Four-layer roof membranes have already earned millions of customers in the United States, and are now conquering Europe. The use of the best components in the world and regular tests – carried out in professional laboratories – guarantee perfect quality of membranes and their reliability for years. 

When compared to CROMAR equivalents, STROTEX rolls stand up to the same/higher specification:

STROTEX  95g > CROMAR Vent 3 Light (85g)

STROTEX 115g > CROMAR Vent 3 Classic (115g)

STROTEX 135g > CROMAR Vent 3 Blue (135g)


 Advantages 
- high water vapour permeability due to which the membrane absorbs moisture and directs it outside through the ventilation gap. 
- Completely watertight, protects the thermal insulation from the outside against rain or snow. 
- it has UV stabilizers, slowing down the aging process, caused by weather conditions. 
- equipped with special anti-reflective coating preventing the occurrence of light reflections. 

Usage 
- diffusion-open membrane, designed as a layer of preliminary covering for the external roofing. 
- excellent windproof material, intended for walls of buildings in skeletal structures. 
Due to the low Sd coefficient, this membrane is used in roofs with thermal insulation up to the full rafter height, in which it is laid directly on the insulation.

Specification:
- for 95gsm
Width: 1.5m
Length: 50m
Grammage: 95 g/m2
Reaction to fire: EN ISO 11925-2 - Class E
Watertightness (2 kPa) EN 1928 - Class W1
Resistance to tearing in longitudinal direction EN 12310-1 N 110 (+25;-25) in transverse direction N 110 (+25;-25)
Tensile strength in longitudinal direction EN 12311-2 N/50mm 150 (+30; -30) in transverse direction N/50mm 85 (+15;-15)
Water vapour resistance EN 1931  2,0 *108 m2 sPa/kg +/- 10%
Vapour permeability EN 1931  >1700 (g/m2 )/24h
Sd EN 1931  0,02 m (+0,03;-0,01)
Application temperature range from -30 to 80 C

for 115gsm
Width: 1.5m
Length: 50m
Grammage: 115 g/m2
Reaction to fire: EN ISO 11925-2 - Class E
Watertightness (2 kPa) EN 1928 - Class W1
Resistance to tearing in longitudinal direction EN 12310-1 N 120 (+50;-50) in transverse direction N 130 (+50;-50)
Tensile strength in longitudinal direction EN 12311-2 N/50mm 190 (+50; -50) in transverse direction N/50mm 100 (+40;-40)
Water vapour resistance EN 1931  2,0 *108 m2 sPa/kg +/- 10%
Vapour permeability EN 1931  >1700 (g/m2 )/24h
Sd EN 1931  0,02 m (+0,03;-0,01)
Application temperature range from -30 to 80 C

For 135gsm
Width: 1.5m
Length: 50m
Grammage: 135 g/m2
Reaction to fire: EN ISO 11925-2 - Class E
Watertightness (2 kPa) EN 1928 - Class W1
Resistance to tearing in longitudinal direction EN 12310-1 N 140 (+45;-45) in transverse direction N 140 (+45;-45)
Tensile strength in longitudinal direction EN 12311-2 N/50mm 210 (+30; -30) in transverse direction N/50mm 110 (+20;-20)
Water vapour resistance EN 1931  2,0 *108 m2 sPa/kg +/- 10%
Vapour permeability EN 1931  >1700 (g/m2 )/24h
Sd EN 1931  0,02 m (+0,03;-0,01)
Application temperature range from -30 to 80 C