{"id":43973,"date":"2023-03-16T16:26:11","date_gmt":"2023-03-16T16:26:11","guid":{"rendered":"https:\/\/www.ratedpeople.com\/blog\/?p=43973"},"modified":"2026-04-02T12:39:05","modified_gmt":"2026-04-02T11:39:05","slug":"how-much-does-loft-insulation-cost","status":"publish","type":"post","link":"https:\/\/www.ratedpeople.com\/blog\/how-much-does-loft-insulation-cost","title":{"rendered":"How much does loft insulation cost in 2026?"},"content":{"rendered":"\n

The prices in this guide are accurate, as of 2026*<\/em><\/p>\n\n\n\n

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Average cost to install loft insulation<\/figcaption><\/figure>\n\n\n\n

Properly insulating your loft can make your home more energy efficient, helping you cut your heating bills. Insulation pays you back in the long run and is relatively cheap to install. It\u2019s no surprise that adding insulation is one of the most popular eco home improvements<\/a>, as it can also add value to your home<\/a>. <\/p>\n\n\n\n

If you\u2019re trying to save money (and keep your house as warm as possible) then the right insulation can do both these things. If you\u2019re converting your loft, or building an extension, then proper loft insulation is also a building regulation.\u202f <\/p>\n\n\n\n

On average, your loft insulation could cost you between \u00a3960 <\/strong>and \u00a32,400, <\/strong>depending on how big your loft is. <\/strong>For a more accurate quote on how much you might spend on loft insulation, find a local insulation specialist.<\/a><\/p>\n\n\n\n

This guide covers a range of loft insulation methods for several different properties, as well as other considerations you might want to make. There are also some useful tips if you want to DIY your loft insulation. <\/p>\n\n\n\n

The standard thickness recommended by the government for loft insulation is 270mm. Cost of labour also rises in London and the South East. The prices in this guide include the cost of materials and <\/strong>installation. They also include<\/strong> VAT. <\/p>\n\n\n\n

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Is insulating your attic energy efficient? <\/strong><\/h3>\n\n\n
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An uninsulated home can lose a quarter of its heat, just from the roof. With a 40-year lifetime, correctly installed loft insulation will pay you back several times over by reducing your energy bills every year. <\/p>\n\n\n

This is how much you could save on a yearly basis, by properly insulating your loft: <\/p>\n\n\n

 <\/td>
Detached home 
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Semi-detached home 
<\/td>
Mid-terrace home 
<\/td>		Bungalow\u202f <\/td><\/tr>
Turning an uninsulated loft into a 270mm insulated loft <\/td> \u00a3580<\/strong> <\/td> \u00a3255<\/strong> <\/td> \u00a3230<\/strong> <\/td> \u00a3365<\/strong> <\/td><\/tr>
Turning a 120 mm insulated loft into a 270 mm insulated loft <\/td> \u00a340<\/strong> <\/td> \u00a325<\/strong> <\/td> \u00a3<\/strong>20<\/strong> <\/td> \u00a3<\/strong>35<\/strong> <\/td><\/tr><\/tbody><\/table>
Energy bill savings, per year, according to the <\/em>Energy Saving Trust<\/em><\/a> <\/figcaption><\/figure>\n\n\n

Properly insulating your loft will also save thousands of kg in CO2 emissions, helping you reduce your carbon footprint. <\/p>\n\n\n

Want to reduce your energy bill even more? Check out our cavity wall insulation cost guide<\/a>.<\/p>\n\n\n\n\n\n\n\n\n

Which loft insulation is best? <\/strong><\/h3>\n\n\n
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The type of insulation you get will depend on how easy it is to access your loft, and whether you want to install your insulation yourself or hire a professional. Different insulations use different materials, so it’s also worth considering how eco-friendly you want to be. <\/p>\n\n\n

Insulation material<\/strong> <\/td> What is it?<\/strong> <\/td> Pros<\/strong> <\/td> Cons<\/strong> <\/td>Can you<\/strong> DIY<\/strong> ?<\/strong> <\/td><\/tr>
Loose-fill insulation<\/strong>  <\/td>Loose material like cellulose fibre or wool which are placed evenly around the loft. Often used to top up existing insulation. <\/td>Good for filling irregular loft spaces and gaps between joists\u202f 

Good for areas that are harder to access\u202f 

Light, easy to handle\u202f <\/td>		May require a professional to install it\u202f 

Not suitable for draughty lofts (can be dislodged) <\/td>		Yes, for a confident DIYer <\/td><\/tr>
Blanket insulation<\/strong> <\/td>Made from mineral fibre, glass, rocks, or felt, this is one of the most common types of loft insulation.\u202f <\/td>Easy to install (can be DIY) 

Cheapest type of loft insulation 

There are some more eco-friendly options like recycled glass <\/td>		Some materials used in blanket insulation are skin irritants\u202f 

Reduce the space in loft (head height) 

Bulky and doesn\u2019t fit in all areas of loft 

If not installed properly, it\u2019s liable to tearing <\/td>		Yes <\/td><\/tr>
Sheet loft insulation<\/strong> <\/td>Insulated boards that are built to insulate the sloping sides of your loft. These fit across loft joists. <\/td>Good for lofts which have limited head space 

Very effective (high value per unit thickness) <\/td>		Not eco-friendly\u202f 

More expensive than most other options 

Can\u2019t be used on structural elements <\/td>		Yes, for a confident DIYer <\/td><\/tr>
Spray foam insulation<\/strong> <\/td>A layer of foam is sprayed from a special machine over the areas that need insulating. <\/td>Eco-friendly\u202f 

Can improve structural strength of home\u202f 

Good for hard to access areas of loft\u202f 

Highest R-values (the higher the R-value, the greater the insulating effectiveness)

Sound-proof\u202f\u202f <\/td>		More expensive than most other options\u202f 

Require specialist installation\u202f 

Made from polyurethane which contains toxic compounds 

Messy to install \/ leaks through unsealed joints\u202f <\/td>		No <\/td><\/tr><\/tbody><\/table>
Costs, pros, and cons of different loft insulation materials\u202f <\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n

How long does it take to install loft insulation? <\/strong><\/h3>\n\n\n
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Most loft insulation installations take under a day and can be completed within a couple of hours. Blanket installations take less time than sheet installations, but you can expect labour costs to be about the same, especially if you\u2019re paying a daily labour rate. <\/p>\n\n\n

It will take longer than this to install insulation if you\u2019re doing it yourself. <\/p>\n\n\n\n\n\n\n\n\n

How much does it cost to insulate a loft? <\/strong><\/h2>\n\n\n
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Looking at average installation costs for an entire loft, you could pay around: <\/p>\n\n\n

 <\/td>40m2<\/sup><\/td>60m2<\/sup><\/td>80m2<\/sup><\/td>100m2<\/sup><\/td><\/tr>
UK average <\/td>\u00a3920<\/strong><\/td>\u00a31,400<\/strong><\/td>\u00a31,860<\/strong> <\/td>\u00a32,320<\/strong><\/td><\/tr><\/tbody><\/table>
Costs to insulate a loft in different kinds of homes<\/em> <\/figcaption><\/figure>\n\n\n

The bigger your loft, the more it will cost to insulate, especially if you end up having to pay for additional services, such as rewiring electrics. The type of insulation you get will also affect costs. The above examples include the cost of blanket loft roll insulation.<\/p>\n\n\n

To find out the prices for different insulation types, let us know what you have in mind by speaking to a skilled tradesperson today. <\/p>\n\n\n

FIND A LOFT INSULATION SPECIALIST<\/font><\/a><\/center><\/p>\n\n\n\n\n\n\n\n\n

Can I insulate my loft myself? <\/strong><\/h3>\n\n\n
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If you do want to install insulation yourself, then the above costs will give you a sense of how much materials will set you back. Though some types of insulation can be installed DIY, professionally installed insulation lasts longer, and is generally more effective.\u202f <\/p>\n\n\n

Since insulation is installed primarily to be as cost-saving as possible, we recommend you hire a professional, unless you are confident you can insulate your loft properly yourself. <\/p>\n\n\n

If you do want to do it yourself, you should keep a few things in mind: <\/p>\n\n\n

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  1. Make sure the wiring in your loft is kept above the insulation. If your wires are getting stretched because of your new insulation, then you should hire an electrician to reroute them. <\/li>\n\n<\/ol>\n\n\n
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    1. You should clean your loft and clear it of any stuff that is being stored there before you begin insulating, regardless of whether you want to DIY or hire a loft insulation installer. <\/li>\n\n<\/ol>\n\n\n
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      1. Don\u2019t forget about your pipes and tanks. These will need to be insulated as well to prevent them from freezing. <\/li>\n\n<\/ol>\n\n\n
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        1. If you want to use your loft as a storage space, then you’ll need to lay boards over your joists. If you want to convert your loft into a room, you\u2019ll need to hire professionals to do this. <\/li>\n\n<\/ol>\n\n\n
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          1. Don\u2019t use less than the recommended amount of insulation. The government recommends insulation of 270mm thickness. Using a thinner size will cost you money in the long run, because your less efficient insulation will raise your energy bills. <\/li>\n\n<\/ol>\n\n\n
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            1. Make sure you don\u2019t cover any vents whilst you lay down your insulation. Your loft needs to be properly ventilated to avoid damp<\/a> from developing. If there aren\u2019t enough vents in your loft, you may need to have additional ones installed. If you do have a lot of damp problems, then we recommend you don’t opt to DIY, as you\u2019ll need a professional to help fix this before your insulation is installed. <\/li>\n\n<\/ol>\n\n\n
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              1. To calculate how much insulation you\u2019re going to need, you need to know the floor area of your loft (length x width), and the depth of insulation you already have.\u202f Knowing the joist heights in your loft is also a good idea, so that you can know whether to lay the first layer of insulation between joists. Don\u2019t worry about your old insulation, you can lay new insulation over it (just make sure you\u2019re not squashing it down).\u202f <\/li>\n\n<\/ol>\n\n\n

                Using 100 mm thick insulation rolls with a 8.3 m2 coverage, you can calculate how many rolls you\u2019ll need by doing: Area (in sq m) x (1 – 0.1) \u00f7 8.3 sq m<\/strong>. This is the equation you need for laying a base layer (25mm or less of existing insulation). If you want to add a top layer over an existing layer of insulation (for instance 100mm), the equation would be: Area (in sq m) \u00f7 6.47 sq m <\/strong>(using 170mm rolls with a 6.47 m2 coverage). <\/p>\n\n\n

                DIY loft insulation installation will save you from having to hire an installer but might mean your loft will be less energy-efficient than it could be. <\/p>\n\n\n\n\n\n\n\n\n

                Loft insulation labour costs<\/strong><\/h2>\n\n\n
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                If, on the other hand, you want to hire someone to insulate your loft for you, so that you can ensure everything is done correctly and you maximise the heat retention in your home, then you can do so here. <\/p>\n\n\n

                FIND A LOFT INSULATION SPECIALIST<\/font><\/a><\/center><\/p>\n\n\n

                The average loft insulation costs around \u00a3450 <\/strong>and \u00a31,200 <\/strong>(labour costs only) for the entire project. How much you end up spending depends on the scope of your project, and where you live in the UK.\u202f <\/p>\n\n\n

                Labour costs rise in London and the South East, sometimes by as much as 20% more on average. <\/p>\n\n\n\n\n\n\n\n\n

                Additional costs <\/strong><\/h3>\n\n\n
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