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Loft Insulation Cost Guide for 2024

Table of Contents
loft insulation

Key Summary

Here are the key points:

  • Loft insulation comes in various materials, including fibreglass, mineral wool, sheep’s wool, and cellulose. Each type has its specific application and cost implications.
  • Proper loft insulation not only conserves energy and reduces heating bills but also prevents problems like condensation, which can lead to mould growth and structural issues.
  • While DIY options are available, hiring a professional ensures that insulation is correctly fitted, addressing issues like dampness, and can provide long-term savings.

What are the Benefits of Insulating your loft?

Insulating your loft is a critical step in maintaining your home’s temperature throughout the year. 

Proper loft insulation helps in reducing heat loss, which in turn can significantly cut down on heating costs. 

This not only keeps your home warm during the colder months but also prevents overheating in the warmer seasons. Some of the main benefits of loft insulation are:

Energy Efficiency

Effective insulation reduces the need for heating, significantly conserving energy

Cost Savings

By maintaining internal temperatures through the use of insulation, homeowners can achieve substantial savings on energy bills.

Be Eco-friendly

Lower energy consumption translates to a reduced carbon footprint, making your home more environmentally friendly.

The Different Kinds of Loft Insulation

Blanket Insulation

blanket insulation

Often made from materials like fibreglass, mineral wool, or even recycled sheep’s wool, blanket insulation is user-friendly and straightforward. It typically comes in rolls that fit between standard spacing of loft joists.

Best for

Homes with standard loft spaces without too many irregularities or obstructions. It’s also an excellent choice for those considering a DIY installation.


Starting from around £20 for a roll that covers approximately 8 m2. The loft insulation cost per roll can, however, vary based on quality and brand.

Loose fill insulation

loose fill insulation

Loose fill insulation comprises materials such as cork granules, mineral wool fibre, or even recycled newspaper, which are poured or blown into loft spaces.

Best for

Ideal for topping up existing insulation or for lofts with irregular spaces or numerous obstructions.


The loft insulation cost per m2 stands at approximately £9, although costs can fluctuate based on the chosen material.

Sheet insulation

sheet insulation

Rigid boards, often created from PIR or polystyrene, define sheet insulation. It’s excellent for insulating the loft’s actual room rather than just the floor.

Best for

Homes where the loft will be, or has been, converted into a living space, ensuring both walls and floors are insulated.


For sheet insulation, the loft insulation cost per m2 uk averages around £30, with variations based on thickness and brand.

Spray Foam Insulation

spray foam insulation

A chemical solution sprayed onto surfaces which expands into foam, offering effective insulation.

Best for

Lofts with hard-to-reach areas or where there is a desire for airtight insulation.


The typical loft insulation cost per m2 for spray foam is about £35, due to the specialised application equipment and expertise required.

What's the Average Cost of Loft Insulation (UK)?

House size Blanket insulation Loose fill insulation Sheet insulation Blown fibre insulation Labour costs Time required
Terraced £125–£160 £180–£225 £250–£310 £1,375–£1,720 £150–£400 per day 3–4 hours
Semi-detached £200–£250 £290–£360 £400–£500 £2,200–£2,750 £150–£400 per day 3–4 hours
Detached £300–£375 £430–£540 £600–£750 £3,300–£4,125 £150–£400 per day 4–6 hours
Bungalow £375–£420 £700–£730 £1,000–£1,200 Around £3,588 £150–£400 per day 4–6 hours

Additional Costs

Whilst we have endeavoured to outline the general costs you may be liable for additional expenses which can include:

Labour Costs

On average, the loft insulation labour cost stands at £150£400 per day, depending on the complexity of the job and location in the UK.

Relocation of Obstructions

Costs related to relocating electrical wires or other obstructions might arise, with a day’s labour costing about £250.


If you plan to use the loft for storage post-insulation, consider loft insulation and boarding cost, averaging £55 per m2.

Specialised Insulation

Insulating pipework might be essential, costing around £6 per metre, while upgrading water cistern insulation is approximately £150.

How to Reduce the Costs of your Loft Insulation

While loft insulation is undeniably an investment, several strategies can help curtail costs:

Grants and Schemes

The government-led ECO+ scheme for home insulation is now called The Great British Insulation Scheme

Investigate government grants or schemes offering subsidies or full coverage for insulation projects. 

In March this year (2023) the government rolled out the ECO + which aims to provide financial assistance to help people insulate their homes. 

Check to see if you are eligible for the Great British Insulation scheme.

DIY Approach

For simpler insulation types, a DIY approach can save on labour costs, though it’s vital to be confident in your abilities and always prioritise safety.

Bulk Purchasing

For larger projects, buying materials in bulk can yield discounts.


Is loft insulation a one-time investment?

While loft insulation is long-lasting, its efficiency may decrease over time. It’s advisable to check insulation every couple of years and top-up or replace if necessary.

How do I Prevent Condensation in a Loft?

Preventing condensation in a loft certainly requires good insulation. However, good ventilation is just as important. 

Check the roof to ensure there are no cracks to allow additional water into the loft space.

What if my loft is already insulated?

Even if a loft is insulated, older materials or a thin layer might not be as effective. Consider adding a top-up layer or replacing outdated insulation materials.

How does loft insulation impact the property's value?

Well-insulated properties often have a higher market value due to their energy efficiency and the resultant savings on utility bills. 

If you are planning to convert your loft into living space make sure that you are compliant with building regulations.


The right loft insulation, while requiring initial investment, promises long-term dividends. 

Not only does it foster a comfortable living environment, but the cumulative savings on energy bills and the eco-friendly footprint make it a sensible and worthwhile decision for every homeowner.

If you’d like a quote for insulating your loft please get in touch at your convenience.