Ultimate Guide to Loft Insulation UK in 2024: Expert Tips & Advice

loft insulation

Loft insulation refers to the material installed in the space between the roof and ceiling of a building to regulate temperature by reducing heat loss. It helps maintain warmth in winter and coolness in summer, enhancing energy efficiency and comfort. Loft insulation reduce the amount of heat lost through the roof, therefore lowering energy bills. Without Loft Insulation, approximately 25% of all the heat of your home gets lost through your roof.

The installation costs of loft insulation are forecasts that are not subsidised and might vary significantly. If you hire a professional to complete the task for you, your bill will increase eventually.

If your loft is dry, accessible, and has joists that are evenly spaced, the cheapest and most straightforward way to insulate it is either with spray foam or with rolls of blanket roof insulation placed between the joists. Only a professional like Home Insulation Contractors can install spray foam and they will blend the material at your house.

A chemical reaction when combined produces thick liquid foam that is sprayed out using a highly specialised applicator. The foam quickly fills in gaps and then quickly contracts to form a thick blanket. Spray foam insulation is beneficial for your loft health because it is:

  • resistant to bacteria, mould, and mildew
  • makes a seal that is airtight
  • a long lifespan
  • simple to install
  • acoustic properties

How Much Does Loft Insulation Cost?

“The cost of loft insulation in the UK is between £20 and £50 per square meter, for spray foam insulation depending on the thickness and complexity of the installation.”

The loft insulation UK cost is likely to be a crucial consideration when searching for loft insulation. But, this is not always a straightforward question. Many different factors come into play when trying to figure out how much does loft insulation cost? So there is no exact answer to this question without getting a quote. When calculating how much your new loft insulation installation will cost, you will also need to factor in additional costs, such as the following:

  • The size of the area that you need to be insulated.
  • How easy the area is to access.
  • The amount of time that the job will take.
  • Whether existing insulation needs to be removed first.

As well as the factors above, you will need to consider which type of insulation you should use and what are the costs of different loft insulation materials? Once you understand the costs involved, it will be easier for you to decide on the insulation material you want to use.

Loft Insulation Cost per m2

£20 to £50/m²Terraced house£125 to £160£180 to £225£250 to £310£1,375 to £1,720£150 to £300 per day3 to 4 hours
£15/m² plus the cost of installationSemi-detached house£200 to £250£290 to £360£400 to £500£2,200 to £2,750£150 to £300 per day3 to 4 hours
semi-detached three-bedroom (cost over £1,000 to insulate)Detached house£300 to £375£430 to £540£600 to £750£3,300 to £4,125£150 to £300 per day4 to 6 hours

Types of Loft Insulation

There are different types of loft insulation in the UK to choose from.

Spray foam insulation- Spray foam insulation is a type of loft insulation that typically costs around £55 per square meter in the UK.

Sheet loft insulation- Sheet loft insulation is a type of loft insulation that typically costs around £15 per square meter in the UK.

Loose-fill loft insulation- Loose-fill loft insulation is a type of loft insulation that typically costs around £7.50 per square meter in the UK.

Blanket loft insulation- Blanket loft insulation is a type of loft insulation that typically costs around £5 per square meter in the UK.

For the past 30 years, spray foam insulation has been used, and recently, this form of insulation has become increasingly popular. The main reason for spray foam insulation’s popularity is that it offers many advantages over other materials. Many people rule out using spray foam insulation as it is often considered a more expensive option when compared with the more traditional insulation materials. However, this is not always the case.

Ask your installer about the content and structure and stay away from formaldehyde. Some spray foams are environmentally friendly and emit no toxic gases.

Loft Insulation – How Does It Work?

Loft Insulation cost uk

Rolls of mineral fiber or foil-backed felt are used to insulate most of the lofts. These serve as blankets and can retain warmer air within your home. At times, mineral wool or spray foam can be sprayed into areas that are tougher to access. Out of all available insulation types, spray foam loft insulation is gaining a lot of traction among UK homeowners as it provides many benefits as compared to others.

Generally, insulation is set up between loft joists. It can prevent the rise of heat in your home to the loft. It can be easy and fast for you to set it up on your own if DIY is what you are interested in. Such kind of insulation is referred to as ‘cold loft’ insulation but does not provide 100% proper insulation to your loft.

In case you opt for a loft conversion or would like to keep the loft in your home heated, you may fit the insulation to your roof inside. It is referred to as ‘warm loft’ insulation. However, this is slightly trickier to perform, and it is possibly better that you let a professional handle it.

You may even opt for loose-fill insulation in case it is tough to access your loft from inside your home, or in case there are some corners that are difficult to reach. At DIY stores, you can find loose-fill insulation – some of which may be made of recycled newspapers or cork granules. Or you might like to get a professional use specialized equipment for the setup of spray foam insulation.

Loft Insulation – How Much Is Required?

Loft Insulation – How Much Is Required?

It is advisable that you get your loft insulated to as deep as recommended by building control. Even in case loft insulation uk cost is there already in your home, it can be a good idea to look at how much you have at present. This is because there has been a change in the guidelines. A little while ago, 100 mm insulation was regarded as sufficient. In case you have had such insulation for some time, you might be paying a lot still for household energy cost. With the addition of more insulation, it can be possible for you to save a lot of money.

Loft Insulation – How Does It Help Reduce Carbon Footprint?

Loft Insulation – How Does It Help Reduce Carbon Footprint

With Loft insulation, you can reduce carbon emissions in your home, as well as manage to save money. With the use of 270mm insulation in a detached home, annually 990 kg of CO2 can be saved – which amounts to the fuel expenses of one London – NY returns flight. You can save 550 – 580 kg of CO2 annually if you stay on a terrace or in a semi-detached home.

How Can a Loft Conversion Be Insulated?

How Can a Loft Conversion Be Insulated

In case you use your own loft like an extension of your living space, you need to get the roof inside insulated instead of the floor of the loft. “Warm Loft “or Roof insulation installation is costlier than it is the case with regular insulation. However, you can save much more money on heating expenses. This can help keep your loft warm and comfortable.

Recently, loft roof insulation is done by having spray foam installed between the rafters of roofs. As spray foam can cover every gap and crack in your roof, there will be no escape from warm air through the roof. It is more complex than regular home insulation contractors uk. Thus, it is possibly better that you spend on professionals to carry out the setup.

Loft Insulation Savings

The yearly loft insulation uk cost that can be found through the reduction of your energy bills varies accordingly. The correct insulation will save you hundreds a year and over time insulation will save you enough money to easily cover the costs of insulation.

Try not to underestimate the cost savings you can achieve in the form of energy bills when installed the right way. By using spray foam insulation for your lofts, you can save up to* 50% on your energy cost.

Loft Insulation: Dos & Don’ts

Loft Insulation Dos

Do make sure you take the service of an accredited and experienced organization to renovate or install your loft insulation.

Do take advantage of our free site survey and 12 months no obligation quote service to see how much you can save on your energy bills along with reducing your carbon emission. Simply click and we will arrange a FREE site survey at a day and time that suits you.

Do use spray foam insulation if your space is little or have tight spaces. Spray foam can be sprayed into tight corners and areas with the use of a hose and pressurized air, and you can, in any case, take advantage of spray foam loft insulation in the UK even in awkward spaces or just in general as it has so many advantages over other types of insulation.

Loft Insulation Don’ts

The loft insulation don’ts are crucial to keep in mind, as they help you save money and prevent you from harming your loft space, please keep in mind that loft insulation is not a DIY job.

With that in mind, please read these important instructions regarding what not to do when insulating your loft:

Don’t ignore the loft insulation guidelines regarding the necessary quality of insulation material and thickness. These guidelines are there for a reason and ignoring them will mean you could waste your money on insulation that isn’t and energy efficient and it doesn’t keep your home warm.

Do not do loft insulation on your own. It requires an expert and certified installer to do it. The removal of old insulation may expose you to harmful chemicals. Also, while doing spray foam insulation, you could be in harm’s way if you aren’t a skilled professional. Don’t use insulation materials that are NOT approved for use in loft spaces. Use only certified and accredited companies to recommend the correct insulation for your home.

How to Find Insulation Professionals?

How to Find Insulation Professionals

In case you require a professional for your roof/loft insulation, try to find a company that is fully accredited and licensed to carry out loft insulation services. Few of the accreditation you can check are BBA, Trustmark, KIWA, and more. You can also find our top reviewed insulation companies on checkatrade.com.

Many people like to go the DIY way to have their loft insulated, to get the job done without spending money on professional installation, but the job turns out to be sub-par in that way. Thus, it makes more sense to hire professionals who possess the tools, knowledge, technology, and experience to carry out a fast and proper loft insulation installation. Contact us today to get in touch with a fully accredited Home Insulation Contractor UK in your area.

If you do have any questions, please don’t hesitate to contact us.

Frequently Asked Questions

In the UK, the average cost of loft insulation is approximately £5 per square metre for blanket insulation, £7.50 per square metre for loose-fill insulation, and around £55 per square metre for blown-fibre insulation.
A fabric barrier inside the roof area serves as loft insulation. Insulation between the joists keeps the temperature warm in the living space below and generates a cold loft, whereas insulation between the rafters keeps the temperature warm in the roof space as well. Lower heating expenditures are another benefit of roof insulation. Having a functional loft can be a fantastic addition to any home. In the best case scenario, loft insulation acts as a warm hat for your home. Keeping the warm air in because, you don't have to use as much electricity to keep it warm. Some of the essential benefits of insulating your loft include: preventing heat loss, huge bill saving, great reduction in noise pollution, overall home value increases, eco-friendly surroundings.
Home insulation costs are soaring in the United Kingdom, but so are the costs of electricity and gas. The most crucial area of your house to insulate is the attic. Because temperature increases, many buildings have twice the amount of insulation in the main walls to prevent warm air from escaping. In attics, spray insulation foam is the most prevalent material, followed by blown-in insulation. The expense of insulating an attic ranges from £1,500 to £6,000. Roof insulation costs around £1,500 and £4,500 on average. The most popular type of insulation in houses is mineral wool or fiberglass batting. Spray foam or rigid board insulation can also be installed beneath the outside house siding in newly constructed homes. The cost of wall insulation will vary between £1 and £4 per square foot.
Insulation costs between £2,500 and £4,500 for a typical three-bedroom home in the UK. Expect to invest £8500-£15000 on external insulation plus render on a conventional 3-bed semi-detached home. Expect to pay between £5000 and £7000 for internal insulation & plastering. Insulating a three bed semi house is surely an easy task provided you hire only insulation experts or specialists for your compact house. If you reside in an older home, we recommend that you make sure your contractor recognizes the essence of ventilation and breathability.
You don't want to breathe in fiberglass or rock wool insulation because they're irritants. If you are attempting to eliminate the insulation, wear a mask and a cap to keep the threads out. It's also a good idea to change your clothes following the installation. There isn't a simple way to eliminate the insulation, so we recommend hiring a professional to do it for you. If you really must do it alone, you will be required to hire a skip because the dustman won't carry it away. If you must remove loft insulation, do so only if absolutely necessary; putting insulation on top will suffice. Removing the insulation might be dangerous, so if it's necessary, we recommend hiring an expert.
Insulating your home properly may make it more comfortable while also saving you cash on your energy expenses. Insulation is crucial because it helps to prevent heat transmission from your home's conditioned interiors to the unconditioned outdoors. During the summer months, when you use your air conditioning system on a hot day, your property will stay cooler for longer. In countries like the U.K, R-Value of 30 would provide more than adequate insulation while avoiding some of the drawbacks associated with excessive attic insulation. While reaching a R-Value of 30 is ideal, anything higher than 38 is likely overkill and excess in amount applied.

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