The Room in Roof Insulation Guide


If you would like your loft room or loft conversion to be warmer, you might need room in roof insulation. Loft rooms, or literally rooms in your roof, can get especially chilly in the winter or overly warm in the summer. To keep your loft warm and lower your energy bills, consider a room in roof insulation. Plus, you may be able to get roof insulation at no cost to you with a government grant.

What is room in roof insulation?

More traditional types of insulation come in the form of mineral wool or PIR board. Installing this involves fitting insulation between your home’s rafters or behind the plasterboard in walls. Roof insulation traps heat inside while protecting from the cold outside. You can use room in roof insulation to insulate both the ceiling and walls of a loft room.

Room in roof insulation boards are typically comprised of polystyrene or polyurethane, both effective heat-trapping materials. At TLX insulation, our TLX Silver insulating vapour barrier can be used in loft conversions, which provides airtightness and prevents the risk of condensation while reflecting heat back into a space. Simply laid underneath the rafters and secured with 38x38mm battens, it is quick and easy to install.

Why do you need room in roof insulation?using multifoil insulation to convert a loft into a room

Uninsulated homes can lose up to 25% of their heat through the roof! Roof insulation could save you up to £150 every year on heating bills. If you want to retain that heat and save money on energy bills, then roof insulation is the easiest solution. If you already have converted a loft into a room, then a professional room in roof installer can cut the insulation to the exact size needed in your space. Room in roof insulation will also increase the value of your home and the livability of a space, making it feel more like home. Plus, loft insulation can last for up to 40 years.

Benefits of room in roof insulation

  • Keeps your space warm and comfortable
  • Prevents heat from escaping
  • Reduces your energy bills
  • Easy and quick to install
  • Increases your home value and livability

Room in roof insulation costs and savings

Room in roof insulation costs anywhere from £1500 - £2700, depending on the type of home and size of the space. For detached houses and bungalows, loft insulation will be more expensive than semi-detached houses and mid-terraces homes, for instance. However, it can also save you up to £225 a year on your energy bills. So, in a few years to a decade, it almost pays for itself. Roof insulation can be expensive, but with the money you save it will pay off over time, especially considering a roof insulation can be effective for several decades.

Are there any government grants for room in roof insulation?

Yes! There are government room in roof grants that will cover the installation costs of roof insulation. You can apply for a grant to get 100% of the room in roof insulation installation covered as part of the Government’s Energy Companies Obligation plan.

If you have an older building with a loft or attic that was built without roof insulation, or with inadequate or outdated insulation, you can get a grant to cover a roof insulation upgrade. In some cases, you may need to pay a small fee, but it will be nothing compared to the full cost of installing room in roof installation.

How to apply for government grants for room in roof insulation installation

To apply for a roof insulation grant, you will need to fill out an online form and take an online survey. Then, you will get your insulation installed and receive a grant to cover it.

Who qualifies for a government grant for roof insulation?

Qualified individuals for a room in roof insulation grant include those who fill out the survey and get approved, and those on disability or income benefits like the following:

  • Armed Forces Independence Payment
  • Attendance Allowance
  • Carer’s Allowance
  • Child Benefit*
  • Child Tax Credit
  • Constant Attendance Allowance
  • Disability Living Allowance
  • Income-Based Jobseekers Allowance
  • Income-Related Employment Support Allowance
  • Income Support
  • Industrial Injuries Disablement Benefit
  • Pension Guarantee Credit
  • Personal Independence Payment (PIP)
  • Severe Disablement Allowance
  • Universal Credit
  • War Pensions Mobility Supplement
  • Working Tax Credit

However, there may also be a limit for household income as well as restrictions on rental properties. Find out if you qualify at

How to prepare for room in roof insulationMultifoil insulation loft conversion

Before you get a room in roof insulation, you will need to completely clear out the room before professionals are able to do their work. Ensure you are able to leave the room in their capable hands to allow them the space needed to complete their work.

Also make sure to seal off any air leaks around windows pipes, chimneys, wires, and ducts that would allow air to escape, before you install roof insulation. Additionally, fix any roof leaks, box off light fixtures, and wear dust masks for your personal protection the installation.

Note that if your loft is damp or has condensation problems, it may be difficult or impossible to install roof insulation. If your loft has a flat roof or is hard to access, you will want to leave the job to the pros.

Room in roof insulation: DIY vs professional installers

It’s difficult to install room in roof insulation on your own because you need to cut the insulation to the right size and place it between your rafters and behind plasterboard walls. Improper installation could mean your loft is not insulated properly, allowing heat to leave and/or cold to get in. If you’re not highly experienced in the area, it’s best to leave it to the professionals.

Additionally, if your loft is hard to access, or has a more complex roof, it may be difficult to do it yourself. For instance, flat roof insulation should always be left to the professionals.

Professionals will also be able to ensure that the ventilation is installed correctly, and they will likely get the job done much faster and more efficiently. If you’re considering roof insulation, then consider a multifoil insulation from TLX insulation.

What is multifoil insulation?

Multifoil insulation is an insulation made of layers of foil and wadding and is thinner than traditional insulation so that it’s easier to install on walls or ceilings. It is also known as foil insulation. These layers maximize thermal efficiency by preventing heat loss and reflecting heat back into a space.

There are plenty of different roof insulation materials, but multifoil insulation is great for your loft or attic because it provides complete airtightness and is effective in keeping your space at the optimum temperature.

TLX Insulation

At TLX, our multifoil insulation reflects heat back into your home in winter and controls the amount of solar radiation entering your building in the summer, making it the ideal insulation to control hot and cold temperatures and maintain a comfortable internal environment all year round.

We have over 15 years of experience and R&D behind our multifoil insulation and have designed the optimal thickness for performance. Our multifoils hold British Board of Agreement (BBA) certifications, and we hold LABC and UKCA assessments and certifications, assuring you that we have tested our products to the highest standards, and they are reliable and effective.

Our TLX Silver multifoil insulation has the lifespan of your roof in which it sits and can help insulate your loft conversion, extension, walls, flat roof, new build or even DIY projects such as a shed or garage.

Get Room in Roof Insulation Today

You could keep layering up with warm sweaters to make your cold loft bearable, or you could just get room in roof insulation to warm up your space and save money on energy bills at the same time.

Do you still have questions about room in roof insulation? We've got the answers... just ask! Our technical specialists will be happy to assist you in finding the right build up to meet your individual requirements. Call us at 01204 674 730 to learn more.

Read our case studies which demonstrate the above principles in practice

We have written another blog related to this subject which you can read HERE

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