SuperFOIL Insulation — Maximum Performance, Minimum Thickness

Advanced multifoil technology delivers outstanding thermal performance in a fraction of the thickness of traditional insulation, making it ideal where space is at a premium.

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£500

Potential annual savings

Typical cost: £400 – £800

As energy prices remain elevated with electricity at 24.67p/kWh, UK homeowners are searching for insulation solutions that deliver real performance without sacrificing living space. SuperFOIL multifoil insulation addresses this need by combining multiple reflective layers to block radiant heat loss. For homes where traditional thick insulation is impractical — such as loft conversions, thin-walled extensions, or rooms in the roof — SuperFOIL offers a space-saving alternative that can cut heating bills by up to £500 per year.

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Potential annual saving

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Typical installation cost

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What Is SuperFOIL?

SuperFOIL insulation is a multifoil insulation product consisting of multiple layers of reflective foil separated by wadding or foam. It works by reflecting radiant heat back into the home while also providing a barrier against conductive and convective heat loss. At just 40mm thick, it can achieve thermal performance comparable to much thicker traditional insulation when installed with appropriate airspaces.

How It Works

Assessment

A surveyor evaluates your property to determine the best application — loft, walls, or roof — and checks for any structural considerations.

Surface Preparation

The installation area is prepared, ensuring surfaces are clean, dry, and ready to receive the multifoil product with correct airspace gaps.

Installation

SuperFOIL sheets are stapled or fixed to rafters, joists, or wall studs. Joints are overlapped and sealed with foil tape to create a continuous reflective barrier.

Finishing

Plasterboard or other finishes are applied over the insulation, maintaining the required airspace for optimal thermal performance.

Is It Right for My Home?

SuperFOIL insulation is suitable for most property types, including detached, semi-detached, and terraced homes. It is particularly well suited to loft conversions, rooms in the roof, extensions, and situations where wall or rafter depth is limited. It can also be used alongside traditional insulation to boost overall performance. Professional installation is recommended to ensure correct airspaces and sealing.

Key Benefits

Space Saving

At just 40mm thick, SuperFOIL takes up a fraction of the space required by traditional mineral wool insulation, preserving valuable room dimensions.

High Thermal Performance

Multiple reflective layers block up to 95% of radiant heat loss, delivering excellent thermal resistance in a slim profile.

Versatile Application

Can be used in lofts, walls, roofs, floors, and extensions — one product for multiple insulation needs across your home.

Moisture Barrier

The foil layers act as a vapour barrier, reducing the risk of condensation and damp within the building fabric.

Lightweight and Clean

SuperFOIL is non-irritant, non-allergenic, and easy to handle — unlike fibreglass or mineral wool which can cause skin irritation.

Long Lifespan

Multifoil insulation does not sag, settle, or degrade over time, maintaining its performance for the lifetime of the building.

Cost Breakdown

Our partner network means you'll typically pay less than these averages.

Property Type	Typical Cost	Annual Saving	Payback
Detached	£650 – £800	£500	1–2 years
Semi-Detached	£500 – £650	£350	1–2 years
Terraced	£400 – £550	£250	1–2 years
Bungalow	£550 – £700	£400	1–2 years

Government Grants Available

ECO4

Some multifoil insulation products qualify under the ECO4 scheme when used as part of a whole-house approach. Eligibility depends on product certification and household circumstances.

Check Eligibility →

Warm Homes Plan

The Warm Homes Plan may fund insulation upgrades including approved multifoil products for eligible low-income households.