Our standard Vapour Control Membrane is a good alternative to the expensive membranes with variable sd coefficient. It´s made of of a layer of polypropylene non-woven fabric and a special functional film. The most competitor membranes are using the same technology, even the more expensive brands like pro c.... or Iso...
The low sd coefficient of 8 makes the membrane diffusible - a small amount of vapour is able to move through the membrane both ways. This feature prevents condensation in the building structure.
The Vapour Control Membrane is CE certified and tested in accordance to EN 13984.
Beside the vapour control function, the membrane is completely airtight.
To achieve the best airtight values, we highly recommend the use of a double sided tape, e.g. our Double Sided Butyl Tape for the fixing to the joists and rafters. Alternatively the application of our Nail Sealing Tape to the joists and rafters, before installing the membrane, will improve the air tight performance too.
Dimension: 1.5 x 50m / 75m²
sd value: 8
Vapour-permeability: 2-3 g/m²/24h
Weight: ~90 gr. /m²
Water Tightness: W1
UV Resistance: up to 2 months
Weight per roll: ~6.4 kg