Room In Roof Insulation An Ultimate Guide

In the chilly and wet winters of Scotland, ensuring your home is snug and energy-efficient is vital. A good way to achieve this is through room-in-roof insulation. Not only can it transform your loft space into a cosy room, but it also plays a key role in reducing lofty heating bills.

If this sounds like a viable option for your home, then dive into this guide to understand the ins and outs of room-in-roof insulation. Scotland and UK homes in general are about to get a lot warmer.

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What is Room in Roof Insulation?

Room-in-roof insulation is a good solution for those who are looking to maximise the comfort and functionality of their homes. In short, this type of insulation is fitted in the space right under your roof, commonly referred to as the ‘room in the roof’. Unlike standard loft insulation, which focuses on keeping the loft floor warm, room in roof insulation ensures the entire roof space is cosy.

This means that if you have transformed your attic into a liveable area – perhaps a bedroom or study – that is accessed via a fixed staircase, this insulation ensures it stays warm in winter and cool in summer. It’s a step beyond traditional loft insulation and caters specifically to homes where the attic is more than just a storage space.

By investing in room-in-roof insulation, you’re ensuring that your entire home, right up to the rafters, is energy-efficient and comfortable.

How Does Room in Roof Insulation Work?

Room in roof insulation is like wrapping your home in a cosy blanket, ensuring warmth stays in and cold stays out. But how does it work?

At its core, this insulation technique focuses on the loft room space, particularly the sloping parts of the ceiling and sometimes the walls. By using specially designed insulation boards and other insulation materials, the room is shielded from the external elements, while the barrier ensures that heat does not escape.

When the outside temperature drops, we tend to increase the warm air inside our homes. Without proper insulation, this warm air can easily escape through the roof, leading to chilly rooms and higher energy bills.

With room-in-roof insulation, this warm air is trapped inside, ensuring a consistent and comfortable temperature. The materials used, like insulation boards, are designed to prevent heat loss and keep the cold out.

Investing in this type of insulation could save you a significant amount on your energy bills in the long run. By keeping the warmth where it belongs – inside your home – you will use less energy to heat your space, leading to savings.

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How To Tell If You Already Have Room in Roof Insulation

Wondering if your home already boasts room in roof insulation? It’s a common query, especially for those who have moved into homes with existing attic rooms.

Here’s a simple way to check. First, you need to inspect your attic or the room in your roof. If it’s just the floor that’s insulated, you likely have standard loft insulation. However, if the sloping sides of the ceiling and possibly the walls have a layer of insulation, then you’re looking at the room in roof insulation.

Another clue is the material used. If you spot insulation boards or specific materials attached to the rafters or walls, that’s a good sign. To make sure, you could also hire a professional to inspect the space. They can provide clarity and offer advice on any potential upgrades or improvements.

underfloor insulation

The Types Of Room in Roof Insulation

Mineral wool insulation

One popular type of insulation for roof spaces is mineral wool. This insulation material is fluffy and fibrous, resembling cotton candy. It’s a great choice for filling in gaps and spaces, especially between rafters. Mineral wool is effective in trapping heat, ensuring your home stays warm.

Rigid insulation boards

For sloping ceilings, rigid insulation boards are a top pick. Made from materials like polyurethane or polystyrene, these boards are firm and provide a solid layer of insulation. They’re often used in conjunction with other insulation materials to ensure comprehensive coverage. Their sturdy nature makes them ideal for areas that need a more robust insulation solution.

Standard loft insulation

While the focus is on room in roof insulation, it’s worth mentioning standard loft insulation. This insulation is typically laid on the floor of the loft, acting as a barrier to prevent heat from escaping through the roof. It’s a common choice for homes where the loft isn’t used as a living space.

Multilayered insulation

This is a more modern approach that combines multiple layers of insulation materials to maximise heat retention. It often involves a combination of mineral wool, rigid boards, and other materials, ensuring every inch of the roof space is insulated.

Choosing the right type of insulation for your home depends on various factors, including the structure of your roof and your specific needs. Always consult with a professional to determine the best option for your home needs.

Advantages of Room in Roof Insulation

Incorporating room in roof insulation is a step towards a cosier, more energy-efficient home. Whether you’re considering a loft conversion or simply want to make sure your home is as warm as possible, this insulation is a top choice.

Boosted energy efficiency

One of the standout benefits of room-in-roof insulation is its enhanced energy efficiency. By preventing heat loss, homes require less energy to maintain a cosy temperature. This not only reduces the strain on heating systems but also contributes to a smaller carbon footprint.

Transformed living space

If you’re considering a loft conversion, room in roof insulation is a game-changer. It ensures that the transformed space is as comfortable as any other part of the house. Whether it’s a new bedroom, study, or playroom, insulation will ensure that it’s a living space you’ll love to spend time in.

Savings on energy bills

Nobody likes hefty energy bills. With proper insulation, homes retain more heat, meaning less energy is consumed warming up your home. Over time, this can lead to noticeable savings on your energy bills, making insulation a smart financial decision.

Versatile loft use

With room-in-roof insulation, you have the option of additional room space or storage. It offers flexibility, allowing homeowners to make sure they’re maximising every inch of their property.

Reduced carbon footprint

In today’s eco-conscious world, reducing our carbon footprint is vital. Insulating your roof space means your home requires less energy to stay warm, leading to fewer carbon emissions.

Protection against heat loss

Heat loss can make homes chilly and uncomfortable. Room in roof insulation acts as a barrier, ensuring the warmth generated inside your home stays put.

How Much Does Room in Roof Insulation Cost?

On average, room in roof insulation can range from £1,500 to £2,700. Although this might seem like a significant upfront cost, proper insulation can lead to reduced energy bills, making it a worthy investment in the long term. There are a few factors which can impact the cost of loft insulation which include:

Materials and type

The primary cost factor is the type of insulation you choose. Traditional loft insulation, like mineral wool, might be on the lower end of the price spectrum. However, if you opt for rigid insulation boards, which are known for their durability and effectiveness, the cost might be a bit higher.

Size of the space

The size of your roof space plays a significant role in determining the cost. A larger area will naturally require more materials and potentially more labour, leading to a higher overall price.

Labour costs

Installation costs can vary based on your location and the complexity of the job. While some homeowners might consider a DIY approach to save on labour costs, it’s always recommended to hire professionals to ensure the insulation is installed correctly.

room in roof insulation

Are There Grants For Room in Roof Insultation?

The cost of insulating your roof space can sometimes be a deterrent for homeowners. However, the good news is that there are grants available to help offset these costs, making loft insulation more accessible.

One such initiative is the ECO 4 scheme, which aims to ensure that the homes of the vulnerable and those living in fuel poverty are energy-efficient. In turn, this leads to reduced energy bills and a more comfortable living environment.

Under the ECO 4 scheme, eligible homeowners can receive free loft insulation. This not only helps in reducing the initial cost of installation but also ensures that the insulation is done by professionals, guaranteeing quality and adherence to safety standards.

If you’re considering loft insulation, it is worth checking if you qualify for this grant. The benefits are twofold: You save on installation costs and start reaping the benefits of reduced heating bills from day one.

Qualification criteria for ECO 4 grant

  • Homeowner status.
  • Your existing insulation thickness is less than 100 mm.
  • The property falls under certain energy efficiency ratings.
  • You are a recipient of specific government benefits or schemes.
  • The property is in a designated vulnerable or fuel poverty area.

These could be subject to change, so always check with an ECO 4 scheme specialist, such as Envirohomes Renewables, for detailed and updated criteria.

How Long Does Room in Roof Insulation Last?

Room in roof insulation is a long-term investment that is designed to serve your home for many years. On average, loft insulation materials, when installed correctly, can last for over 40 years. This means that once you’ve insulated your roof space, you can enjoy the benefits of a warmer home and reduced energy bills for decades.

Insulation maintenance

While loft insulation is durable, it’s essential to occasionally check its condition. Over time, some areas might get compressed or disturbed, especially if you frequently access your attic. Ensure that the insulation material remains evenly spread and retains its thickness. If you spot any dampness or mould, it’s crucial to address it promptly, as moisture can reduce the insulation’s effectiveness.

Regular checks and minor touch-ups will ensure your insulation remains in top shape, offering maximum benefits throughout its lifespan.


Mineral wool is often the most cost-effective option for roof insulation. It’s easy to install and provides good thermal resistance. However, for long-term savings and efficiency, investing in quality materials and professional installation is recommended.

While DIY installation is possible, it’s not always advisable. Proper installation ensures maximum benefits and safety. Hiring professionals guarantees adherence to building regulations and optimal insulation performance.

The best insulation depends on your roof’s structure and needs. Rigid insulation boards are popular for their durability, while mineral wool offers flexibility for various spaces. Multilayered insulation combines different materials for maximum heat retention.

In Scotland, while many homeowners are aware that they may have some loft insulation, many might not know the depth recommended by the Energy Saving Trust and current Building Regulations. The recommended insulation depth is 270 mm. If the insulation is level with or below the rafters’ height, topping it up can enhance your home’s energy efficiency.


Room-in-roof insulation is a transformative step for homeowners. Whether you aim to use your loft as an extra living space, plan a loft conversion, or simply wish to enhance your home’s energy efficiency, this insulation is pivotal.

It’s an effective solution to combat heat loss during chilly winters. By insulating the room in your roof, you not only create a more comfortable environment but also make significant savings on energy bills. This method is especially beneficial for older homes needing upgrades. With the longevity and benefits of loft insulation, it’s a wise investment for any home, ensuring comfort and warmth for years to come.