How much does Attic Insulation Cost UK 2023?

Attic Insulation
On average, attic insulation costs are between £1 and £7 per square foot
Major Benefits of Attic Insulation
Pros and Cons of Attic Insulation
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Attic Insulation cost depends on the area size, like which type of home you want to insulate Detached, Semi-detached, or Terraced. And labour costs most tradespeople will charge a day rate of around £250 for installation.

What is Attic Insulation Made Of?

Attic insulation can be made from a variety of materials, including:

  1. Fiberglass: This is a common type of insulation made from melted glass that is spun into fine fibers. Fiberglass insulation is available in batts or loose-fill form and is often used in attics.
  2. Cellulose: This is a type of insulation made from recycled paper products, such as newsprint or cardboard. Cellulose is typically blown into an attic space using a machine.
  3. Mineral Wool: This type of insulation is made from natural minerals such as basalt and slag. It is available in batts or loose-fill form and is known for its fire resistance.
  4. Spray Foam: Spray foam insulation is made from a mixture of polyurethane and other chemicals that expand and cure to form a solid foam. It can be sprayed into attics to provide a seamless and airtight insulation solution.
  5. Natural Fiber Insulation: This type of insulation is made from natural materials, such as sheep’s wool or cotton. It is typically available in batts and is a more sustainable and eco-friendly option.

The type of insulation used in an attic will depend on several factors, including the specific needs of the building, budget, and personal preferences.

How to insulate an attic?

  • Finely clean the attic room and use the desired insulator so that all the equipment like rafters and vertical stud work is clearly visible.
  • Install the vapor membrane layer between the rafters by developing pockets where installation is to be made. Cover all edges with tape. Use big size material to avoid gaps
  • After the insulation process, pack it tightly to avoid any possible gap between rafters and the attic.

Major Benefits of Attic Insulation

There are several benefits of attic insulation which is given are
1. Reduce Energy Bills: attic insulation helps people to reduce their energy bills and save costs. less energy and greater retention = lower bills.
2. Energy Efficient: The costs of attic insulation reduce the cost of our carbon footprint.
3. Heat retention: there is a saying “better insulation equals better heat retention” it controls the risk and makes your home cosy which means less energy keeps your house warm.
4. Environment friendly: Attic insulation saves energy and protects the environment, it is to keep under control the energy in the home and makes your house environment friendly, and reduces pollution caused by power plants.
5. Save Money: If your home is insulated you will spend more energy on heating and cooling. During heating and cooling approx. 50% of energy used in UK’s homes, after insulating your home you can save an average of 30% on utility costs by air sealing and insulating your home’s attic space.

Attic Insulation Type

The various types of attic insulation available on the market with their pros and cons
1. Fiberglass Batt Insulation
2. Blown-in Fiberglass Insulation
3. Blown-in Cellulose
4. spray foam insulation

Pros and Cons of Attic Insulation

Pros and Cons of Attic Insulation

There are different kinds of attic insulation that is explained here.
Fiberglass Batt Insulation
Fiberglass batt insulation is highly appreciated by many people and consists of small glass fibers. This version of batt insulation comes in pre-cut sections that can be laid down wherever required.

One should be vigilant and wear protective eyewear, hand gloves, and face mask as it causes skin irritation before installing them. Let’s discuss both pros and cons of fiberglass batt attic insulation.


  • Cheap price
  • Easily Installed
  • Can be used in obstructed areas


  • Less effective in heat retention
  • Results into skin irritation sometimes

Fiberglass Roll Insulation
Similar to the above-stated insulation type with slight differences and comes in larger pieces. It consists of glass pieces compressed by plastic rolls easily transportable and can be broken down into desired lengths.


  • Best Suited for wide areas
  • Comes in different lengths falling between 20 & 40 feet
  • Fewer gaps leave behind
  • Advanced fiber Technology
  • Shed-resistant


  • Coverless area than batts insulation
  • Not so good at heat retention

Cellulose Insulation
This kind of insulation uses only recycled paper products for insulation. Sometimes ammonium borate is added to make it pest and fire-resistant and to create a better living space for your loved ones.  As cellulose is denser than other insulation materials, provides great heat retention in the winters.


  • Eco friendly
  • Denser than fiberglass
  • Highly resistant to fires and pests
  • Good soundproof insulation
  • Lowers heating and cooling cost


  • The entire installation process causes dust
  • Less utilized

Loose-Fill Fiberglass Insulation
Interestingly fiberglass is also made available in loose-fill insulation form and requires special equipment to spread this material into the right place, hence handled by only insulator specialists.


  • Best suited for odd areas
  • Can easily fill wall spaces
  • Rapid installation


  • Requires special installation equipment
  • Not available in pre-cut pieces

Spray Foam Insulation
This type of insulation involves three types of plastic: polyurethane, polyisocyanurate, or polystyrene. It is simply installed by spraying it into foam boards.


  • The best insulating material in the market
  • Moisture barrier
  • Most preferred insulation type
  • Less time-consuming process
  • No mold or mildew formation
  • Prevent air leaks


  • Bit expensive insulation type.

Material Required for Attic Insulation

  • Wood fiber.
  • Layer for Vapor Control
  • Vapor permeable membrane.
  • Taping for Gapes
  • Timber battens.
  • Rafter trays.

How much does it cost to install insulation in the attic?

The rough cost of attic insulation will vary greatly depending on your location, the materials you choose, and the size of your space. According to insulation experts On average, attic insulation costs are between £1 and £7 per square foot, however, most homeowners may anticipate investing £1,500 for materials and labour.

You may save a lot of money by completing your own attic insulation, but you need to be extra confident in your abilities. Otherwise, you run the danger of performing a poor job and having to redo it later to remedy any problems.

Although installing attic insulation is DIY-friendly compared to many other home repair and updating chores, it may be a messy and (in some situations) dangerous operation

Large quantities of batt and blown-in insulation are being sold in home improvement centres, and insulation blowers are rented as well. Insulating your attic all by yourself rather than paying a professional will save you between £0.25 and £2.50 per square foot in labour costs, but you will also be required to learn how to block off the attic’s intake vents to avoid roof damage.

How to calculate Attic insulation Cost?

attic insulation cost

An attic insulation cost calculator, despite its complex appearance, is essentially rough mathematics that tells you how much insulation you’ll need to adequately insulate your home.

The cost of attic insulation depends on several factors, including the type of insulation used, the size of the attic, the location of the building, and the cost of labor.

It is important to note that the cost of attic insulation can vary greatly based on local labor rates, the complexity of the job, and the specific needs of the building. The initial investment in insulation can be offset over time by the energy savings it provides.

Insulation, in its most basic form, is any material sprayed in a home’s gaps or fissures to control heat movement. Heat escapes from your home during the frigid month of winter and rapidly enters your attic space during the hot summer months if you don’t possess sufficient insulation.

Follow the steps stated below to find out how much insulation you’ll need.

  • Firstly determine the size of your attic.

Measuring your attic space can be simple if your attic is square-shaped or rectangular-shaped.  Simply measure the length and width of your attic then just multiply those two digits to get the square footage of your attic.

You’ll definitely need to gauge the height and breadth of each triangle in your attic if it’s made up of triangular spaces. The area’s square footage is then calculated by dividing the base in half and multiplying it by the triangle’s height.

  • Determine the current level of insulation

You won’t be able to measure old insulation if your attic isn’t insulated. However, if you already have insulation, measure it from the attic floor to the top of the insulation. With this knowledge, you’ll be able to estimate how much extra insulation you’ll need to increase your energy efficiency.

Consult the Department of Energy’s insulation chart if you’re unsure how much more insulation you’ll need.

  • Calculate

Simply divide the square footage of your attic by the square footage of insulation in the manufacturer’s packaging (assuming you’re buying pre-cut batts or rolls) to figure out

how much insulation to buy. This will give you a general estimate of how much quantity of insulation you will need and how much quality insulation would cost. You now have access to an attic quantity calculator that is both simple and effective.

Also More Query

What type of insulation is used for the Attic?

The simplest DIY insulating material is blanket insulation which is an ideal option for attic spaces. It comes in natural fibres, synthetic fibres, fibreglass, and mineral wool. For attics with little barriers and unreached beams and shafts, this kind of insulation works best. Attics with limited height and numerous barriers, such as cross beams and vents, are ideal for adding loose-fill insulation. It comes in fibreglass, cellulose, and mineral wool and can be successfully blown over existing insulation. The most efficient material is cellulose, which has an R-value of 2.2 to 3.8 per inch, but might get mouldy if exposed to moisture.

How to find the best Attic Insulation Installers near you?

It may seem difficult to choose trustworthy insulation installers, but if you already know where to look, you can pick a qualified and experienced contractor. Here are some tips to help you choose the best insulation provider. Obtain at least three quotes for the insulation work that your property requires. Ask potential contractors if they are licenced in the region you are in and if their licences are up to date before hiring them. Some states demand that they possess individual, contractor, or business licences. Lastly, ask them whether they provide a warranty in case of any mishap.

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