Nexler

Application:

Waterproofing layer in multi-layer green roof coverings, ballasted roofs and under pavement intended for traffic
Waterproofing for underground parts of buildings

Properties:

Resistant to root overgrowth
Double SBS modification
Durable and puncture-resistant
Approved for use under heavy surface protection
Flexible in a wide temperature range
Approved for use in reduced ambient temperatures

Type of reinforcement	non-woven polyester reinforced with glass fibers
Top finishing	fine-grained
Low temperature flexibility	≤ -20°C
Width	≥ 0,99 m
Straightforwardness	≤ 10 mm per 5,5 m roll length
Thickness	(4,2 ± 0,2) mm
Resistance to external fire exposure* *applies to the examined layer systems	Broof(t₁)
Reaction to fire	class E
Watertightness: waterproof at a pressure	≥ 10 kPa (method A) ≥ 60 kPa (method B) ≥ 250 kPa (method B)
Maximum tensile force: - longitudinal extension - transversal extension	850 ± 250 N/50 mm (50 ± 15) % 550 ± 250 N/50 mm (50 ± 15) %
Reference document(s)	EN 13707:2004+A2:2009 EN 13969:2004, EN 13969:2004/A1:2006
Resistance to root penetration	requirements met
Resistance to static loading	≥ 15 kg (metoda A) ≥ 10 kg (metoda B)
Resistance to impact	≥ 900 mm (method A)
Resistance to tearing: - longitudinal - transversal	350 ± 150 N 350 ± 150 N
Resistance of the joint: - shear strength • longitudinal joint • transversal joint	550 ± 250 N/50 mm 850 ± 250 N/50 mm
Durability: flow resistance at elevated temperature	(100 ±10)°C
Durability: - durability after artificial ageing, watertightness - durability against chemical	≥ 60 kPa (method B) acc. to annex A of the standard EN 13969
Dimensional stability	≤ 0,5%

Making an insulation using NEXLER Zielony Dach PYE PV200 S42 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 0°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 (no visible traces of moisture or darkening caused by moisture),
- clean substrate (the surface is free of dust, oil stains, grease and other contaminants),
- 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 patch do not exceed 10 mm),
- roof slope inclination min. 1%.
Before welding NEXLER Zielony Dach PYE PV200 S42 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.
Substrates made of underlayer bituminous felt do not require priming.
During acceptance, the following should be checked:
- correctness of welding of overlaps - a continuous trickle of melted asphalt mixture on the overlaps is required,
- adhesion of the bituminous felt to the substrate,
- correctness of detail work.
NEXLER Zielony Dach PYE PV200 S42 bituminous felt should be fixed by welding. 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 - 1 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.

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A roof with a vision – green solutions for investments

Green roofs in modern construction are not a passing trend, but a real market need driven by climate, urbanisation and regulatory challenges. They are a key element of sustainable development strategies, not only distinguishing investments on the market, but also having a real impact on their value and functionality. It is a space where ecology meets long-term safety and technical durability.

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