Thermal insulation VAPOR 85
extruded polystyreneXPSroll

thermal insulation
thermal insulation
thermal insulation
thermal insulation
thermal insulation
thermal insulation
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extruded polystyrene, XPS
Technical characteristics
high-performance, waterproof
Fire Class
Euroclass E
with vapor barrier
Thermal conductivity

0.036 W/(m.K)

Thermal resistance

0.35 m²K/W, 0.56 m²K/W


2,500 mm (98 in)


900 mm (35 in)


12.5 mm (0.49 in)


wedi Vapor 85 is both a board type sealing system and a building board with structural vapour barrier properties. Thanks to the pre-integrated vapour membrane barrier applied in the factory it is perfect for challenging applications in areas with high levels of humidity. wedi Vapor 85 is made from blue extruded polystyrene hard foam (XPS) which is reinforced with alkali-resistant fibreglass mesh and coated with polymer-modified mortar on both sides, as well as a vapour membrane barrier on one side providing an SD value of 92. For rooms with high levels of humidity For wall, ceilings and floors Waterproofing, vapour barrier and thermal insulation Vapour barrier (polyethylene foil with special fleece layer) - 0,51 mm Water vapour diffusion equivalent air layer thickness Sd value - 92 m Resistance to water vapour diffusion (μ) DIN EN 1931 (sheet material vapour barrier) - 170.000 Water vapour diffusion flow resistance Z value (sheet material vapour barrier) - 555,64 GPa • m² • s/kg 1,54 •109 m² • s/kg Water vapour diffusion flow resistance (sheet material vapour barrier) - 4.065.287 s/m Fire behaviour EN 13501, building material class - E Adhesive tensile strength - 0,27 N/mm² Linear coefficient of thermal expansion - 0,02 mm/mK Technical properties of raw foam building board systems Long-term compressive strength (50 years) ≤ 2% compression EN 1606 - 0,08 N/mm2 Compressive resistance or compressive strength at 10% compression EN 826 - 0,25 N/mm2 Associated module of elasticity EN 826 - 10 – 18 N/mm2 Tensile strength EN 1607 - 0,45 N/mm2 Shearing resistance EN 12090 - 0,2 N/2 Shear modulus EN 12090 - 7 N/2 Bulk density EN 1602 - 32 kg/m3


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.