Question 1

How much does loft insulation cost in the UK?

Accepted Answer

On average, you can expect to pay the below for loft insulation in [Location]:

-   **£725** - basic quilt insulation    
-   **£1206** - quilt insulation for a detached house (270mm)    
-   **£825** - quilt insulation for a semi-detached house (270mm)    
-   **£654** - quilt insulation for a terraced house (270mm)    
-   **£1205** - quilt insulation for a bungalow (270mm)
    
The final invoice for your loft insulation usually depends on loft size, type of insulation, and whether it’s a DIY or professional installation.

Always get three or more [written quotes](https://www.checkatrade.com/blog/ask-a-trade/should-i-receive-a-written-quote-for-a-job/), including all materials, labour and VAT, to compare prices.

Get more info with our [loft insulation cost guide](https://www.checkatrade.com/blog/cost-guides/loft-insulation-cost/).

Question 2

How much does it cost to insulate a cavity wall?

Accepted Answer

Average cavity wall insulation costs in [Location] are:

-   **£4,600** - detached property    
-   **£2,700** - semi-detached property    
-   **£1,800** - mid-terrace    
-   **£2,400** - bungalow    
-   **£950** - flat    
-   **£30 - £65 per m²** for polyurethane foam    
-   **£25 - £30 per m²** for glass wool    
-   **Up to £300** - cavity wall insulation survey
    
Cavity wall insulation prices typically depend on the property's size and the insulation type.

Get more detailed advice in our [cavity wall insulation cost guide](https://www.checkatrade.com/blog/cost-guides/cavity-wall-insulation-cost/).

Question 3

How much does spray foam insulation cost?

Accepted Answer

Spray foam insulation costs depend on your property's size, the type of foam used (open-cell or closed-cell), and how much coverage area needs treating. It typically costs more per square metre than blown-fibre alternatives like mineral wool or glass wool, mainly due to material and labour costs. For a detailed breakdown, see our [Icynene insulation cost guide](https://www.checkatrade.com/blog/cost-guides/icynene-insulation-cost/).

Question 4

What is the best insulation to use?

Accepted Answer

Which insulation you choose depends on your budget and the size and type of the area to be insulated.

Popular insulation choices include:

-   Mineral wool is durable, non-combustible, aids noise reduction and can be inserted on walls and in lofts
-   Glass wool is sustainable, efficient and good at reducing energy bills
-   Polystyrene insulation boards can be inserted in most places, reduce heat transfer and improve energy efficiency
-   Fibreglass is non-combustible, fire-resistant, and mould/mildew-resistant
-   Foil insulation is easy to install onto roof rafters, doesn't take up excess space, reduces heat loss and prevents condensation
-   Spray foam insulation expands to fill gaps other materials can miss, and works well in awkward roof or wall spaces, though it usually costs more than blown-fibre options

Chat with a professional insulation installer in [Location] for more advice. They can inspect your home and recommend the most suitable solution based on your needs.

Until then, get more [insulation advice here](https://www.checkatrade.com/blog/hub/insulation/).

Question 5

How to insulate a house in the UK?

Accepted Answer

How you insulate your home depends on the placement of the insulation and its materials.

*[Loft insulation](https://www.checkatrade.com/blog/expert-advice/loft-insulation-all-you-need-to-know/)* is popular for reducing heat loss, whereas floor insulation is essential for ground-floor rooms.

*[Cavity wall](https://www.checkatrade.com/blog/expert-advice/cavity-wall-insulation/)* or solid wall insulation can cut heating costs and improve home comfort. However, you’ll need to check with an insulation specialist or surveyor, as not all walls are suitable for wall insulation.

*[Draught proofing](https://www.checkatrade.com/blog/expert-advice/draught-proofing-home/)* is a more DIY-friendly form of insulation; you’ll just need to seal gaps around doors, windows, and other openings.

Chat with [local insulation installers](https://www.checkatrade.com/blog/insulation-installer-near-me/) to understand what insulation services are available in your area and how much they'll cost.

Question 6

Is loft insulation DIY-friendly?

Accepted Answer

If you've got the know-how and confidence, you can DIY your loft insulation.

But it depends on the type of insulation you're installing; some are easier to install than others. Rigid board, foil, and blanket insulation are more DIY-friendly insulation materials.

Consider hiring a professional insulation installer in [Location] for the best results.

Question 7

How long does loft insulation last?

Accepted Answer

Loft insulation is an incredibly long-lasting home improvement project, often lasting 40 years or more, though the exact lifespan depends on the type, installation, and quality of the material. Its effectiveness can diminish over the years, so it's worth arranging regular inspections and topping it up when needed.

Question 8

Can I get a grant for loft insulation in the UK?

Accepted Answer

You may be eligible for a government grant to cover the cost of loft insulation.

Schemes available include:

-   *Great British Insulation Scheme* provides free or cheaper insulation to help reduce your home's energy bills
    
-   *Energy Company Obligation* provides funding to help households improve the energy efficiency of their homes
    
-   *Home Upgrade Grant (HUG)* is a scheme that includes energy efficiency upgrades and low-carbon heating
    
Always check you meet the criteria before applying for any loft insulation grants.

Question 9

What is better, cavity wall or loft insulation?

Accepted Answer

Both improve your home's comfort and energy efficiency, but in different ways. Loft insulation reduces heat loss through the roof, is easy to install and often DIY-friendly, and tends to be the cheaper option; cavity wall insulation tackles heat loss through the walls and helps with condensation, but usually costs more and needs professional fitting. Which one suits you depends on your budget and property, so it's worth getting tailored advice from a professional insulation engineer.

Question 10

How long does it take to install loft insulation?

Accepted Answer

How long loft insulation takes depends on your loft's size, ease of access, and any job-specific difficulties, so timings vary from property to property. A professional installer can give you an accurate estimate for your job before work begins.

**Ready to contact insulation professionals in [Location]?**

Find [insulation installers near you](https://www.checkatrade.com/blog/insulation-installer-near-me/), or [request a quote](https://www.checkatrade.com/post-a-job) so our chosen professionals can contact you directly.

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