SuperFOIL SF19BB Breathable Multi-Layered Foil Insulation – 10m x 1.2m

SuperFOIL SF19BB Breathable Multi-Layered Foil Insulation is a high-performance 2-in-1 breathable multifoil insulation and breather membrane designed for roofs, external walls and cladding applications.

Unlike conventional multifoil insulation, SF19BB incorporates a reflective breathable membrane as its outer layer, while the layers beneath are perforated to allow water vapour to pass through the complete product. This allows SF19BB to combine thermal insulation with the function of a secondary rain barrier and breathable membrane.

By combining these functions into one product, SF19BB can remove the need to install a separate insulation layer and breather membrane in suitable constructions, helping reduce installation time, labour and material requirements.

The 40mm thick insulation provides a stated core R-value of 1.454 m²K/W, achieves W1 resistance to water penetration and is CE certified for its performance as a breathable membrane and water barrier.

Each 1.2m x 10m roll provides 12m² of coverage and weighs approximately 8kg.

What is SuperFOIL SF19BB Used For?

SuperFOIL SF19BB is designed for applications requiring both thermal insulation and a breathable membrane.

Typical applications include:

• Pitched roof insulation
• Roof refurbishment
• External wall insulation
• Timber frame walls
• External cladding systems
• New-build properties
• Extensions
• Renovation projects
• Insulation upgrades
• Hybrid insulation systems
• Applications requiring a breathable secondary rain barrier

Its combination of insulation and breathability makes SF19BB particularly useful in suitable roof and external wall constructions where moisture needs to escape towards the outside of the building.

2-in-1 Insulation and Breather Membrane

One of the main advantages of SuperFOIL SF19BB is its 2-in-1 construction.

A conventional insulated roof or wall may require separate products to provide thermal insulation and a breathable membrane.

SF19BB combines these functions into a single product, providing:

1. High-performance reflective insulation
2. Breathable membrane and secondary rain barrier

Using one product instead of separate insulation and breather membrane layers can help simplify the overall construction and reduce installation time.

It can also reduce the quantity of separate materials required on site.

Breathable Multifoil Insulation

SF19BB has been specifically engineered to remain breathable throughout its construction.

The outer surface incorporates a reflective breathable membrane, while the layers underneath are perforated to allow water vapour to pass through the product.

With a stated water vapour resistance of just 0.115 MNs/g, SF19BB allows moisture vapour to escape through the construction while continuing to provide useful thermal insulation.

This makes it fundamentally different from impermeable foil insulation products designed to function as vapour control layers.

Secondary Rain Barrier

The breathable outer layer of SuperFOIL SF19BB is designed to perform as a secondary rain barrier within suitable roof and wall constructions.

SF19BB achieves a W1 resistance to water penetration, providing the highest water resistance classification for membranes tested to the relevant standard.

This combination of water resistance and vapour permeability allows the product to resist external water penetration while allowing water vapour from within the construction to escape.

High Thermal Performance

SuperFOIL SF19BB provides a stated core thermal resistance of 1.454 m²K/W.

Its multilayer construction combines insulating layers with reflective surfaces to reduce heat transfer through the building envelope.

The reflective elements also provide radiant barrier performance when incorporated into an appropriate construction with suitable airspaces.

Actual overall thermal performance will depend on the complete roof or wall build-up, including other insulation materials, airspaces and structural components.

Reflective Radiant Barrier

SuperFOIL SF19BB provides more than conventional conductive thermal resistance.

Its reflective layers create a radiant barrier, helping reduce radiant heat transfer across suitable airspaces.

During colder weather, this helps retain useful heat within the building. During warmer summer conditions, the reflective surface can help reduce radiant heat entering through the building envelope.

This provides useful year-round thermal benefits, helping buildings remain warmer in winter and cooler in summer.

Ideal for Roof Insulation

SuperFOIL SF19BB is particularly suited to pitched roof insulation applications where both thermal performance and breathability are required.

The product can provide insulation while its breathable outer surface acts as the secondary rain barrier, potentially removing the requirement for a separate breather membrane in an appropriate construction.

Its flexible roll format also allows the insulation to be installed continuously across suitable roof structures, reducing the amount of cutting required compared with some conventional insulation systems.

Suitable for External Walls and Cladding

SF19BB can also be incorporated into suitable external wall and cladding systems.

Its breathable construction allows moisture vapour to migrate towards the exterior while its W1 water resistance provides protection against water penetration.

This makes the product particularly useful for suitable timber frame, external wall and rainscreen or cladding constructions requiring a breathable insulation layer.

Can Be Used with Other Insulation

SuperFOIL SF19BB can be used:

• As an insulation product in its own right
• In multiple suitable layers
• In combination with other insulation products

This provides considerable flexibility when designing an insulation system.

SF19BB can therefore be incorporated into hybrid insulation systems, combining multifoil insulation with other insulation materials to help achieve the required project-specific U-value.

The final U-value will depend on the complete construction and should be calculated for the specific roof or wall build-up.

Lightweight and Flexible Installation

Despite its multilayer construction and 40mm thickness, each 12m² roll of SuperFOIL SF19BB weighs approximately 8kg.

Its flexible roll format makes the insulation relatively easy to:

• Transport
• Carry around site
• Lift into roof spaces
• Position across structural members
• Cut where required
• Install continuously
• Adapt around details

The ability to combine insulation and breather membrane functions can also reduce the number of separate installation stages required.

Helps Reduce Installation Time and Waste

Using separate insulation and breathable membrane products can require multiple installation processes.

Because SF19BB combines both functions, only one principal layer needs to be installed in suitable constructions.

This can help reduce:

• Installation time
• Labour requirements
• Number of separate materials
• Cutting and fitting
• Material handling
• Installation waste

The flexible roll format can also help installers optimise material usage across larger roof and wall areas.

Manufactured Using 40% Recycled Materials

SuperFOIL SF19BB is manufactured using 40% recycled materials, helping reduce the demand for virgin raw materials within the product.

Its ability to combine insulation and breathable membrane functions can also reduce the number of separate construction products required for suitable applications.

W1 Resistance to Water Penetration

SuperFOIL SF19BB achieves W1 resistance to water penetration.

This allows its breathable outer membrane to act as a secondary barrier against external water while maintaining the vapour permeability required to allow moisture to escape from the construction.

This balance between water resistance and breathability is one of the key characteristics of SF19BB.

Strong and Durable Construction

SF19BB is designed to withstand the handling and installation demands associated with roof and wall construction.

Its stated tensile properties are:

• Length: 238 / 227 N/50mm
• Width: 111 / 100 N/50mm

The stated resistance to tearing is:

• Length: 179N
• Width: 179N

These properties help provide a durable membrane capable of withstanding normal handling and installation when correctly fitted.

Flexible at Low Temperatures

SuperFOIL SF19BB has a stated low-temperature flexibility of -40°C.

This helps the material retain flexibility during very cold conditions, providing useful durability for external roof and wall applications exposed to changing temperatures during construction and service.

Independently Tested Performance

SuperFOIL SF19BB has been independently tested by third-party certified laboratories and notified bodies.

The product is CE certified for its performance as a breathable membrane and water barrier, providing independently assessed performance data for specification and installation.

Its insulation performance is tested using the standards applicable to insulation products in the UK, allowing its stated thermal performance to be considered alongside other insulation materials when designing a complete construction.

Key Features and Benefits

• 2-in-1 product: Combines multifoil insulation and breathable membrane functions
• Breathable construction: Allows moisture vapour to escape through the product
• Secondary rain barrier: Provides additional protection within suitable roof and wall constructions
• W1 water resistance: High resistance to water penetration
• High thermal performance: Core R-value of 1.454 m²K/W
• Reflective radiant barrier: Helps reduce radiant heat transfer
• Year-round benefits: Helps keep buildings warmer in winter and cooler in summer
• 40mm thickness: Multilayer thermal insulation construction
• 12m² coverage: Each 1.2m x 10m roll covers 12m²
• 8kg roll weight: Lightweight relative to its coverage and performance
• Low vapour resistance: 0.115 MNs/g
• Ideal for roofs: Combines insulation with a breathable secondary barrier
• Suitable for external walls: Useful for appropriate wall and cladding constructions
• Suitable for new-builds: Can be incorporated into new construction
• Suitable for extensions: Provides a versatile insulation option
• Suitable for renovations: Useful for refurbishment and thermal upgrades
• Hybrid insulation compatible: Can be combined with other suitable insulation products
• Multiple-layer installation: Can be incorporated into suitable multi-layer systems
• Flexible: Straightforward to handle and adapt during installation
• Reduced installation stages: Can replace separate insulation and breather membrane layers in suitable constructions
• Reduced material requirements: Combines two building envelope functions
• 40% recycled materials: Manufactured with recycled content
• CE certified: Certified for breathable membrane and water barrier performance
• Strong construction: Good tensile and tear resistance
• Low-temperature flexibility: Flexible down to -40°C

SuperFOIL SF19BB Breathable Multi-Layered Foil Insulation Specification

Why Choose SuperFOIL SF19BB Breathable Multi-Layered Foil Insulation?

SuperFOIL SF19BB Breathable Multi-Layered Foil Insulation provides an effective way to combine two important building envelope functions within a single product.

Rather than installing separate insulation and breather membrane layers, SF19BB provides thermal insulation and a breathable secondary rain barrier in one 40mm multilayer product. This can simplify roof and wall construction while reducing installation time, labour and the quantity of separate materials required.

Its 1.454 m²K/W core R-value provides useful thermal resistance, while the reflective layers act as a radiant barrier to help reduce heat transfer throughout the year.

At the same time, its low 0.115 MNs/g water vapour resistance allows moisture to escape, while its W1 resistance to water penetration helps protect the construction against external water.

With CE certified breathable membrane performance, 40% recycled content and 12m² coverage per 1.2m x 10m roll, SuperFOIL SF19BB is a versatile insulation solution for new-build, extension and renovation projects requiring both thermal performance and breathability.