Roof construction  >  Air- and vapour barriers  >   CaVap 20 SK

Air- and vapour barriers


CaVap 20 SK is an all-round vapour barrier for all ventilated and unventilated, diffusion permeable roof and wall constructions. The vapour barrier consists of a polypropylene non-woven fibre with a copolymer coating. The membrane is equipped with an integrated self-adhesive tape, which is used as a processing aid. Also available without self-adhesive strips as CaVap 20. CaVap 20 SK is translucent and thus allows the rafters behind the vapour barrier to remain visible. Thanks to its high flexibility, CaVap 20 SK can also easily adjust to complex details.

When working with the material it is necessary to observe the applicable standards, the generally recognized rules of manufacturers as well as the CaPlast laying information. Subject to technical modifications.

Fields of application

• Vapour barrier for internal construction
• Ventilated roof constructions
• Unventilated, wall and roof constructions which are open to diffusion
• Timber-framed building styles
• Renovation work and new constructions


• Multi-use vapour barrier
• Good inherent stability through reinforced non-woven fibre
• Translucent (rafters are visible)
• Very high anti-tear values
• Easy and secure working
• Alkali resistant

Technical Data

Weight (g/m²)   →   110 ± 10 %
Building material   →   E
sd-value (m)   →   20 ± 2/ ± 5
Tear resistance L/T (N/5 cm)   →   200/135
Elongation L/T (%)   →   105/120
Nail tear resistance L/T (N)   →   140/180
Shearing strength of the joint seam (N)   →   50
Watertightness (kPa)   →   Resistant to 2 kPa
Roll width/Roll length (m)   →   1.50/50     |    3.00/50