Certifications
Whether it’s security rating, fire resistance, thermal transference or acoustic ratings, all our products are third-party tested to give you peace-of-mind that they perform how we say they do.
Investing in Testing
We make continual improvements to our product range in line with changing regulatory demands – for example, CE Marking. In addition, our research and development team regularly send doors for testing with independent bodies to gain certification. These include Secured by Design (the official police initiative to ‘design out crime’), the Loss Prevention Certification Board (LPCB) and Warrington Fire.
Intruder & Blast Resistant Doors
We offer a broad range of security rated steel door solutions – these include SECUR-DOR (available with PAS 24 , STS202 BR3 and ENV 1627 Level 4 certifications as required), and TUFF-DOR (LPS 1175 certified to SR2, SR3 or SR4 levels).
Certified to PAS 24 and approved by Secured by Design, TUFF-VENT offers maximum free airflow whilst maintaining strength and security, whilst GLAS-DOR provides a fire rated fully glazed solution that’s also burglary-resistant (PAS 24 and RC3 and RC4 classes in accordance with standard ENV 1627).
Fire Resistance
We offer a broad range of certified fire resistant doors including our highly versatile INNA-DOR and OUTA-DOR products, which both offer up to 4 hours fire resistance if needed.
GLAS-DOR combines fire integrity and insulation with other requirements such as acoustic reduction, ballistic resistance and security certification, whilst we can offer two security doors – TUFF-DOR 2.1 and SECUR-DOR 2.1 – with 60 minutes fire rating without compromising on security.
We have had third party testing carried out to certify that our fire exit doors, when fitted with panic exit devices, meet the criteria for panic devices according to the requirements of BS EN 179:1998 and BS EN 1125:1997.
Robust fire doors have been tested to and passed the following standards.
Integrity only up to E240, in mild and stainless steel to:
- BS 476-20: 1987 & BS 476-22: 1987
- BS EN 1634-1: 2014 + A2: 2018
Fire rating (integrity only) states how long the door can stop flames from passing through, without considering its ability to block heat.
Integrity and insulation (such as that available with GLAS-DOR) prevents not just the transference of flames, but also the transference of heat. EI120 maintains the both integrity and insulation for 120 minutes, whereas EI90/60 will maintain integrity for 90 minutes, and insulation for 60 minutes.
Security Doors
Our range of security doors have been tested to and passed BS EN 1627: 2011. TUFF-DOR security doors are accredited by LPCB. Certified to LPS 1175 SR2 – SR4, they are listed on the LPCB Red Book Live Website.
SECUR-DOR 2.1 is certified to PAS 24 (2022) and available fire rated.
Our security doors have also been tested to and passed Warrington Exova Certisecure STS 202 standard: here
All Robust security doors, in both personnel access and fire escape designs, are also included in the ‘Secured by Design,’ scheme. ‘Secured by Design,’ is the official UK Police initiative to ‘design out crime,’ and covers not only doors but also windows, gates, etc. To satisfy this standard, all products must be a minimum of PAS 24 approved.
Robust security doors have also been tested to European security standard DD ENV 1627:1999.
Acoustic Performance
The acoustic rating measures how well the door blocks sound from passing through, helping to keep noise inside or outside of a room.
Measured in decibels (dB), quite simply the higher the value, the better the performance.
| dB | Performance | Description |
| 25-30 dB | Minimal | Reduces normal conversation noise; suitable for basic privacy. |
| 31-35 dB | Average | Blocks loud speech; good for offices and meeting rooms. |
| 36-40 dB | Good | Reduces most loud noises; good for schools, hospitals or flats. |
| 41+ dB | Very Good | High soundproofing; used in studios or noisy industrial areas. |
Please ask us for information about the acoustic performance of our products, as this will vary depending on your specification.
Thermal Rating
This is used to measure how well the door keeps heat inside during winter, and outside during summer.
A better rating provides improved energy efficiency; reducing energy consumption and costs. The unit of calculation is W/(m²K) – the lower the value, the better the performance, as the value references how much thermal energy is being transferred.
| U Value | Description |
| 2.0 – 1.8 W/(m²K) | Basic insulation; an older door standard. |
| 1.7 – 1.4 W/(m²K) | Good insulation; meets many build regs for homes. |
| 1.3 – 1.0 W/(m²K) | Very good insulation; energy efficient buildings. |
| Below 1.0 W/(m²K) | Excellent insulation; passive house standard. |
The maximum permitted U value for pedestrian doors in new build residential and commercial properties is 1.5 W/(m²K) in Scotland, and 1.6 W/(m²K) in the rest of the UK (as per Part L of the Building Regulations).
OUTA-DOR THERM can achieve a U value as low as 1.3 W/(m²K), and we offer fire rated doors to 1.5 W/(m²K) for both compliance and safety.
Thermal values vary dependent on product configuration and the inclusion of apertures, so please contact our estimators to discuss the calculation for your specified product.
Smoke Rating
This refers to how well the door prevents smoke from passing through the gaps, helping to keep escape routes safe in a fire.
It’s measured by leakage rate at a given pressure, in units of m³/h/m².
| Smoke Rating | Description |
| ≤25 m³/h/m² at ambient temperature | Prevents smoke spread in everyday conditions (cold smoke). |
| ≤25 m³/h/m² at 200°C | Maintains smoke control in hot fire conditions. |
| Dual rated (ambient & hot) | Offers protection against both cold and hot smoke. |
Robust smoke rated doorsets are tested to BS EN 1634-3.
Endurance Testing
Our doors have recently undergone cycle testing to enable the doorset to be CE marked in accordance with UK legislation. Robust UK were one of the first manufacturers in the UK able to fully CE mark our doorsets in accordance with BS EN 14351-1:2006 Windows & Pedestrian Doorsets (External).
The opening and closing cycles of our doors have been tested to and passed Class 7 (500,000 cycles) of BS EN 1191:2000.
Environmental Testing
Our doors have undergone testing to prove their suitability for use for expected UK weather conditions to BS 6375-1: 2004 Weather Tightness, which incorporates specific tests for:
- Air Permeability to BS EN 1026:2000
- Water Tightness to BS EN 1027:2000
- Resistant to Wind Loading to BS EN 12211:2000
Hardware Standards
In order to continue to provide quality products, we ensure that, where available, the hardware we use is regularly tested to the relevant European standards, in particular:
- Hinges to BS EN 1935:2002
- Cylinders to BS EN 1303:2055
- Door Closers to BS EN 1154:1997
- Locks & Latches to BS EN 12209:2024
- Lever Furniture to BS EN 1906:2012
CE Marking
Robust are leading the field in our ability to provide full CE marking for our full range of steel doors in accordance with BS EN 14351-1:2006 Windows & Pedestrian Doorsets (External). This legislation requires that manufacturers of non-fire industrial doors apply the CE mark on their products because they are covered by a harmonised standard under the new Construction Products Regulation.
From the 1st November 2019 it became mandatory for external fire-rated doorsets to be CE marked to BS EN 14351-1 and EN 16034. EN 16034 involves tests for external doorsets with fire resistance and/or smoke control characteristics and cannot be used on its own for CE marking purposes. It must be used in conjunction with BS EN 14351-1 and its performance is declared on the DoP and CE label we attach to our doorsets.