Soundproof doors
Customer-specific Solutions
Certificates Available
Turnkey
Multiple features combined in one door
With ALARA doors, you have the assurance of the best doors for your project. ALARA has developed different functionalities that can also be chosen in combination:
Sound Insulation
Fire Resistance: 30, 60 or 90 minutes and escape operation
Burglary Resistance
EMC/EMP Safety
Access Control
For more information or to discuss your specific application, contact one of our specialists using the contact form!
Sound Insulation
Material
ALARA’s soundproof steel doors are made of a double-walled door leaf made of a galvanized steel sheet of different thicknesses. The doors are fitted with damping and insulating material, filled with a high-quality absorption package. The doors can also be made in aluminum or stainless steel.
ALARA produces every door according to customer specifications. The dimensions are provided by you or measured by us at your request. ALARA offers you the assurance of choosing the best doors for your project.
Contact the construction sales department for your desired data sheets, drawings and specification texts.
Fire Resistance: 30, 60 or 90 minutes and escape operation
A safe living and working environment is important. Fire safety plays a very important role in this. In order to ensure a fire-safe passage, fire-resistant doors are necessary or even required. ALARA doors can therefore combine fire-resistant as well as sound-insulating properties.
ALARA’s fire-resistant exterior and interior steel doors are tested in accordance with the strict European Standard EN 1634-1. This standard describes exactly how a door should be tested and under what conditions.
Exterior doors can be supplied with CE marking, according to the specifications and classifications below:
Certificate of Constancy of Performance:
- CE fire resistance doors N1812-CPR-2309, according to standards EN 14351-1:2006 + A:2016 and EN 16034:2014
- Smoke resistance rating: C0a and C0200
| E | I1 | I2 | W | t |
| E | — | — | — | 30 /60 / 90 |
| E | I1 | — | — | 30 / 60 |
| E | — | I2 | — | 30 / 60 |
| E | — | — | W | 30 / 60 / 90 |
Fire doors custom-made:
Our single-leaf and double-leaf fire doors are custom-made to comply with your desired specifications. You can find the fire resistance ratings in the table above. If desired, our fire doors can also be equipped with windows.
The rough openings in meters are based on a block frame with 1-point locking (larger dimensions with multi-point locking available on request).
- Single-leaf doors swinging away from the fire and toward the fire, we can supply with a maximum width of 1,489 mm (W) x a maximum height of 3,361 mm (H).
- Double-leaf doors swinging away from the fire and toward the fire, we can supply with a maximum width of 2,914 mm (W) x a maximum height of 3,361 mm (H).
Escape Operation: Certificate of Constancy of Performance:
- Certification Scheme: NEN-EN 14351-1; Escape Doors.
- CE fire resistance doors 0960-CPR-SKGIKOB.010524.02.ENG, according to EN 179 and EN 1125 standards.
- Lever-operated door release systems must meet requirements of EN 179.
- Emergency exits with push bars must meet requirements of EN 1125.
Burglary Resistance
ALARA produces burglary-resistant solutions in different classes:
- Resistance class 2
- Resistance class 3
Officially tested and certified in accordance with EN 1627:2011
EMC/EMP Safety
For military, police and data security applications, ALARA supplies customer-specific EMC/EMP secure doors. Thanks to special developments in the field of capturing and properly dissipating electro magnetic signals, both eavesdropping and intrusion via electromagnetism can be minimized.
Access Control
ALARA has years of experience integrating various access control systems for doors. This often requires an electrical connection, which we realize without affecting the existing properties of the door – such as fire resistance, sound insulation or RF shielding. Our specialists will be happy to advise you on the optimal combination of door performances and the access control system you require.
Acoustic Performance ALARA Doors: Special Insulation Values per Door Type
High acoustic performance for every application. Our sound-insulating doors are designed to provide optimal noise reduction in industrial, technical, and commercial environments. Depending on the door type, the doors achieve excellent acoustic performance of up to Rw 56 dB, significantly reducing noise disturbance.
Thanks to our custom-made solutions, the doors can be perfectly tailored to the specific requirements of your project, including dimensions, finish, fire resistance, and frequency of use. This makes them ideal for applications such as machine rooms, technical facilities, power plants, production facilities, HVAC installations, and other environments where sound insulation is crucial. For more information, please refer to our specification texts.
All acoustic doors are designed with a focus on durability, functionality, and certified performance. ALARA is part of the IPCOM Group.
| 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | Hz | Rw,p (C, Ctr) | |
| AL-D/D45 | 19 | 32 | 41 | 40 | 42 | 49 | 51 | – | dB | 45 (-2, -4) |
| AL-D/D50 | 11 | 36 | 43 | 47 | 51 | 51 | 52 | 46 | dB | 50 (-1, -4) |
| AL-D/D52 | 17 | 36 | 46 | 49 | 52 | 54 | 58 | 52 | dB | 52 (-1, -4) |
| AL-D/D54 | 21 | 41 | 48 | 52 | 55 | 55 | 60 | 53 | dB | 54 (0, -3) |
| AL-D/D56 | 29 | 43 | 49 | 52 | 56 | 59 | 63 | 53 | dB | 56 (-1, -4) |
| AL-D/D56-H | 34 | 45 | 48 | 52 | 55 | 55 | 57 | – | dB | 54 (0, -2) |
Certificates
ALARA is a forerunner in certified sound-insulating interior & exterior doors. Not only the most diverse combinations have been tested and certified, but also the most far-reaching features.
Customization
ALARA has high-quality calculation models, high-end engineering capabilities and advanced production methods. This gives us the ability to meet very specific requirements and produce custom projects of high quality.
Taking care from A-Z
ALARA is a committed and flexible organization with extensive production facilities. We provide engineering, production, delivery, assembly and maintenance of the doors. You can rest assured that complex issues and both standard interior and exterior doors are in good hands with us.
Reference Projects
Frequently asked questions
A soundproof door is a specially designed door that significantly reduces sound transmission between two spaces. In industrial environments, acoustic doors are used to combine sound insulation with safe and easy access to technical installations, machine rooms, or production areas.
At ALARA, acoustic doors are fully custom-designed and integrated into sound-insulating walls, enclosures, and technical rooms. This preserves the acoustic performance of the overall structure while keeping installations easily accessible for inspection and maintenance.
A soundproof door is suitable when a room needs to be accessed regularly without compromising sound insulation. Common applications include:
- Machine rooms
- Generator rooms
- Technical installations
- Power plants
- Data centers
- Compressor rooms
- Industrial production facilities
Integrating an acoustic door keeps the space easily accessible while effectively reducing noise.
A soundproof door reduces noise through a combination of sound-insulating materials, specialized seals, and a heavy-duty door construction. Key components include:
- Multi-layer door leaves
- Acoustic seals
- Automatic drop seals
- Insulated frames
- High-quality locking mechanisms
These components prevent noise from escaping through gaps or openings.
The level of noise reduction depends on the application and the required performance of the overall structure.
During the design process, ALARA matches the door to the acoustic properties of the surrounding wall or enclosure. This prevents the door from becoming a weak point within the system and ensures that the required sound insulation is maintained.
Yes. In addition to standard personnel doors, ALARA also supplies large maintenance doors and double doors for installations that need to be regularly accessed using equipment or lifting devices.
This allows maintenance to be carried out efficiently without removing complete panels.
Yes. Every application has different requirements regarding dimensions, frequency of use, safety, and maintenance. ALARA therefore develops custom doors tailored to:
- Available space
- Required noise reduction
- Safety regulations
- Fire safety, where required
- Maintenance requirements
- Intensity of use
Yes. Acoustic inspection windows can be integrated where required. This allows installations to be visually inspected without opening the room.
These windows are designed to preserve the acoustic performance of the door.
Yes. ALARA acoustic doors are designed for long-term use in demanding industrial environments.
Depending on the application, the design takes into account:
- Heavy mechanical loads
- High frequency of use
- Moisture
- Dust
- Chemical exposure
- Corrosion
Yes. Soundproof doors often form part of an overall solution. They are commonly combined with:
- Sound-insulating enclosures
- Sound-insulating walls
- Custom containers
- Ventilation sets
- Acoustic grilles
This creates a single integrated acoustic system.
A soundproof door must not only reduce noise but also be safe, durable, and practical.
By combining custom engineering with high-quality materials, ALARA develops doors that integrate perfectly with the overall installation and continue to operate reliably for many years.
