What type of facade is the VITROBARRIER 85 membrane intended for?
VITROBARRIER is a superdiffusion membrane designed to protect thermal insulation from wind and moisture in ventilated facades. It is installed on the outside of the insulation, behind the facade cladding. This is not an internal vapor barrier and should not be used as a substitute for PAROBARRIER. The exact facade detail must ensure continuous protection and moisture drainage.
What layers is VITROBARRIER 85 made of?
VITROBARRIER is a two-layer polypropylene material. The outer layer provides mechanical resistance and UV stability, while the inner functional layer performs windproof, waterproof, and vapor-permeable functions. This construction allows moisture from the insulation to be drained into the ventilated cavity. The membrane is not a bituminous waterproofing and is not intended to remain as a visible final facade covering.
What size and technical specifications does VITROBARRIER 85 have?
The roll measures 1.5 x 50 m, or 75 m² nominal area, and LATIVA’s product image identifies it as 85 g/m². JUTA publishes a water resistance class of W2, strength of 170/125 N per 50 mm, air permeability of 0.04 m³/m²·h at 100 Pa, and a water column of 280 cm. The useful area is reduced by overlaps.
Which side of VITROBARRIER 85 should face outward?
The colored side with the VITROBARRIER inscription should face outward, towards the ventilation cavity and facade cladding. The membrane is mounted directly onto the thermal insulation. This orientation is explicitly specified for VITROBARRIER and should not be determined by analogy with other foils. Before closing, check the continuity of the layer and all penetrations through the facade.
What overlaps are required when installing VITROBARRIER 85?
JUTA requires a 15 cm overlap horizontally and 10 cm vertically. The sheets in the overlap zones must be joined with K-2 mounting tape. Fastening is done with steel staples or corrosion-resistant nails with flat heads. The quantity of membrane and tape is calculated based on actual rows, corners, and openings, not just the facade area.
Is an air gap needed in front of VITROBARRIER 85?
Yes, a ventilation cavity must be formed between VITROBARRIER and the external facade cladding. This allows moisture passing through the structure to be drained instead of remaining trapped in front of the membrane. The size, inlet and outlet openings, and firebreaks are determined by the facade system and project; the membrane itself does not create a functioning ventilated facade.
