Alu S35

Name: Alu S35
Brand: NEXLER
SKU: W-PA186-LA00Z-NX1R-1000

Heat weldable underlayer bituminous felt

Application:

Vapour barrier for roofs and terraces under the thermal insulation layer
Horizontal damp-proof insulation
Radon barrier in underground parts of buildings under floors

Properties:

Excellent vapour barrier properties
Effective protection against radon radiation
Fixed by welding
Composite reinforcement made of aluminium

Available packaging:

10 m

Type of reinforcement	composite of aluminum film and glass veil
Top finishing	fine-grained
Low temperature flexibility	≤ 0°C
Width	≥ 1 m
Straightforwardness	≤ 20 mm per 10 m roll length
Thickness	3,5 mm ± 0,2 mm
Resistance to external fire exposure* *applies to the examined layer systems	B_roof(t₁)
Reaction to fire	class E
Watertightness: waterproof at a pressure	≥ 2 kPa (method A) ≥ 10 kPa (method B)
Maximum tensile force: - longitudinal extension - transversal extension	500 ± 200 N/50 mm (4 ± 2) % 300 ± 150 N/50 mm (4 ± 2) %
Resistance to root penetration	NPD
Resistance to static loading	≥ 5 kg (method B)
Resistance to impact	≥ 600 mm (method A)
Resistance to tearing: - longitudinal - transversal	150 ± 100 N 150 ± 100 N
Resistance of the joint: - shear strength • longitudinal joint • transversal joint	300 ± 150 N/50 mm 500 ± 200 N/50 mm
Permeation of water vapour	1,3E+12 m²·Pa·s/kg ± 25%
Diffusion resistance coefficient S_d	approx. 260 m
Radon diffusion coefficient	D < 10⁻¹⁴ m²/s
Durability: - durability after artificial ageing, watertightness - durability against chemical - after artificial ageing, vapour diffusion - chemicals resistance	≥ 2 kPa (method A) acc. to annex A of standard EN 13969 1,3E+12 m²·Pa·s/kg ± 50% acc. to annex A of standard EN 13970
Reference document(s)	EN 13707:2004+A2:2009; EN 13969:2004; EN 13969:2004/A1:2007; EN 13970:2004; EN 13970:2004/A1:2006

Making an insulation using NEXLER Alu S35 bituminous felt should be carried out according to the technical design, in accordance with the current building regulations and the detailed guidelines for the design and execution of insulation contained in NEXLER Insulation Systems and the Technical Data Sheet.
The bituminous felt should be installed in ambient temperatures of above +5°C, this requirement applies to the time of day and night.
Do not carry out insulation work during strong winds and precipitation.
The substrate should meet the following requirements:
- dry substrate (concrete in an air-dry condition, without any visible traces of moisture or darkening caused by moisture),
- clean substrate (the surface of the concrete is free of loose fractions, dust, oil stains, grease and other impurities),
- smooth substrate (local unevenness and cavities in the surface of concrete do not exceed ± 5 mm),
- even substrate (the gaps between the surface of the substrate and a 4 m long batten placed on the concrete substrate do not exceed 10 mm).
Before welding NEXLER Alu S35 bituminous felt is recommended to prime concrete substrate with solvent-based bitumen primers for example NEXLER Penetrator G7, or water-based bitumen products for example NEXLER BITFLEX Primer.
NEXLER Alu S35 bituminous felt should be fixed by welding to a primed concrete substrate. Application should be carried out after the priming agent has completely dried (or cured).
As a result of heating both the substrate and the underside of the bituminous felt with a burner, the thin protective plastic foil melts, the asphalt is slightly melted and the bituminous felt sticks evenly to the substrate. Maintain a bituminous felt overlap min. 8 cm wide along the length of the felt strip and an overlap min. 12 cm wide at the joint perpendicular to the length of the felt strip. An asphalt outflow of approx. 0,5 cm in width over the entire length of the welded overlap is required.
Before use, please read the application details in the product's Technical Data Sheet.