Loft insulation Costs

Compare Loft & Roof Insulation Prices Near You

Home > Insulation Projects > Loft insulation

Average Loft insulation cost

The typical cost of Loft insulation is £600. Costs differ based upon the materials and the contractor selected. The upper price range can be as high as £690. The material costs are in most cases approximately £150

Average price per Loft insulation job in 2025

Avg. price low

Avg. price low
£484

Avg. price

Avg. price
£1,534

Avg. price high

Avg. price high
£2,564

£2700

£2025

£1350

£675

£0

Prices based on actual Loft insulation costs for your area, as reported by local LeadsDoWork members.

Loft insulation installation cost in your area 2025

Labour cost £420
Material cost £150
Waste removal £30
Time frame: 1-3 days

Advantages for Loft insulation

  • You'll prevent up to one half of the heat generated in your home from disappearing
  • Your home will feel warmer in the winter, and cooler in the summer
  • Reduce your energy bills - this could be as much as £200-250 per year with loft insulation
  • Your carbon emissions will also be reduced. This could be as high as 1.4t

Disadvantages for Loft insulation

  • Condensation and damp issues after loft insulation if done incorrectly

Loft insulation Manufacturers

Loft insulation FAQs

What is the best loft insulation?

If you have a loft, then the next thing that’s crucial is a loft insulation. Asides from cutting down on your carbon footprint, when you’re able to install an effective loft insulation you can slash your heating bills by up to £250 per year. What’s more? Besides making your home more energy efficient, it can also increase the value of your property a great deal. So if you’re also considering the insulation of your loft, one of the few things that comes to mind is, what loft insulation is the best to incorporate? In order to help you make the best informed decision possible, this post is going to address this issue and put you on the right path.

 

In truth, there’s no way to say exactly which type of insulation is the best as all types usually have a different purpose as well as usage. The insulation you choose for your home’s loft is be based largely on the how you’re going to make use of the space as well as any unique challenges you might face given the shape of your home’s loft. Below are some types of insulation to give you a better idea:

  • Blanket insulation. This is the most common type that comes in rolls of rock, glass or mineral fibre ( or foil-backed felt ). It normally the most affordable and also a good all-purpose insulation which is easy to fit although not suitable for the roof.
  • Loose-fill insulation. This type of insulation features a loose, lightweight material such as cork granules, cellulose fibre, mineral wool etc. It can either be incorporated as a top up or on its own. The primary drawback is it isn’t very secure and can also be very messy.
  • Sheet insulation. This is the best solution for the roof’s underside as it offers a highly effective insulation for your loft space and can also be decorated over. The drawback here is that it’s usually the most expensive type to purchase and install.
How long does it take to install insulation?

How long it takes to install insulation will depend on the size of your property. In general, loft and cavity wall insulation can be installed in a day or two. External wall insulation will usually take longer to install. The rep or installer will be able to advise you when quoting for the job how long this will be.

How to insulate a loft?

Do you know about 25 percent of heat that escapes from an uninsulated house are lost through the roof? Fortunately, roof insulation is something that can done by all DIYers irrespective of their experience levels. However, if you happen to lack the confidence necessary to pull off this, then it’s strongly recommended that you hire the services of a professional who can guarantee the best results and also save you time and money that could arise from potential cost mistakes. Let’s take a look!

  • Clear out all clutter. This involves taking out all the rubbish and clutter from the loft. In order to work effectively, you’ll need a totally clear and empty loft space.
  • Ensure that there’s sufficient insulation. The importance of a good ventilation cannot be overstated. Poor ventilation will result in forming of condensation and this condensation can make the roof timbers rot and compromise the structural integrity of the entire roof. If there are no roof windows which is the easiest way to provide a loft ventilation, the next best option would be to follow the loft floor along to the point where the roof comes down to meet it. There should be a gap at this point, also referred to as the eaves, between the outside wall and the underside of the roof.
  • Measure your loft area. Take a measurement of the loft space in order to calculate the amount of insulation as well as the type you need. If you’re not sure, always get more that it’s required as skimming on the amount you use will only back fire in form of increased energy costs
  • Check for water pipes.

 

To get started, simply make sure all cracks and gaps in the ceiling are filled using a standard filler or decorator caulk. Once done, clean the gaps in the joists and even to the point of hovering all the dust up. Finally,check for the hazards that can cause you problems before laying the loft insulation.

Will insulation save me money on my energy bills?

This depends on the amount of insulation already present in your property. However, adding insulation has been proven to improve the energy efficiency of your home and decrease your heating bills, this is more obvious in older properties or where single glazing is still in situ.

How thick should loft insulation be?

Over the years there has been an increase in the recommended thickness of loft insulation by the government. Obviously, the reason behind this is pretty simply - the thicker the layer of your loft insulation the bigger your savings. The UK government is very keen to every house in the country to have loft insulation fitted where possible as it helps to minimize the heating demands of these properties. Households get to benefit from loft insulation in so many ways which includes reduced energy energy bills as well as having a home that stays at a more comfortable temperature for longer.

 

Generally, for the government energy efficiency is crucial as it implies that the highest demand ( which is usually the time of the day when gas or electricity use is at its peak ) reduces, since each building requires slightly less energy. Overall, that ultimately implies that new power plants don’t have to be built which is some nice cost savings for the government.

 

In the 1980’s, any thickness of loft insulation from 25 mm to 50 mm was considered the standard. But then, building regulations stated that homes should have as much as 100 mm of loft insulation. Over time, this gradually increased to 270mm for new builds and also recommended for other properties, although not essential. As a result of this, there’s always a need to check how much insulation you currently have in your loft before you decide to purchase more. You may discover that you already have something within the range of 20 mm to 200 mm up there and knowing this and the insulation values will assist in determining how much more you’ll need to purchase, if any at all. You should also note that some modern materials can offer the same thermal insulation whilst not being as thick.

Is loft insulation flammable?

When thinking about the right insulation material for your loft, some of the first few things that comes to mind is the various properties of that material as well as how good they fit with your home’s needs.naturally, you’d like to ensure that the insulation will be efficient enough to add to the overall energy efficiency of your home, however there are also other features that may not get as much attention but also happens to be equally important. As the primary function of an insulation is to blanket your house to offer a barrier against heat loss, going for an insulation material that’s also fireproof is crucial as loft insulation can burn. Although most insulation materials are fireproof, a myriad of problems can actually make your insulation burn.

 

For instance, fibreglass insulation is produced using glass combined with plastic polymers and is naturally resistant to fire. However, even at that you’d have to be careful with batts that are supported with foil or paper due to the fact that these materials can burn pretty quickly. Cellulose, on the other hand, is not fireproof and is required to be treated by other flame retardants in order to help reduce combustion. Some of the best insulation materials that are resistant to fire includes the following:

  • Fibre glass. This is made of glass that’s spun into fibres, then combined using plastic polymers. As a result, fiberglass insulation is naturally resistant to fire.
  • Mineral wool. Having a high melting temperature, this insulation material happens to be a great fit for thermal applications due to its superior fire resistant properties. In fact, mineral wool is still naturally non-combustible even if composed of recycled iron and steel by-products, or from actual mineral rock itself.
Which type of insulation is best?

The best type of insulation for your property will depend on the type of walls and any insulation that’s already present. It’s usually a good idea to have some form of wall insulation as well as loft insulation, as this helps to prevent heat loss in both areas.

How much is loft insulation?

More often than not, several homeowners fail to realize there’s so much value sitting right under their roof - the loft. When a loft is insulated, there are so many juicy benefits that can be derived. It can go a long way to save increase you energy savings and several more functions. Therefore, if you really wish to maximize the space under your home’s roof, you’d have to considering insulating it. So how much would it cost to have your loft insulated? Here, you’ll discover the cost of insulating your lofts so you that you can set a budget and start to plan.

 

The cost of insulating a loft is actually affordable for several individuals, however, this depends on a wide range of factors such as the size of the house as well as the type of insulation being installed. One significant factor is the insulating material that you choose to install. If done properly, you’d be able to prevent heat from escaping through the roof of the house which helps improve energy efficiency and ultimately, save you some money on heating bills.

 

If you’d prefer to make it a DIY project and you go for a blanket insulation it costs about £5 per m2. therefore, this will cost within the range of £100 to about £150 for a small home.

 

For a professional service, you’ll be provided with a quote for both the materials and labour. The amount will be based on the number of insulation required, the company hired, your location as well as the method selected. The price to purchase and install blanket insulation  would be between the range of £300 to £400 depending on the size of your home.

How To Install Loft insulation With ROCKWOOL Thermal Insulation Roll

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love LeadsDoWork it's a big part of my …

Love LeadsDoWork it's a big part of my Business I would recommend to anyone

Weatherdry Insulation

Based: in Tamworth, B79

We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in res...

Latest review

John W., SY6
14th December 2020

Insulation | Loft / Roof in Church Stretton

Polite and friendly but did not provide the materials we wañted .

BAU UK

Based: in Petersfield, GU31

BAU UK are a complete home improvements specialists located in the South Coast, with focuses ranging...

Latest review

Paul A., BH15
15th May 2021

Insulation | Loft / Roof in Poole

Prompt response, pleasant and courteous contact, reasonably priced, work satisfactori...

Metropolitan Insulation

Based: in London, N5

Usemyloft is a superior form of loft insulation. It is permanent unlike conventional fibreglass/mine...

Latest review

Sennen C., HA1
20th October 2015

Insulation | Loft / Roof in Harrow

Punctual and finished on time. Good value for money

Bright Home Renewables

Based: in Bournemouth, BH8

Bright Home Renewables are a leading polyurethane spray foam insulation, roofing and loft room speci...

Latest review

Paul F., HP10
7th March 2017

Insulation | Loft / Roof in High Wycombe

We were unable to proceed as the cost was more than we had anticipated, but the compa...

Renewable Solutions Team

Based: in Leigh, WN7

Renewable Solutions Team is based in Leigh and have 4 positive reviews

Latest review

Matthew M., WA5
18th December 2016

Insulation | Loft / Roof in Warrington

Sent a person out to do surveyor out he did his job was a nice fella explained things...

DB Energy Assessments

Based: in Kidderminster, DY10

We are passionate about renewable energy and helping people and businesses save money through their ...

Latest review

P., B16
18th October 2016

Insulation | Loft / Roof in Birmingham

Honest opinion given which I valued very highly Could easily have said I need to redo...

GM Energy

Based: in Peterborough, PE1

GM Energy is based in Peterborough and have 26 positive reviews

Latest review

Robert H., PE19
2nd December 2015

Insulation | Loft / Roof in St. Neots

Good solid company.

Rated Local builders

Weatherdry Insulation Ltd

8 review(s)
Based: in Tamworth, B79 7XH

We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in resolving damp issues connected to any form of damp. We can also offer the latest solutions to condensation. We offer a FREE, NO OBLIGATION damp ...

BAU UK Ltd

11 review(s)
Based: in Petersfield, GU31 4AD

BAU UK are a complete home improvements specialists located in the South Coast, with focuses ranging from windows and doors to insulation and solar. Fully accredited, insured and trained in the latest technologies, our team can offer leading services...

Metropolitan Insulation

6 review(s)
Based: in London, N5 5DU

Usemyloft is a superior form of loft insulation. It is permanent unlike conventional fibreglass/mineral wool which deteriates and renders your loft floor unusable. We insulate under the roof in the rafters,keeping the heat out in summer and creating ...

Bright Home Renewables LTD

7 review(s)
Based: in Bournemouth, BH8 8EW

Bright Home Renewables are a leading polyurethane spray foam insulation, roofing and loft room specialist. Whether you are a domestic client looking for loft insulation or roof stabilisation or an architect or contractor needing assistance with a ...

DB Energy Assessments

2 review(s)
Based: in Kidderminster, DY10 2TN

We are passionate about renewable energy and helping people and businesses save money through their energy bills, and potentially even make a profit by making a few changes. DB Energy Assessments has ventured into a number of markets in the 5 yea...

Renewable Solutions Team LTD

4 review(s)
Based: in Leigh, WN7 3XZ

Renewable Solutions Team LTD based in Leigh, offer services in Insulation. They have an average rating of 4.13 from 4 review(s). See their latest 4 star review below

GM Contracts LTD T/A GM Energy

26 review(s)
Based: in Peterborough, PE1 5TP

GM Contracts LTD T/A GM Energy based in Peterborough, offer services in Insulation. They have an average rating of 4.32 from 26 review(s). See their latest 5 star review below

Similar Customer Enquiries for Loft insulation

08 Mar

Insulation | Loft / Roof

Dunfermline, Inverkeithing - KY11

Enquiry from: Pamela B

Start Date: Immediate

we’ve had our roof replaced but we need the flooring of our attic insulated are you the property owner: owner of the property how many bedrooms do you have: 3-4 do you currently have loft insulation...

Post a similar request >

03 Mar

Insulation | Loft / Roof

Inverurie - AB51

Enquiry from: John M

Start Date: Immediate

We are looking for quotes to increase our loft insulation to 270mm which we have been told by H.E.S. is required before they will give us a grant for a an air source heat pump. We have a 4 bedroomed b...

Post a similar request >

03 Mar

Insulation | Loft / Roof

Crewe - CW2

Enquiry from: Elaine B

Start Date: Immediate

roof insulation (loft already insulated). Dormer bungalow and the roof from loft level to lower part of roof is not insualated.

Post a similar request >

26 Feb

Insulation | Loft / Roof

Stoke-on-Trent - ST8

Enquiry from: Martin B

Start Date: Immediate

Loft insulation instalation.

Post a similar request >

25 Feb

Insulation | Loft / Roof

Skipton - BD23

Enquiry from: George B

Start Date: Immediate

polymer between joists loft insulation

Post a similar request >

24 Feb

Insulation | Loft / Roof

Haverfordwest - SA61

Enquiry from: Amanda R

Start Date: Immediate

hello, I'm looking for quotes from local companies who can improve the insulation and board out my loft within the next month or so. thanks

Post a similar request >

23 Feb

Insulation | Loft / Roof

Paisley - PA2

Enquiry from: Brian W

Start Date: Immediate

Loft insulation Lead

interior conservatory roof insulation with plasterboard ceiling are you the property owner: owner of the property how many bedrooms do you have: 3-4 property type: detached do you currently have loft ...

Post a similar request >

19 Feb

Insulation | Loft / Roof

Whitehaven - CA28

Enquiry from: Christine B

Start Date: Immediate

Loft re insulated please, old insulation in place

Post a similar request >

09 Feb

Insulation | Loft / Roof

Hereford - HR2

Enquiry from: Shelley R

Start Date: Immediate

Price quote for a basic roof insulation of a conservatory roof measuring 3 metres x 1.8 metres please.

Post a similar request >

06 Feb

Insulation | Loft / Roof

Buckley, Mold - CH7

Enquiry from: Arthur I

Start Date: Immediate

Looking to get loft insulation blower

Post a similar request >

28 Jan

Insulation | Loft / Roof

Daventry - NN11

Enquiry from: Russell K

Start Date: Immediate

Put new insulation on top of old insulation

Post a similar request >

23 Jan

Insulation | Loft / Roof

Daventry - NN11

Enquiry from: Doreen M

Start Date: Immediate

Instal extra loft insulation

Post a similar request >

20 Jan

Insulation | Loft / Roof

London - E8

Enquiry from: Matthew O

Start Date: Immediate

i need a quote for the lofts insulation are you the property owner: owner of the property how many bedrooms do you have: 1-2 do you currently have loft insulation: no age of property: 1900-30 are you ...

Post a similar request >

20 Jan

Insulation | Loft / Roof

Bristol - BS16

Enquiry from: Julie W

Start Date: Immediate

It is a 1 bed flat which has some insulation already, but have bought 3 rolls of ieco insulation to top up as there is condensation in the Attic.

Post a similar request >

19 Jan

Insulation | Loft / Roof

Beverley - HU17

Enquiry from: Laura F

Start Date: Immediate

Conservatory roof insulation to make it warmer in winter and cooler in summer

Post a similar request >

18 Jan

Insulation | Loft / Roof

Thirsk - YO7

Enquiry from: Sharon S

Start Date: Immediate

I require more insulation in my loft

Post a similar request >

17 Jan

Insulation | Loft / Roof

London - SW17

Enquiry from: Rohan S

Start Date: Immediate

roof insulation needed

Post a similar request >

15 Jan

Insulation | Loft / Roof

Deeside - CH5

Enquiry from: Bradey H

Start Date: Immediate

Loft insulation, semi detached house, 3.2m x 10m

Post a similar request >

14 Jan

Insulation | Loft / Roof

Buckley, Mold - CH7

Enquiry from: Laura H

Start Date: Immediate

Loft insulation quote request

Post a similar request >

13 Jan

Insulation | Loft / Roof

Liskeard - PL14

Enquiry from: Andrew A

Start Date: Immediate

Loft insulation is already in place but needs to be brought up to modern code standards (270 mm)

Post a similar request >

Local & reliable builders near me

Tell us about your loft insulation project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in your area

Get free, no-obligation local loft insulation quotes from 4 verified builders working in your area.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.