In Gennep, Enexis upgraded its transformer station with higher-capacity transformers and noise-reducing solutions from Merford, carefully tailored to the surrounding environment. This approach increases grid capacity while reducing noise disturbance for nearby residents.
Customisable steel doors
M-series steel doors built for performance and reliability
High-performance steel doors that combine sound insulation and security. Tailored for demanding environments such as data centres, commercial buildings, theatres, event venues and industrial facilities.
Discuss your project with our engineers – no obligation.
Trusted in environments where performance matters most
Customisable steel doors
M-series steel doors built for performance and reliability
High-performance steel doors that combine sound insulation and security. Tailored for demanding environments such as data centres, commercial buildings, theatres, event venues and industrial facilities.
Trusted in environments where performance matters most
M-series doors
Over 35 years of expertise in customisable steel doors
For more than 35 years, Merford has been designing and manufacturing high-quality steel doors in its own production facility in the Netherlands. Every product is engineered, produced, and prepared for on-site installation under one roof, ensuring complete control over quality and performance.
The M-series range is applied across various sectors, each with its own technical and safety requirements. Thanks to our flexible production and deep expertise in acoustics and construction, we deliver tailored door solutions that meet high specifications.
Endless possibilities
Combine your desired features
Each M-series door can be configured with a combination of properties and accessories to meet specific acoustic, fire, safety and design requirements.
Core features
Fundamental properties that define performance.
Sound insulation
Long-lasting performance for a quieter environment.
Fire resistance
Certified performance to contain and delay fire spread.
Smoke control
Prevents smoke infiltration in critical situations.
Burglary resistance
Reinforced protection against forced entry.
Bullet resistance
Reliable protection in high-security environments.
Air and gas tightness
Maintains fully sealed and controlled conditions.
All features are tested and certified according to European standards, ensuring reliable performance and compliance in every application.
Additional functions
Additional functions that enhance safety and control.
Anti-panic function
Enables safe and rapid evacuation during emergencies.
Access control
Integrated systems for secure entry management.
Specialised options
Solutions for highly specific technical environments.
Ventilation
Combines airflow with safety performance.
ATEX model
Certified safety for explosive-risk zones.
Transformer model
Specially designed for transformer rooms.
Performance for every environment
A safe and reliable door for every situation
The M-series offers the flexibility to combine a wide range of performance features within a single design. Each door can be manufactured in virtually any required size and configuration: single or double leaf, left- or right-hinged. Depending on the application, additional features such as sound insulation, fire resistance or burglary resistance can be integrated.
Thanks to the extensive range of options, every door from the M-series can be fully tailored to the technical and safety requirements of your project. This ensures long-term reliability, functionality and peace of mind.
Where design meets engineering
The foundation of M-series
Composition and construction
Each M-series door features a durable, double-walled leaf made from electrolytically galvanized steel sheets, complete with a steel frame. The internal core is filled with an insulation package tailored to meet the required acoustic, fire, or safety properties.
Custom finishing and hardware
Doors can be finished with a powder coating, stainless steel or a special C5 coating for extra corrosion protection. They are also available in any RAL colour, so they match the look of your project. There is a wide range of hardware and emergency exit systems available. This ensures the door meets the right functional and safety requirements.
Application-oriented performance
Every situation demands a unique solution. M-series doors can be configured to combine multiple properties including sound insulation, fire resistance, burglary protection, or bullet resistance, ensuring optimal performance in any environment.
Maximum sound insulation
Designed to reduce both low- and high-frequency noise, M-series doors achieve sound insulation ratings up to Rw 56 dB.
Products
M-series doors
Products
Modular systems
BIM & specification service
Generate the right specification text for your project
Use our BIM & specification service to quickly find the right Merford product and generate matching specification text for your project.
Proven in practice
We turn challenges into results
We're here to help
Answers to common questions
+150
Our experts are here to help you find the right solution for your challenge.
Monday to Friday — between 09:00 and 17:00
Which certifications do M-series doors have?
The performance of M-series doors, such as sound insulation, fire resistance and burglary resistance, is tested and certified according to European standards. This ensures reliable performance and compliance with regulations.
What does a custom steel door cost?
The cost of an M-series door depends on the size, required performance and additional features. This may include sound insulation, fire resistance or security options. Please contact us for a tailored quotation based on your project.
Can M-series doors be installed in existing buildings?
Yes, they can. M-series doors are suitable for both new builds and existing buildings. We assess each project individually and ensure the door fits the existing structure and requirements.
What is the lead time for an M-series door?
The lead time depends on the specifications and complexity of the project. As each door is custom-made, we align the planning with the design, production and installation. We always provide a clear indication of the delivery time.