Dutch masters of steel since 1667
Dutch Masters of Steel since 1667
The interior visible through MHB folding doors of a residence in Amsterdam, the Netherlands long
The interior with MHB folding doors of a residence in Amsterdam, the Netherlands
Huge MHB steel folding doors in Zijdebalen, utrecht
Huge MHB steel folding doors in Zijdebalen, utrecht a sideview
MHB SL30-ISO 2018 CH Metallover Nyon st Jean (4)
Looking outside at a castle Nyon, Geneva through open MHB folding door
Partial MHB folding door with UV glass at the restaurant cheval blanc Geneva, Switzerland
Looking outside in Rotterdam, The netherlands through open MHB folding door

Ultra-slim steel folding doors

Integrate your indoors with the outdoors with MHB’s steel folding doors. With an ultra-slim sightline of only 1 5⁄8”, these doors extend your home or office to the outdoors, while providing the strength and insulation of our SL30-ISO® thermally broken steel profile system. They guarantee comfort and an abundance of natural light inside. With their sleek, modern design, these doors are the perfect choice for those seeking to seamlessly blend their indoor and outdoor spaces.


3d render MHB Steel folding door completely closed

Maximum useability

You have the freedom to decide how your folding door opens. Do you want it to open toward one side, both sides, or asymmetrically? We have folding doors for all types of spaces, large and small. All of our steel folding door systems include a standard entry for quick and easy access without disrupting the design. This allows you to choose the configuration that best suits your needs and preferences.

High quality components

Our steel folding doors come with stainless-steel floor and ceiling rails that enable smooth, effortless opening, no matter the size. The upper rail supports the weight of the panels, while the bottom rail ensures perfect alignment. The secure locking system keeps out dust, rain, and cold, ensuring that your interior stays comfortable and protected.

3d render MHB Steel folding door three quarters closed
Construction site with large MHB folding doors at zijdebalenstraat Utrecht, the Netherlands

Steel folding doors with immense dimensions

The innovative SL30-ISO® profile system and the power of steel enable us to craft exceptionally large folding doors. The dimensions of any standard panel can be up to 9′ 10 1⁄8” by 3′ 3 3⁄8”. All of MHB’s glazing retention & partition options are available for our folding doors, this allows you to design folding doors that perfectly match your vision and needs.

3d render MHB Steel folding door completely opened



Create the perfect harmony between indoors and outdoors