bills and enhance home comfort. Understanding insulation costs is key, whether you're insulating a new build or upgrading an existing home. From loft to cavity wall insulation, knowing your options can be a game-changer.

In this Price Guide we will talk about:

  1. What is Insulation and Why is it Important?
  2. Insulation Cost per m²
  3. Types of Insulation
  4. Hiring Insulation Tradespeople
  5. Hidden Costs
  6. Insulation and Energy Savings
  7. Hire Verified Insulation Tradespeople on MyBuilder
  8. Common Questions

Understanding the Basics: What is Insulation and Why is it Important?

Insulation refers to materials used in homes to reduce heat loss or gain by creating a barrier between the interior and exterior of a building. It plays an essential role in improving energy efficiency, which can lead to reduced heating and cooling costs. By maintaining a stable indoor temperature, insulation not only enhances living comfort but also contributes to a smaller carbon footprint.

Key Benefits of Insulation:

  • Energy Savings: Proper insulation can significantly reduce energy consumption, leading to lower utility bills.
  • Enhanced Comfort: Insulation helps maintain consistent indoor temperatures, making homes more comfortable throughout the year.
  • Environmental Impact: By reducing the need for heating and cooling, insulation lessens your home's carbon emissions, benefiting the environment.
  • Noise Reduction: Insulation materials also provide soundproofing, creating a quieter indoor environment.
  • Increased Property Value: Energy-efficient homes, thanks to effective insulation, often have higher resale values.
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How Much Does Insulation Cost per m²?

The cost of insulation varies based on factors such as the type of insulation, the size and layout of your home and local labour rates. When planning for insulation, consider not only the initial installation costs but also potential long-term savings on energy bills.

Here’s a table with average insulation costs per m² for various types:

Insulation TypeCost per m²
Loft (Blanket)£5–£10
Loft (Loose Fill)£8–£12
Cavity Wall£13–£30
Internal Wall£60–£100
Solid Wall (External)£60–£100
Floor£20–£40
Draught Proofing£3–£6
Pipe Insulation£1–£2 per metre

For an in-depth look at how much it costs to insulate an external wall, visit our price guide.

Note: Prices can vary depending on the specific requirements of your project and the quality of materials chosen.

Types of Insulation: Comparing Costs and Benefits

Various insulation options exist, each with unique benefits and pricing, which can significantly affect your home's energy efficiency. When deciding how much it costs to insulate your house, it's important to compare these to make an informed decision.

Loft Insulation: How Much Does it Cost?

Loft insulation is an effective way to enhance your home's energy efficiency, acting as a barrier to prevent heat from escaping through the roof.

Average loft insulation prices range from £5 to £12 per m² depending on the type, with total costs between £720 and £1,200.

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Cavity Wall Insulation: Pricing and Advantages

Cavity wall insulation is important for homes with uninsulated cavity walls, improving heat retention and reducing heat loss. It is a cost-effective solution that can protect your walls from wear and tear while also lowering energy bills.

The cost of cavity wall insulation typically ranges from £13 to £30 per m², with potential annual savings of £100 to £370.

Floor Insulation: What to Expect in Costs

Floor insulation plays a crucial role in eliminating drafts and maintaining a consistent indoor temperature. This type of insulation is particularly beneficial in reducing cold floors in winter.

The costs for floor insulation tend to be £20 to £40 per m². Plus, certain floor types might require additional installation steps, affecting the overall price.

Hiring Insulation Tradespeople: How Much Does Professional Installation Cost?

Professional installers have relevant experience and are well-equipped to handle complex installations, ensuring proper coverage and sealing. This can protect your walls and ultimately extend their lifespan.

On average, loft insulation installation may cost around £250 per day. Internal wall insulation can go up to £250 per person per day.

Save money, energy and resources by hiring an insulation tradesperson for your project! Post your job on MyBuilder today to compare quotes and find insulation companies nearby to get started.

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Hidden Costs in Insulation Installation: Be Prepared

When planning insulation projects, it's vital to be aware of potential hidden costs. These unforeseen expenses can significantly affect your budget, so understanding them can help you better prepare.

  • Insulation Removal: Removing old insulation can add unexpected removal costs.

  • Structural Adjustments: Modifications may be needed to accommodate new insulation.

  • Material Selection: Using eco-friendly materials might increase costs due to higher material prices.

  • Post-Installation Repairs: Fixing walls or floors after insulation can raise overall expenses.

  • Specialist Labour: Hiring tradespeople for tasks like electrical rerouting may increase labour costs.

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Insulation and Energy Savings: Investment Worth the Cost?

Over time, the savings on energy bills can be significant, often offsetting the initial insulation costs. According to data, homeowners can expect to save anywhere from £100 to £700 annually, depending on the insulation type and the home's specific needs. Properly installed insulation can begin to show these savings within just a few years.

Stay Cosy All Year: Hire Verified Insulation Tradespeople on MyBuilder

Embrace comfort and efficiency by ensuring your home is well-insulated with the help of insulation companies on MyBuilder. Don't wait for another chilly winter or sweltering summer – click now to post your insulation job and quickly find the right tradesperson for your project. Transform your living spaces today with MyBuilder, where professional service is just a click away!

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FAQ: Common Questions Readers Ask About Home Insulation

What are the long-term financial benefits of investing in home insulation?

Investing in home insulation can offer several long-term financial benefits. Firstly, it reduces heating and cooling costs, as insulated homes maintain a more stable indoor temperature. This can lead to lower energy bills, often resulting in annual savings of up to 20%. Over time, these savings can effectively cover the initial investment in insulation. Moreover, a well-insulated home can have increased property value when sold. Beyond direct financial savings, there is also the benefit of reduced maintenance and repair costs on heating and cooling systems, which do not have to work as hard in a well-insulated environment.

What potential challenges might arise when insulating an older home?

Insulating an older home can be challenging, especially when preserving the original structure and aesthetics. Issues like non-standard wall cavities, outdated wiring, damp and ventilation concerns must be addressed beforehand. Choosing the right insulation often requires professional input, and heritage restrictions may limit what modifications are allowed.

Are there government schemes or incentives available to help cover insulation costs?

Yes, several UK government schemes can help with insulation costs. The Energy Company Obligation (ECO) supports eligible households in improving energy efficiency. Some regions may offer additional programmes, like the Green Homes Grant (now limited). As schemes change frequently, check the UK government website or contact your local council for up-to-date information and eligibility.

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Insulation

Thin internal wall insulation

Philippa Lewis 20/07/2026 - 1.52 PM

I am interested in retrofitting thin internal wall insulation (e.g. ISO-therm) in a ground floor flat, which has solid walls and is currently not well insulated. I understand TIWI is applied directly on top of existing plaster (assuming plaster is dry and in reasonable condition) with an adhesive - then skimmed over the top. Hoping for some suggestions on how to find an approved/experienced TIWI fitter - and at a more basic level - if this would generally be an 'insulation' or a 'plastering' category of job. Thank you

2 answers

Insulation

External wall insulation

Anonymous user 23/06/2026 - 11.52 AM

it is semi-detached house built in 1920s; solid wall construction. approx 720 sq ft (according to estate agents). There is a lot of space all around the front, back and side of the house. The walls are quite cold, and I think are damp. Insulation is required. what insulation is more suitable/appropriate (rockwool? celatex? any other?) is one better than another? Is there an optimum time of year for it to be installed? (summer?) or does it not matter? presumably it has be dry weather?

2 answers

Insulation

Cavity wall insulation removal

Anonymous user 22/06/2026 - 7.50 AM

I have CWI which i am pretty sure has failed. Do companies come out & do inspections to check or is it something i could do myself. I'm assuming it's just a matter of drilling a hole into the cavity & putting a camera through, or would using a camera that shows up any heat loss be better. Is CWI better nowadays than it used to be? Many thanks

2 answers

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