Extra FR Net 16mm Multi-Foil Reflective Insulation
Nine-layer, net-reinforced multi-foil with three reflective foils and two FR bubble cores. Reflects 98% of radiant heat, tested core R 0.43, BS 476 Class 1 / Class 0. 16 to 20 mm, rolls 1.20 m x 10 / 20 m.
- Description
- Reviews (0)
Description
Extra FR Net 16mm fire rated multi-foil reflective insulation
Nine-layer, net-reinforced multi-foil with three reflective foils and two large FR bubble cores. Reflects 98% of radiant heat, tested core R 0.43.
Extra FR Net 16mm is a fire-retardant, net-reinforced multi-foil insulation for roofs, ceilings and walls. Three reflective foil layers are interleaved with two large FR air-bubble cores, 16 to 20 mm in total, giving unique internal reflection and a tested core R-value of 0.43 m²K/W. It is the high-performance choice for roofs and ceilings exposed to intense, sustained heat.
Also see the Alumix Extra 16mm reflective foil insulation.
What is Extra FR Net 16mm reflective insulation?
Extra FR Net 16mm (product code EXT-16-FRNT) is a nine-layer multi-foil. Its construction is 19 µm MTX foil / bonding / 8 to 10 mm FR air bubble / 9 µm pure foil / bonding / 8 to 10 mm FR air bubble / bonding / 18 µm foil / reinforced net.
The central 9 µm pure foil layer reflects heat inside the product itself, and the reinforced net bonded to the outer foil adds tear resistance. It is classified BS 476 Class 1 / Class 0 and tested to AS/NZS 1530.2 / 1530.3.
Key benefits
- Reflects 98% of radiant heat. Three reflective foil layers.
- Tested core R 0.43 m²K/W. Higher insulation from two large FR bubble cores.
- Triple actions. Vapour, heat and thermal break barrier.
- Fire rated. BS 476 Part 6 Class 0 and Part 7 Class 1, with FR additive in all film layers.
- Net-reinforced, tear resistant. Reinforced net bonded to the outer foil.
- Nine-layer build. Unique internal reflection.
- Does not absorb moisture or support mould. Performance does not drop over time.
- No glass fibre, safe to handle. Lightweight and easy to cut and install.
Technical specifications
| Product type | Fire-retardant, net-reinforced multi-foil insulation |
|---|---|
| Product code | EXT-16-FRNT |
| Construction | 19 µm MTX foil / bonding / 8–10 mm FR air bubble / 9 µm pure foil / bonding / 8–10 mm FR air bubble / bonding / 18 µm foil / reinforced net (nine layers) |
| Outer face | 19 µm MTX foil one face · 18 µm foil + reinforced net |
| Thickness | 16 to 20 mm |
| Roll size | 1.20 m x 10 / 20 m (12 to 24 m² per roll) |
| Reinforcement | Reinforced net, bonded to the outer foil |
| Radiant heat reflectivity | 98% |
| Reflective foil layers | 3 |
| Central foil layer | 9 µm pure |
| Core thermal resistance (tested) | R 0.43 m²K/W |
| Thermal equivalent | R 4.62 m²K/W* |
| Fire classification (BS 476 Part 6) | Class 0 |
| Fire classification (BS 476 Part 7) | Class 1 |
| Fire performance | BS 476 Class 1 / Class 0 · AS/NZS 1530.2 / 1530.3 |
*Heat flow down, 2 x 75 mm air gaps, ε 0.02 to 0.03.
Thermal performance: R-value by assembly
Reflective insulation works best when installed next to an air gap. The total system R-value depends on how many reflective air cavities are created in the roof, ceiling or wall.
| Assembly / air cavity | Winter (heat flow up) | Summer (heat flow down) |
|---|---|---|
| Roof / ceiling, one 25 mm reflective cavity | R 0.92 | R 1.32 |
| Roof / ceiling, two 25 mm reflective cavities | R 1.41 | R 2.21 |
| Wall assembly, 38 mm cavity, horizontal heat flow | R 1.17 (one cavity) / R 1.91 (two cavities) | |
Values are total system R in m²K/W. Cavity resistance calculated to BS EN ISO 6946 (ref. BS EN 16012) for an unventilated cavity with a low-emissivity surface (ε 0.02 to 0.03). Core product R 0.43 m²K/W applies to the product alone without a reflective air cavity.
Applications
- Roof underlay and metal roofing, over the purlins or under the rafters
- Ceilings and attic spaces
- Walls and partitions
- Warehouses, factories and metal buildings
- Residential and commercial buildings
- New build and renovation projects
How to install Extra FR Net 16mm on a roof or ceiling
- Measure the roof or ceiling area and work out the number of rolls needed for the total m².
- Set the purlins or rafters to the correct spacing.
- Lay Extra FR Net over the purlins or under the rafters, with the foil face toward the heat source.
- Fix with screws and cut to length, keeping the sheet taut.
- Seal all joints and overlaps with aluminium foil tape.
Air gap tip: keep a 20 to 90 mm air gap on the reflective face for best performance, and maintain at least 75 mm clearance from downlights.
Testing and certification
Extra FR Net 16mm is tested to BS 476 Part 6 & 7 (Class 1 / Class 0), EN 13501-1 (B-s1,d0), ASTM C 1371, ISO 8301 / ASTM C 518 and BS EN ISO 6946. Test reports and certificates are available on request.
Frequently asked questions
What is Extra FR Net 16mm used for?
It is a high-performance multi-foil insulation for roofs, ceilings and walls, suited to buildings exposed to intense, sustained heat such as warehouses, factories and metal-roofed homes.
Why does it have three foil layers?
Two outer foils reflect radiant heat, and a central 9 µm pure foil between the two bubble cores reflects heat inside the product, raising its tested core R-value to 0.43 m²K/W.
Is Extra FR Net 16mm fire rated?
Yes. It is classified Class 0 under BS 476 Part 6 and Class 1 under BS 476 Part 7, and tested to EN 13501-1 (B-s1,d0).
What is the R-value of Extra FR Net 16mm?
The tested core R is 0.43 m²K/W. With reflective air cavities, total system R-values reach up to R 2.21 m²K/W in a roof with two 25 mm cavities (heat flow down), and a thermal equivalent of R 4.62 m²K/W with two 75 mm air gaps.
What roll sizes are available?
Rolls are 1.20 m wide in 10 m and 20 m lengths, covering 12 to 24 m² per roll.
Do I need an air gap when installing?
Yes. Maintain a 20 to 90 mm air gap on the reflective face, and at least 75 mm clearance from downlights.
Get a quote for Extra FR Net 16mm
Alumix Insulation Global manufactures reflective foil insulation, radiant barriers and vapour barriers for residential, commercial and industrial projects. Contact our team for pricing, bulk orders, technical data or test certificates, or email info@alumixinsulationglobal.com.
Values shown are subject to verification against current test reports. Thermal performance may vary with installation method, air gap and environmental conditions. Specifications subject to change without prior notice.
Reviews
There are no reviews yet.