Over-Foil Firevap – Non-Combustible Heat-Reflective Vapour Barrier
Key advantages
• Non-combustible vapour barrier
• Reaction-to-fire classification A2-s1,d0
• Reflects up to 95% of radiant heat
• Highly resistant to water vapour penetration
• Can be installed in direct contact with insulation materials
• Resistant to tearing and stretching
• Simple, fast installation
• Made in Italy
Why this product
Over-Foil Firevap is designed for projects where a vapour barrier must also meet demanding fire-resistance requirements.
The product combines a pure aluminium foil with fibreglass fabric, protecting the insulation layer and the structure while maintaining fire safety, reflecting radiant heat and preventing water vapour transmission.
Technical description
A heat-reflective vapour barrier made from a combination of pure aluminium and fibreglass fabric.
The membrane is intended for wall, roof and ceiling systems that require a vapour barrier with high fire resistance. It can be installed in direct contact with insulation materials and helps maintain the system’s performance over time.
Applications
• Plasterboard walls
• Roofs
• Ceilings
• Light steel structures
• Public buildings
• Hospitals
• Schools
• Industrial buildings
• Buildings requiring high fire resistance
Technical specifications
Material:
- Pure aluminium and fibreglass fabric
Thickness:
- 0.1 mm
Weight:
- 140 g/m²
Roll dimensions:
- Width: 1.20 m
- Length: 50 m
- Area: 60 m²
Roll weight:
- 9 kg
Water vapour transmission (Sd value):
- Over 2000 m
Vapour diffusion resistance factor (μ):
- 20,000,000
Temperature resistance:
- -36°C to +180°C
Emissivity:
- 5%
Thermal performance
• Reflects up to 95% of radiant heat.
• Improves thermal insulation when installed as part of a building system.
• Can be installed in direct contact with the insulation material, with no separation required.
Acoustic performance
• Not intended as sound insulation.
• Serves as a vapour barrier and a radiant heat reflector.
• Can be incorporated into acoustic systems as part of the wall or ceiling assembly.
Fire resistance
• Reaction-to-fire classification:
A2-s1,d0 per EN 13501-1.
• Suitable for buildings with stringent fire safety requirements.
• Helps protect the insulation layer and the building envelope in the event of fire.
Standards
• EN 13501-1 – Reaction-to-fire classification A2-s1,d0
• EN 12572 – Water vapour transmission (Sd and μ)
• EN 12114 – Airtightness
• EN 16012 – Emissivity
• EN 12311-2 – Tensile strength
• EN 12310-1 – Tear resistance
• CE 13984 – Vapour barrier membranes for construction
Installation
• Can be installed directly onto the insulation material.
• Can be fixed with nails, screws or staples.
• Cuts easily with a utility knife.
• Seal the joints with the dedicated Firevap aluminium tape to maintain the system’s fire classification.
• Make sure the vapour barrier is continuous across the entire envelope.
