Moisture-variable vapor barriers

Humidity-variable vapour control layers

Variable Vapor Control Membranes

Maximum Protection for Modern Constructions

Variable vapor control membranes provide highly reliable airtightness and protect constructions against moisture damage. Unlike traditional vapor retarders, they adapt their diffusion resistance to temperature and humidity conditions.

During winter, these systems act as highly diffusion-resistant barriers to prevent moisture from entering the insulation. In summer, they become diffusion-open and allow controlled drying of the structure, significantly increasing the safety of the entire construction.

Variable sd-values
Reliable drying capability
Ideal for renovation projects
High safety in timber construction

DASATOP Vapor Barrier 150 m²
Sub-and-top vapor barrier and airtight membrane for all constructions with diffusion-open underlayment or underlayment membranes.
365,00 EUR
2,43 EUR per
incl. 19% tax excl. Shipping costs
INTELLO X  75 m² - All-round hydrosafe® high-performance vapour control membrane
UV-resistant membrane for internal/external insulation build-ups (incl. blown-in). Suitable for diffusion-open or -tight roofs.
250,50 EUR
incl. 19% tax excl. Shipping costs
INTELLO X Vapor Barrier 150 m²

UV-resistant membrane for internal/external insulation build-ups (incl. blown-in). Suitable for diffusion-open or -tight roofs.

513,00 EUR
incl. 19% tax excl. Shipping costs
INTELLO X conect 75 m² - Hydrosafe® high-performance vapour control membrane with self-adhesive strips
Humidity-variable airtight/vapour control membrane for pitched, flat and green roofs. Works with fibrous insulation incl. blown-in; external retrofits between two layers require mineral/stone wool only.
273,60 EUR
3,65 EUR per
incl. 19% tax excl. Shipping costs
INTELLO X PLUS Vapor Barrier 75 m²
For use on the inside of cavity insulation as well as in external insulation on a solid substrate in combination with all fibrous insulation materials - including blown-in insulation materials.
273,00 EUR
3,64 EUR per
incl. 19% tax excl. Shipping costs
INTELLO conneX Connection Strip 21 cm Airtight Hydrosafe
Connection strip for sealing joints (e.g. floor-to-concrete slab connections, wood-based panels), for connections at the purlin, and for repairing leaks in roofs, walls, ceilings and floors.
42,00 EUR
0,84 EUR per
incl. 19% tax excl. Shipping costs
INTELLO conneX Connection Strip 37.5 cm
Connection strip for sealing joints (e.g. floor-to-concrete slab connections, wood-based panels), for connections at the purlin, and for repairing leaks in roofs, walls, ceilings and floors.
77,00 EUR
1,54 EUR per
incl. 19% tax excl. Shipping costs
INTELLO conneX Connection Strip 50 cm
Connection strip for sealing joints (e.g. floor-to-concrete slab connections, wood-based panels), for connections at the purlin, and for repairing leaks in roofs, walls, ceilings and floors.
99,00 EUR
1,98 EUR per
incl. 19% tax excl. Shipping costs
17 to 24 (from a total of 31)

Typical Applications

  • Roof renovations
  • Timber frame construction
  • Between-rafter insulation
  • Diffusion-open constructions
  • Renovation of existing buildings
  • Demanding wall assemblies

What Matters Most

  • Professional airtight installation
  • Reliable sealing of all joints
  • Compatible tapes and sealing systems
  • Durable sealing of penetrations
  • Controlled drying of constructions
  • Long-term protection of insulation systems

More Safety for Critical Constructions

Especially in complex or uncertain building assemblies, variable vapor control membranes provide a high level of safety and flexibility. Their drying potential significantly reduces moisture risks and supports long-lasting constructions.

Proper Installation of Variable Vapor Control Membranes

For a reliable airtight layer, not only the right membrane is important, but also professional installation. All joints, overlaps and penetrations must be sealed permanently airtight to prevent moisture intrusion.

Special attention should be paid to transitions between adjacent building components as well as cable and pipe penetrations. Matching tapes, sealants and grommets ensure durable and secure sealing.

As a specialist supplier, we offer variable vapor control membranes and matching accessories for professional installation and long-term protection of building constructions.

Frequently Asked Questions

What does variable vapor control mean?

Variable vapor control membranes change their diffusion resistance depending on temperature and humidity conditions.

When are variable vapor control systems recommended?

They are especially suitable for renovation projects, timber constructions and diffusion-open building assemblies.

Why is airtight sealing important?

Only airtight sealing prevents moisture intrusion and permanently protects the insulation system against damage.