Verified by manufacturer 3 months ago
BM Trada
Certificate type
A waterproof, low emissivity, highly reflective insulating breather membrane for use externally on buildings which are sited in very severe, exposed locations aligned to STA Advice Note 18.
Low emissivity insulating breather membrane for use on the cold side of insulation to enhance the thermal performance of external timber frame walls, Structural Insulated Panels (SIPs), Cross Laminated Timber (CLT) panels and steel frame construction. Designed for use externally on buildings which are sited in harsh environments where it is recommended that membranes with Class W1 water penetration are used.
Protect Thermo Extreme is a waterproof, low emissivity, highly reflective insulating breather membrane which enhances the thermal performance of timber frame walls, Structural Insulated Panels (SIPs), Cross Laminated Timber (CLT) panels and steel frame construction.
Designed for use externally on buildings in locations which are typically high altitude, open to high winds and on westerly coastal sites in England, Ireland, Wales and Scotland, where a Class W1 water penetration resistance is recommended. Used on the cold side of the insulation.
Protect Thermo Extreme has been developed from the tried and tested Protect TF200 Thermo range and additionally utilises microporous film and microperforation technology.
Produced in the UK of five ply construction, Protect Thermo Extreme’s innovative design provides a highly reflective yet vapour permeable surface which protects the outer sheathing from moisture and ensures the water vapour passes into the external wall cavity. When installed with the foil facing into an unventilated airspace, this provides enhanced thermal performance by effectively blocking infra-red radiation, helping to deliver a low overall U-value of the wall.
Features and benefits:
Color | Silver Guidance for specification option: Reflective silver face with green product branding |
Finish | Reflective |
Material | Polypropylene Guidance for specification option: Non-woven Polypropylene core. Aluminium Guidance for specification option: Permeable high purity aluminium foil layer. |
Shape | Rectangle Guidance for specification option: Supplied as a roll. |
Length | 100000 mm |
Width | 3000 mm |
Uniclass | |
CAWS | H42/115 Precast composite H42/115 Precast composite H51/110 Cladding H51/110 Cladding H42/110 Precast homogeneous H42/110 Precast homogeneous H41/110 GRP single-skin cladding H40/110 GRC cladding H20/155 Sheet cladding (attached to timber battens) H20/10 Sheet cladding P10/320 Breather membrane P10/65 Breather membrane H21/130 Breather membrane H22/130 Breather membrane H30/350 Breather membrane H31/280 Breather membrane H92/785 Breather membrane H21/20 Breather membrane H22/20 Breather membrane H30/50 Breather membrane H31/55 Breather membrane |
Product range |
Standard | BS EN 13859-1, BS 5250, BS EN 15976, BS EN 8990, BS EN 12572, BS EN 13111; BS EN 13859-2. |
Third-party certification | BM TRADA Certified. |
Performance criteria | |
Water vapour properties | Water vapour resistance to BS EN ISO 12572; 0.47 MNs/g / 0.093 Sd(m). |
Tensile properties | Tensile strength to BS EN 12311-1 with mods; MD (along roll): 245 N/50mm; CD (across roll): 135 N/50mm. |
Class (minimum) | W1.Guidance for specification option: To BS EN 13111 - No leakage (aged). |
Material | Aluminium foil layer with non-woven polypropylene core. |
Form | Non-woven, spunbond.Guidance for specification option: Five ply construction to include a microporous film between two layers of spunbond, with a permeable, high purity aluminium foil layer on the upper surface that is micro perforated and embossed lower surface |
Weight (minimum) | 145 g/m².Guidance for specification option: Per roll: 45.9 kg. |
Thickness (minimum) | 0.42 mm. |
Reflective face | Yes. |
Emissivity | 0.02 (ε). Guidance for specification option: Unaged to BS EN 15976. Manufacturer guidanceIndependently tested by a European notified laboratory |
Emissivity (aged) | 0.03 (ε). Guidance for specification option: aged to BS EN 15976 Manufacturer guidanceIndependently tested by a European notified laboratory |
Flame spread (to BS 476-6 and BS 476-7) | Class 1. Guidance for specification option: To BS 476-7 |
Tear strength | MD (along roll): 177 N; CD (across roll): 191 N. Guidance for specification option: To EN 12310-1 with mods. |
Thermal resistance | 0.77 m²K/W. Guidance for specification option: Aged - to BS EN ISO 8990 & BS EN 15976 (incorporates printing and to standard 600mm stud centres). Manufacturer guidanceIndependently tested by National Physics Laboratories (NPL) in a typical UK house with timber frame wall cavity and verified by BM TRADA |
Roll width | 3000 mm. |
Roll length | 100 m. |
Fire classification | Class E. Guidance for specification option: Tested in accordance with BS EN 11925-2 |
Resistance to water penetration | To BS EN 13111, Pass Class W1. |
Performance characteristics | Aged thermal resistance of 0.77 m²K/W. Guidance for specification option: Incorporating printing and using typical 600 mm stud centres. Manufacturer guidanceSee individual properties below or manufacturer's literature for further details. |
Contains Red List materials | No |
Country of product manufacture | United Kingdom |
Material | Polypropylene Guidance for specification option: Non-woven Polypropylene core. Aluminium Guidance for specification option: Permeable high purity aluminium foil layer. |
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