High-performance bifold doors for expansive indoor-outdoor living
MB-86 FOLD LINE HD
MB-86 FOLD LINE HD is a premium aluminium bifold door system designed to create wide, seamless openings that connect indoor spaces with the outdoors. Offering smooth operation, excellent thermal performance and the ability to build large configurations – up to eight panels in corner or panoramic layouts – it delivers modern comfort, design flexibility and compatibility with the MB-86N system.
Three-stage drainage system
Continuity of the shell seal with different glazing packages
Modern fireproof inserts in metal matrix
Superior thermal efficiency
ATF 50EI
Comprehensive fire protection and excellent sealing performance.
The system allows the construction of flat walls with fire resistance of EI 30 and EI 60, as well as skylights with REI 20 and REI 45, ensuring a high level of fire safety.
Thanks to the solutions used, the system also guarantees excellent waterproofing and resistance to air permeability, making it an ideal choice for buildings with higher insulation and security requirements.
Parameters and details
| Width of column and transom sections | 50 mm |
| Depth range of column and transom sections | 0-170 mm |
| Glazing range | up to 64 mm |
| Load bearing capacity of glass | Up to 540 kg |
| Thermal insulation U of the section | from 0.6 W/m2K |
| Fire resistance class | EI 30, EI 60 |
| Fire resistance of skylights based on ATF 50EI | REI 20, REI 45 |
| Air permeability | AE 1500 Pa |
| Waterproof | RE 2400 Pa |
| Wind load resistance | 2400 Pa |
| Impact resistance | Class E5/I5 |
| Safety tests | ±3600 Pa |
Get in touch with us!
Our process is a combination of expert knowledge, cutting-edge technology and a customized approach, so you get solutions that stand out in quality, functionality and design. Our team of experts will help you identify your needs, advise you on the best solutions and create a concept that fits perfectly into your project.


