SuperFOIL SF19+ Multifoil Insulation – Balanced 3-in-1 Performance

SuperFOIL SF19+ is a versatile multifoil insulation designed to deliver an excellent balance between thermal performance, build-up depth, and installation simplicity. With a nominal thickness of 45 mm, SF19+ combines high-performance insulation, a radiant barrier, and an integrated vapour control layer (VCL) in a single, space-saving system.

It is suitable for roofs, walls, and floors, making it ideal for new builds, retrofits, timber-frame construction, and DIY projects.

This is a vapour-closed multifoil insulation with an integrated vapour control layer (VCL), designed for internal applications where airtightness and condensation control are required.

Equivalent thermal performance in typical construction build-ups: internal comparative assessments indicate that 45 mm of SuperFOIL SF19+ can achieve thermal performance comparable up to 300 mm of traditional mineral wool insulation (λ = 0.040 W/mK), depending on installation method, air gaps, and overall system design. These values are provided for indicative comparison purposes only. Final thermal performance must always be verified using the official SuperFOIL U-Value calculation for the specific construction build-up.

Product Dimensions & Coverage

• Thickness: 45 mm

• Length: 10 m

• Width: 1.5 m

• Coverage: 15 m²

• Weight: approx. 13 kg

3-in-1 Multifunctional Design

SuperFOIL SF19+ integrates three essential functions into one product:

• Thermal insulation to reduce heat loss

• Radiant barrier that reflects radiant heat back into the building in winter and reduces solar heat gain in summer

• Integrated vapour control layer (VCL), removing the need for a separate vapour barrier

This integrated approach simplifies construction, reduces material layers, and helps achieve required U-values efficiently.

Thermal Performance

SF19+ works across all three modes of heat transfer — conduction, convection, and radiation — unlike traditional insulation materials that primarily address conduction alone.

Certified thermal performance (core value + air spaces, EN 16012):

• Core R-Value: 1.63 m²K/W

• Roof (incl. air spaces): 2.53 m²K/W

• Wall (incl. air spaces): 2.96 m²K/W

• Floor (incl. air spaces): 4.29 m²K/W

• Emittance: 0.05

These values reflect SuperFOIL’s certified testing methodology and real-world performance approach.

What does R-Value mean?

R-Value (m²K/W) measures a material’s resistance to heat flow.
The higher the R-Value, the better the insulation performance.

What does Emittance mean?

Emittance measures how much heat a surface emits (radiates).

A low emittance value (typically around 0.05) means very low heat emission and high reflection of radiant heat, improving overall thermal performance when installed with adjacent air spaces.

This interpretation is aligned with EN 16012 and reflects how reflective multifoil insulation performance is evaluated across EU technical documentation.

Performance vs Traditional Insulation

Thanks to its multi-layer reflective foil technology and integrated air spaces, SuperFOIL SF19+ can achieve thermal performance typically associated with much thicker conventional mineral or glass wool insulation systems, depending on the overall build-up and air space configuration.

This makes SF19+ an effective solution where build-up depth is restricted, allowing improved thermal performance without excessive wall, roof, or floor thickness.

Exact U-values depend on the complete construction build-up. Project-specific calculations are available.

Key Benefits

• Slim profile with strong thermal performance

• Replaces insulation, vapour control layer, and radiant barrier

• Easy to install – no specialist tools required

• Lightweight and flexible for faster fitting

• Minimal waste compared to rigid insulation boards

• Suitable for new builds and retrofits

• Can be installed in combination with other insulation types

• Made from up to 40% recycled materials

• Fully recyclable with a 50+ year service life

Applications

SuperFOIL SF19+ is suitable for:

• Roof constructions

• Wall build-ups

• Floor structures

• Timber-frame and solid constructions

It is typically installed on the internal side of the building envelope as part of dry-lining systems.

Fire & Safety Performance

• Reaction to Fire (Euroclass): Class F

• Water penetration: W1

• Water vapour transmission: Pass

SF19+ - Quality & Certification

• Manufactured under a certified ISO 9001:2015 quality management system

• CE certified to EN 13984:2013 for vapour control performance

• Tested to meet current UK and EU building regulations when installed correctly

• Designed, tested, and supported by SuperFOIL technical specialists

• Independently tested and assessed as part of the SuperFOIL multifoil insulation range, including
  BBA testing (British Board of Agrément – independent product and system performance assessment)
  and LABC certification (Local Authority Building Control – approval for compliance with building regulations)
  at range level

Why Choose SuperFOIL SF19+?

SF19+ is frequently specified where moderate build-up depth and reliable thermal performance are required. It offers a practical midpoint between ultra-slim solutions and high-performance multifoils, making it suitable for a wide range of residential and light commercial applications.

Its integrated vapour control layer simplifies detailing, reduces installation errors, and supports compliance with modern building regulations.

Compare the SuperFOIL Insulation Range

Summary

SuperFOIL SF19+ is a balanced, space-efficient multifoil insulation that combines insulation, vapour control, and radiant performance in one product. It delivers dependable thermal results, simplified installation, and long-term durability — making it an excellent choice for both professionals and informed homeowners.