PROVEX
IZOTEX® PROVEX is a flame-retardant, vapour-permeable roof underlay for roof constructions. It protects the insulation layer against rain and moisture ingress from the outside, supports moisture release from the construction to the outside, and meets watertightness class W1.
- Flame-retardant, class B-s1,d0
- Vapour-permeable with a low sd value – supports moisture release to the outside
- Watertightness class W1 – protects the insulation layer against rain and moisture ingress
- PROVEX TAPE completes the system at overlaps and connection points
Technical information
Overview of the key technical properties and performance values of IZOTEX® PROVEX.
| Product Name | PROVEX - Flame-retardant, vapour-permeable roof underlay |
| Composition | Three-layer PP / TPU / PP construction |
| Roll Width | 150 cm |
| Roll Length | 50 m |
| Mass per Unit Area | 160 gsm |
| Watertightness | W1 |
| Sd Value | 0.1 m |
| Air Permeability | < 0.02 m³/(m²·h·50 Pa) |
| Color | Grey |
| Reaction to Fire | Class B-s1,d0 |
| Working Temperature | -10 °C / +50 °C |
| Storage | Can be stored for 12 months at +15 °C to +25 °C in a dry environment, away from direct sunlight. |
What we offer
Flame-retardant, vapour-permeable roof underlay for safe and long-lasting roof constructions.
Flame-Retardant
Reaction to fire class B-s1,d0 for increased safety in roof systems.
Vapour-Permeable
Supports moisture release from the construction to the outside.
Low sd Value
sd value of 0.1 m for high water vapour permeability.
Watertight W1
Tested watertightness according to EN 1928.
Protects the Insulation
Protects the insulation layer against rain and moisture ingress from the outside.
Mechanical Strength
Multi-layer structure supports tear resistance and dimensional stability.
UV-Resistant
Suitable for temporary UV exposure during the construction phase.
Wide Roll Width
150 cm roll width for efficient installation over large roof areas.
Frequently asked questions
Everything you need to know about IZOTEX PROVEX – quickly and clearly.