How a lot does loft insulation value in 2023?

#loft #insulation #value

The costs on this information are correct, as of 2023

Illustration of a loft with arrows pointing at different types of loft insulation with prices according to size
Common value to put in loft insulation

Correctly insulating your loft could make your house extra vitality environment friendly, serving to you narrow your heating payments. Insulation pays you again in the long term and is comparatively low cost to put in. It’s no shock that including insulation is among the hottest eco dwelling enhancements, as it might additionally add worth to your house. 

In the event you’re attempting to save cash (and preserve your own home as heat as doable) then the appropriate insulation can do each this stuff. In the event you’re changing your loft, or constructing an extension, then correct loft insulation can be a constructing regulation.  

On common, your loft insulation might value you between £920 and £2,320, relying on how massive your loft is. This information covers a spread of loft insulation strategies for a number of totally different properties, in addition to different concerns you may wish to make. There are additionally some helpful ideas if you wish to DIY your loft insulation. 

The usual thickness beneficial by the federal government for loft insulation is 270mm. Value of labour additionally rises in London and the South East. The costs on this information embody the price of supplies and set up. Additionally they embody VAT.

Picture of a loft with insulation
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Is insulating your attic vitality environment friendly?

Picture of a person checking the thermal efficiency of loft insulation
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An uninsulated dwelling can lose 1 / 4 of its warmth, simply from the roof. With a 40-year lifetime, appropriately put in loft insulation can pay you again a number of instances over by decreasing your vitality payments yearly. 

That is how a lot you may save on a yearly foundation, by correctly insulating your loft: 

  Indifferent dwelling  Semi-detached dwelling  Mid-terrace dwelling  Bungalow  
Turning an uninsulated loft right into a 270mm insulated loft   £580   £255   £230   £365 
Turning a 120 mm insulated loft right into a 270 mm insulated loft   £40   £25   £20   £35 
Power invoice financial savings, per yr, based on the Power Saving Belief 

Correctly insulating your loft can even save hundreds of kg in CO2 emissions, serving to you scale back your carbon footprint. 

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Which loft insulation is finest? 

Picture of loft insulation rock wool rolls
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The kind of insulation you get will rely on how simple it’s to entry your loft, and whether or not you wish to set up your insulation your self or rent an expert. Totally different insulations use totally different supplies, so it’s additionally price contemplating how eco-friendly you wish to be. 

Insulation materials   What’s it?   Professionals   Cons  Are you able to DIY ? 
Free-fill insulation   Free materials like cellulose fibre or wool that are positioned evenly across the loft. Usually used to high up present insulation.  Good for filling irregular loft areas and gaps between joists  

Good for areas which are tougher to entry  

Gentle, simple to deal with  

Could require an expert to put in it  

Not appropriate for draughty lofts (might be dislodged) 

Sure, for a assured DIYer 
Blanket insulation  Produced from mineral fibre, glass, rocks, or felt, this is among the most typical forms of loft insulation.   Simple to put in (might be DIY) 

Most cost-effective sort of loft insulation 

There are some extra eco-friendly choices like recycled glass 

Some supplies utilized in blanket insulation are pores and skin irritants  

Scale back the area in loft (head peak) 

Cumbersome and doesn’t slot in all areas of loft 

If not put in correctly, it’s liable to ripping 

Sheet loft insulation  Insulated boards which are constructed to insulate the sloping sides of your loft. These match throughout loft joists.  Good for lofts which have restricted head area 

Very efficient (excessive worth per unit thickness) 

Not eco-friendly  

Dearer than most different choices 

Can’t be used on structural parts 

Sure, for a assured DIYer 
Spray foam insulation  A layer of froth is sprayed from a particular machine over the areas that want insulating.  Eco-friendly  

Can enhance structural power of dwelling  

Good for laborious to entry areas of loft  

Highest R-values (the upper the R-value, the larger the insulating effectiveness)


Dearer than most different choices  

Require specialist set up  

Produced from polyurethane which comprises poisonous compounds 

Messy to put in / leaks by way of unsealed joints  

Prices, professionals, and cons of various loft insulation supplies  

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How lengthy does it take to put in loft insulation? 

Picture of a man in white protective clothing installing loft insulation
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Most loft insulation installations take beneath a day and might be accomplished inside a few hours. Blanket installations take much less time than sheet installations, however you’ll be able to count on labour prices to be about the identical, particularly when you’re paying a day by day labour charge. 

It’s going to take longer than this to put in insulation when you’re doing it your self. 

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How a lot does it value to insulate a loft? 

Picture of a loft with window and loft insulation being installed
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Taking a look at common set up prices for a complete loft, you may pay round: 

  40m2 60m2 80m2 100m2
UK common  £920 £1,400 £1,860  £2,320
Prices to insulate a loft in numerous sorts of properties 

The larger your loft, the extra it’ll value to insulate, particularly if you find yourself having to pay for added providers, comparable to rewiring electrics. The kind of insulation you get can even have an effect on prices. The above examples embody the price of blanket loft roll insulation.

To seek out out the costs for various insulation sorts, tell us what you take into consideration by chatting with a talented tradesperson at the moment.


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Can I insulate my loft myself?

Picture of a person installing loft insulation in their home
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In the event you do wish to set up insulation your self, then the above prices will provide you with a way of how a lot supplies will set you again. Although some forms of insulation might be put in DIY, professionally put in insulation lasts longer, and is usually simpler.  

Since insulation is put in primarily to be as cost-saving as doable, we advocate you rent an expert, until you might be assured you’ll be able to insulate your loft correctly your self. 

In the event you do wish to do it your self, it is best to preserve just a few issues in thoughts: 

  1. Ensure that the wiring in your loft is stored above the insulation. In case your wires are getting stretched due to your new insulation, then it is best to rent an electrician to reroute them. 
  1. You must clear your loft and clear it of any stuff that’s being saved there earlier than you start insulating, no matter whether or not you wish to DIY or rent a loft insulation installer. 
  1. Don’t overlook about your pipes and tanks. These will must be insulated as properly to stop them from freezing. 
  1. If you wish to use your loft as a space for storing, then you definitely’ll want to put boards over your joists. If you wish to convert your loft right into a room, you’ll want to rent professionals to do that. 
  1. Don’t use lower than the beneficial quantity of insulation. The federal government recommends insulation of 270mm thickness. Utilizing a thinner measurement will value you cash in the long term, as a result of your much less environment friendly insulation will increase your vitality payments. 
  1. Be sure you don’t cowl any vents while you lay down your insulation. Your loft must be correctly ventilated to keep away from damp from growing. If there aren’t sufficient vents in your loft, it’s possible you’ll have to have extra ones put in. In the event you do have numerous damp issues, then we advocate you don’t decide to DIY, as you’ll want an expert to assist repair this earlier than your insulation is put in. 
  1. To calculate how a lot insulation you’re going to want, you’ll want to know the ground space of your loft (size x width), and the depth of insulation you have already got.  Figuring out the joist heights in your loft can be a good suggestion, to be able to know whether or not to put the primary layer of insulation between joists. Don’t fear about your previous insulation, you’ll be able to lay new insulation over it (simply be sure you’re not squashing it down).  

Utilizing 100 mm thick insulation rolls with a 8.3 m2 protection, you’ll be able to calculate what number of rolls you’ll want by doing: Space (in sq m) x (1 – 0.1) ÷ 8.3 sq m. That is the equation you want for laying a base layer (25mm or much less of present insulation). If you wish to add a high layer over an present layer of insulation (for example 100mm), the equation can be: Space (in sq m) ÷ 6.47 sq m (utilizing 170mm rolls with a 6.47 m2 protection). 

DIY loft insulation set up will prevent from having to rent an installer however may imply your loft can be much less energy-efficient than it might be. 

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Loft insulation labour prices

Picture of a seated tradesperson in a white protective suit and mask insulating a loft
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If, then again, you wish to rent somebody to insulate your loft for you, to be able to guarantee all the pieces is completed appropriately and also you maximise the warmth retention in your house, then you are able to do so right here.


The common loft insulation prices round £450 and £1,200 (labour prices solely) for the complete mission. How a lot you find yourself spending is determined by the scope of your mission, and the place you reside within the UK.  

Labour prices rise in London and the South East, generally by as a lot as 20% extra on common. 

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Further prices

Picture of a tradesperson in a loft
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  • It prices about £5 – £8 per metre to insulate pipework (supplies and set up) 
  • It prices about £150 to insulate a water cistern held in your loft 
  • You might also have to relocate electrical wires in the course of the insulation. An electrician will cost round £250 a day to do that 
  • A loft ladder and hatch will value round £350 (supplies and set up) for an present opening. You’ll should consider one other £250 when you’re trying to construct a brand new opening to your loft 
  • In the event you want new loft legs (stilts), it’ll value round £600 for a median loft, utilizing chipboard. This may take roughly a day to do


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A correctly insulated loft can significantly scale back your vitality payments, serving to to make your house extra eco-friendly by decreasing your carbon footprint as properly. 

How a lot you find yourself spending will rely on the kind of insulation you determine to get, and the place you reside within the UK, as value of labour rises in London and the South East. The scale of your loft can even impression on prices. 

To get a extra correct sense of how a lot you may pay for loft insulation, we advocate you ask for a number of quotes earlier than you decide on a worth. You possibly can rent a talented insulator right here.


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