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Multifoil Insulation

(39 products)

Multifoil insulation is a DIY friendly product that is ideal for roof insulation, solid wall insulation, external wall insulation and roof insulation. Made from reflective layers sandwiched between insulating loft quilt, it has a comparatively slim profile whilst retaining effective thermal insulating performance. Shop all the most popular brands of multifoil insulation such as SuperFOIL, Superquilt and TLX Gold/Silver.

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Frequently Asked Questions

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What is Multifoil Insulation?

Multifoil insulation is a high-performance, multi-layered material designed to provide exceptional thermal efficiency by reflecting radiant heat. It combines several layers of reflective foil, foam, and wadding to create a lightweight and versatile insulation solution. At DIY Building Supplies, our multifoil insulation products offer a cost-effective and space-saving way to enhance energy efficiency in your home or commercial property.

Why Choose Multifoil Insulation?

Multifoil insulation delivers numerous advantages, making it a popular choice for a variety of projects:

  1. Exceptional Thermal Performance: Reflects radiant heat to maintain comfortable indoor temperatures year-round, reducing energy consumption.
  2. Space-Saving Design: Its thin, multi-layer construction makes it ideal for areas where traditional bulky insulation might not be suitable.
  3. Lightweight and Flexible: Easy to handle, cut, and install, multifoil insulation is perfect for DIY enthusiasts and professionals alike.
  4. Moisture and Vapour Resistance: Acts as a barrier to moisture and vapour, helping to prevent condensation and improve the durability of your building.
  5. Versatility: Suitable for walls, roofs, floors, and even irregularly shaped spaces, providing a comprehensive insulation solution.
Applications of Multifoil Insulation

Multifoil insulation is incredibly versatile and can be used in various settings, including:

  • Roof Insulation: Ideal for both pitched and flat roofs, enhancing thermal efficiency while saving space.
  • Wall Insulation: Suitable for timber frame, solid, and cavity walls to improve energy performance.
  • Floor Insulation: Provides effective underfloor insulation with minimal thickness.
  • Loft Spaces: Perfect for insulating lofts without reducing usable space.
  • Sheds and Garden Rooms: Offers an easy-to-install solution for insulating outbuildings and other non-traditional spaces.
How to Install Multifoil Insulation

There are many different methods to correctly installing Multi Foil insulation due to it’s variable uses, but one common technique used to insulate solid walls is to apply horizontally over battens secured to the wall, using staples or a nail gun to secure the insulation rolls. Each layer is overlapped and sealed with Insulation tape to form an airtight seal. It is then finished with counterbattens to ensure an air gap and a secure fit. In pitched roofing and over-joist flooring, a similar method is used. 

Benefits of Multi Foil Insulation

Multi Foil insulation is an innovative product with a variety of benefits that set it apart from other types of insulation. It’s biggest benefit is that it provides comparatively effective thermal insulation, with a much slimmer form factor than other types of insulation. This can be really helpful in situations where traditional forms of insulation would impact the available floor space  - particularly in solid wall conversions such as garages and garden rooms, or in van conversions or small loft conversions. 

Due to it’s slim form factor and general versatility, it’s also a very DIY-friendly product that can be cut with insulation scissors or a sharp utility knife, and attached with standard tools such as staples or a nail gun. 

Not only that, but due to it’s reflective and flexible nature, many types of multi-foil insulation serve a dual purpose as radiant barrier - actively reflecting heat back into the property and away from the property (keeping it cool in summer as well as warm in winter) - and as a vapour barrier when fitted with an airtight seal. 

Why Choose Multi-foil Insulation for Your Project?

Multi-foil insulation represents a breakthrough in building performance, combining multiple reflective layers with high-performance core materials to create unparalleled thermal efficiency. Unlike conventional insulation, multi-foil systems work by reflecting radiant heat whilst providing excellent resistance to conductive and convective heat transfer.

The benefits speak for themselves:

  • Superior thermal performance - achieve impressive U-values with thinner profiles
  • Moisture control excellence - integrated vapour barriers prevent condensation issues
  • Space-saving design - maximise internal space without compromising performance
  • Versatile application - suitable for roofs, walls, and floors across residential and commercial projects

Expert Solutions from Trusted UK Manufacturers

At DIY Building Supplies, we partner exclusively with leading British manufacturers like SuperFOIL, YBS, and TLX to ensure you receive products that excel in our challenging UK climate. These industry pioneers have developed multi-foil solutions specifically engineered for British building standards and weather conditions.

Our SuperFOIL range includes the popular SuperFOIL SF19BB, delivering exceptional thermal performance at just 35mm thickness. For projects requiring enhanced acoustic properties, the YBS SuperQuilt provides outstanding sound reduction alongside superior insulation values.

Professional Guidance When You Need It

Choosing the right multi-foil insulation involves understanding your specific application requirements, structural considerations, and building regulations compliance. Our experienced team provides detailed technical support, helping you specify the optimal solution for your unique project needs.

Whether you're tackling a loft conversion, new-build construction, or renovation project, we'll ensure you select the right product with confidence. From U-value calculations to installation guidance, we're here to support your success.

Quality You Can Trust, Service You'll Recommend

Every multi-foil insulation product we stock undergoes rigorous quality assessment, ensuring consistent performance and reliability. We understand that your project's success depends on materials that perform as promised - that's why we only partner with manufacturers who share our commitment to excellence.

Ready to experience the difference? Browse our complete multi-foil insulation range below, or contact our technical team for personalised product recommendations. With nationwide delivery across mainland UK and competitive pricing on all premium brands, getting the right insulation for your project has never been easier.