Reinforced reflective roofing insulation for residential, commercial and industrial roof systems. Compare four Enviro-Tuff grades by construction, fire classification and tested system performance.
Enviro-Tuff uses a low-emissivity reflective surface to reduce radiant heat transfer when installed beside the required air space. Construction, reinforcement and aluminium surfaces differ between grades.
Reflective foil and bulk polyester insulation can be complementary parts of a professionally designed roof. A tested system R-value is not the intrinsic R-value of the thin foil sheet.
Values below are the manufacturer’s stated classifications and ASTM C518 system thermal resistance, with a ±10% tolerance on thermal values. Match the product grade and installation conditions to the design.
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| Grade | Construction | Grammage | Fire classification | System R-value (m²·K/W) |
|---|---|---|---|---|
| 201 FR | Single-sided aluminium / reinforced HDPE | 80 g/m² ±10% | B/B3 | 1.34 ±10% |
| 202 FR | Double-sided aluminium / woven HDPE | 117 g/m² ±10% | A/A1 | 1.41 ±10% |
| 202 ECO | Aluminium / leno fabric / metallised PET | 90 g/m² ±10% | B/B1 | 1.36 ±10% |
| 203 ECO | Double-sided aluminium / paper / fibreglass reinforcement | 245 g/m² ±10% | B/B1/2/H (SP) | 2.31 ±10% |
The ASTM C518 system results use a 40 mm upper air gap at 50°C and a 60 mm lower air gap at 10°C. The ISO 8302 results use 40 mm at 35°C above and 60 mm at 20°C below. These conditions are part of the reported performance.
ISO 8302 system values are 1.49 for 201 FR, 1.86 for 202 FR, 1.49 for 202 ECO and 2.42 m²·K/W for 203 ECO, each ±10%. Do not add these assembly results directly to another complete assembly’s R-value.
single-sided aluminium
A three-layer laminate of aluminium foil, PE tie layer and reinforced HDPE woven fabric. Nominal width is 1250 mm ±5 mm and minimum roll length is 36 m.
The sheet lists aluminium emissivity ≤0.05 and water vapour permeance ≤0.002 g/(s·MN).
Technical specifications and supporting test documentation are available on request. Please contact info@thermosolutions.co.za.
double-sided aluminium
A five-layer laminate with aluminium foil on both sides of a woven HDPE core and PE tie layers. Nominal width is 1250 mm ±5 mm and minimum roll length is 40 m.
The manufacturer sheet states SANS 428 Class A/A1, with reference to SANS 10177 Parts 5 and 10. Select against the project fire requirements rather than assuming one classification covers every use.
Technical specifications and supporting test documentation are available on request. Please contact info@thermosolutions.co.za.
aluminium and metallised PET
ENVIRO-TUFF 202 ECO combines aluminium, PE tie layers, leno reinforcement and metallised polyester. Nominal width is 1250 mm ±5 mm and minimum length is 36 m.
The two surfaces are different: stated aluminium emissivity is ≤0.05 and MPET emissivity is ≤0.50. Orientation and the adjacent air space therefore matter.
Technical specifications and supporting test documentation are available on request. Please contact info@thermosolutions.co.za.
heavier reinforced construction
A six-layer construction with aluminium surfaces, PE tie layers, a paper core and fibreglass reinforcement. Nominal width is 1250 mm ±5 mm and minimum roll length is 40 m.
The quoted system thermal resistance is higher than the other three grades under the stated test configurations. Suitability still depends on the roof design, exposure and fire requirements.
Technical specifications and supporting test documentation are available on request. Please contact info@thermosolutions.co.za.
An air space between the foil and battens is vital. Follow the manufacturer’s requirements and the specified roof build-up.
Condensation, sea salts, acidic vapours and corrosive liquids or mists can tarnish aluminium and affect emissivity. Assess exposure before choosing a product.
Yes. The adjacent air space is essential to reflective performance and is part of the published test configurations.
Yes, where the roof design allows. The complete assembly needs to be assessed rather than simply adding unrelated system R-values.
Identify the exact grade, roll dimensions and required installation, fire and thermal criteria. The four grades are not interchangeable.
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