The Gerband SD Control Airtight Vapour Control Membrane – Fixed Sd is a high-performance solution designed to provide reliable airtightness and vapour control in roof and wall constructions. Suitable for internal walls and sloped roofs in new builds and retrofit projects, it offers a fixed vapour resistance level of Sd 2.3m for consistent indoor climate and energy efficiency.
As a reliable vapour control layer, this membrane prevents condensation, protecting structures from mildew growth and structural damage. Installed indoors as a vapour barrier (AVCL), it features excellent ageing resistance for long-term durability. The product meets CE standards (DIN EN 13984) and complies with EnEv requirements for both new construction and refurbishment projects.
Key Features & Benefits
- Reliable Airtightness & Vapour Control – Reduces air leakage and moisture migration.
- Fixed Sd Value 2.3 m – Provides consistent vapour resistance.
- Diffusion-Supporting Vapour Barrier – Allows controlled diffusion to prevent trapped moisture.
- Outstanding Ageing Resistance – Ensures long-term performance.
- Double-Layered Laminated Film – Enhances tear resistance and ease of installation.
Applications
- Internal vapour control membrane for roofs and walls
- Suitable for sloped roof constructions and internal wall systems
- Compatible with all building types – residential, commercial, and industrial
- Applicable for both new builds and refurbishment projects
Application Guide
- Store in dry rooms at +5°C to +25°C, protected from UV radiation.
- Apply membrane perpendicular to studs, rafters, or joists.
- Fix with staples every 150mm or double-sided tape.
- Use Gerband 586 or a suitable grommet for penetrations.
- Bond overlaps, penetrations, and repairs with Gerband 586 or equivalent tape.
- For connections to concrete or masonry, use Fortax 6400.
- Ensure a 100mm overlap of membranes and tape, and seal all corners completely.
Technical Highlights
| Property |
Specification |
| Sd Value |
2.3 m (fixed) |
| Function |
Airtightness & vapour control layer (AVCL) |
| Application Area |
Internal walls and sloped roofs |
| Construction Types |
All types – new builds & retrofits |
| Certification |
CE Certified (DIN EN 13984), EnEv compliant |
Why Choose Gerband
Gerband membranes are trusted by construction professionals for their precision engineering, durability, and compliance with European quality standards. The SD Control Airtight Vapour Control Membrane – Fixed Sd provides reliable airtightness, condensation protection, and long-term performance for energy-efficient and healthy buildings.
