A2 Fire Rated AVCL System

Fire Rated Weatherproofing Vapour Barrier Membrane and required accessories. 

The Effisus Vapour FR System is fire rated as Class A2-s1,d0 according to EN13501-1, having obtained the final fire classification with Effisus accessories (tapes and adhesives) tested as a system.

AVCL should be located on the internal face (warm side) of the back wall and fixed on the top of the vertical Galvanized Steel SFS Studs. The weatherproofing design of the AVCL system should be done in detail and project by project basis.

This solution is available at Effisus NBS Source profile.

Why should you choose Effisus Vapour FR System?


  • Fire reaction: Class A2-s1,d0 in accordance with EN 13501-1;
  • Watertight
  • Water Vapour diffusion tight (closed joints)
  • Airtight
  • Windtight
  • Integrated component of the Effisus EcofacadeSystem


  • High impact on building longevity
  • Promotes indoor air quality and user health
  • Reduced maintenance needs
  • Recyclable Membranes
  • Non-solvent accessories
  • Reduction of wastes by customizing solutions

Typical Application

  • Vapour Control Layer Membrane (VCL)
  • Rainscreen cladding
  • Interfaces in ventilated facades
  • Interfaces in curtain walls
  • Interfaces in traditional facades
  • Interfaces in pre-fabricated facades

Solution Benefits

  • Fire protection – Class A2-s1, d0 according to EN13501-1, tested with Effisus accessories.
  • Multifunction – 100% water, vapour and wind tight.
  • Resistant – High mechanical resistance and resistance to high and low temperature.
  • Complete system – Complete range of accessories for any project need.
  • Energy Efficiency – The airtightness of the membrane improves the air quality in the building interior, durability of all the facade components and avoid condensation risk.

Technical Characteristics

Testing Method  Results
Reaction to Fire – EN 13501 – 1 Class A2-s1, d0
Sd value – EN 1931 >1500
Vapour resistivity – EN 1931 >7500 MNs/g
Water penetration – EN 1928 W1, passed
Tensile Strength MD (N/50mm) – EN12311-1 >700; max.890/>900
Tensile Strength CD (N/50mm) – EN12311-1 >400; max.861/>900
Tear Resistance MD(N) – EN 12310-1 >170; max.176/180

Supporting Information

Technical Sheet System – Hot Climates

Technical Sheet System – Cold Climates

Guidance Fire – Hot Climates

Guidance Fire – Cold Climates


BBA Certificate – Vapour FR

BBA Certificate – Envelope FR System

System accessories

Effisus 2Adjoin DF Tape

Double sided adhesive tape for fastening breather membranes to the facade structure

Effisus 2Bond DS

Solução para selagem entre superfícies ou selagem de perfurações

Effisus Bonding KF+P Adhesive

Solvent free adhesive for Effisus Ecofacade Membranes

Related Products

A1 Fire Rated
AVCL Membrane

A1 Fire rated
Breather FR Membrane

A2 Fire Rated
Breather FR System