Market Leading Fire Certification

BS 8414 Fire Testing to LPCB Certification & Red Book Listing for Dryvit Systems

Alongside our A2-s1, d0 Roxsulation Pro System, Dryvit has carried out an extensive programme of fire testing to become one of the first external insulated render manufacturers to achieve BR 135 classification tested in accordance with BS 8414-1 and BS 8414-2 for a range of its External Wall Insulation (EWI) Systems. This testing continues to satisfy Building Regulations in England & Wales for fire safety when installed on defined non-domestic buildings over 18 metres in height and in Scotland on defined domestic and non-domestic buildings over 11 metres in height. The BR 135 classification is called for as an alternative guidance to non-combustibility compliance for defined building types and applications.

In addition to the BR 135 classification the range of systems have also been assessed and Certified by the Loss Prevention Certification Board (LPCB) to the more stringent requirements of their LPS 1581 & LPS 1582 scheme documents, enabling ‘Red Book’ listing, and denotes compliance with the highest levels of fire testing within the UK. LPCB standards are often used as a benchmark Certification by leading building insurers involved in all forms of construction. Insurers requesting LPCB standards of conformity are generally looking to minimise their risk by insisting on compliance with the most rigorous fire performance standards backed by independent third-party Certification.

Dryvit’s fire testing programme and LPCB Certification was carried out at the world-renowned Building Research Establishment (BRE) based in Watford and covers the Outsulation, Outsulation Plus and Outsulation Rail Systems over a range of insulation thicknesses, finishes, textures & colours over both solid and framed substrates.  Until now, only a limited number of External Wall Insulated Render Systems have received Certification from the prestigious Loss Prevention Certification Board (LPCB). This comprehensive programme of large-scale fire testing, coupled with on-going manufacturing surveillance and annual audit testing, will offer versatility of specification with ultimate assurance of compliance at all levels.  

The Outsulation, Outsulation Plus & Outsulation Rail Systems all provide proven weatherability and insulating qualities with the Outsulation Plus and Outsulation Rail System also adding a second line of defence against air, moisture and weather.  All systems can be fixed either mechanically or with adhesive to most substrates and are rendered with a polymer-modified reinforced base coat with a glass fibre mesh and can be finished with a wide choice of Dryvit’s standard and specialty coloured and textured finishes. For the test programme, stone wool firebreaks are positioned at each storey height, as recommended in the BRE report BR 135 Fire Performance of External Thermal Insulation for Walls of Multi-Storey Buildings. For information on the systems please refer to system options

BS 8414 test rigs during installation & ready for testing
Building Research Establishment Burn Hall
BS 8114 parts 1 & 2 and BR135 guidance docs related to fire performance of EWI for multi-storey buildings
North East Fire & Rescue Authority Fire Stations - Dryvit Outsulation
Dryvit systems PASS with BR135 Classification plus LPCB LPS 1581 & 1582 certification
Earlsdon Retirement Village - over 18m installation - Dryvit Outsulation Rail
+Who Are LPCB?

The Loss Prevention Certification Board (LPCB) has been working with industry and government for more than 100 years to set the standards needed to ensure that fire and security products and services perform effectively. LPCB offers third-party Certification confirming that products and services have met and will continue to meet these standards. This benefits both specifiers and manufacturers:

Specifiers selecting LPCB Certified products reduce fire and security risks. The use of approved products is encouraged by insurers. They also avoid wasting money on purchasing inappropriate equipment, and save time spent on searching for and assessing products and services.

Manufacturers LPCB Certified products are specified worldwide and recognised for their ability to conform every time.  In addition, third-party approval demonstrates due diligence and reduces liability for the manufacturer, their insurers and customers.

Red Book listings
All LPCB approved fire safety and security products are listed on the Red Book Live website. The listings are constantly updated with all the latest LPCB approval information and is used across the world. The Red Book listings are the de-facto directory of approved and trusted fire and security products and services.

Current Dryvit UK Ltd Certificates can be found via the links below:-

LPCB Certificate
No: 1432a

LPCB Certificate
No: 1432b

+Dryvit Fire Certification Summary Table
System Substrate BR 135 Classification report*
Red Book listing/Certificate No.
Outsulation & Outsulation Plus Solid & LSF  233022-3,
233022-4, 237049-3,
241812-2 & 299878
Outsulation Rail Solid & LSF 240418-3, 240418-4 &
Fedderlite Solid 250343-2  N/A
Fedderlite LSF  252650-2 N/A


*Conformance requirements to LPS 1581/1582 exceed those of BR 135 classification and provide a more comprehensive and controlled level of Certification that can allow greater insulation thickness to that detailed in BR 135 classification reports. Refer to Dryvit UK for further information.
+How Can Dryvit Help?

As a direct result of the comprehensive fire Certification, Dryvit UK Ltd has been successful in assisting clients, specifiers, main contractors and installers to value engineer projects by being able to offer the most cost-effective External Wall Insulation (EWI) System. We are generally able to satisfy the strictest requirements of Building Regulation or insurer-based fire criteria and can often replace more expensive insulation systems, metal rainscreen, or even stone cladding options resulting in significant savings in cost and in many cases reduce installation time.  

Dryvit have gained extensive understanding in regulatory and insurer requirements from our full-scale fire test programme and subsequent involvement in projects and we would value the opportunity to assist you in specifying the most effective solution to meet your technical and aesthetic aspirations. Please contact us for further advice.

Broughton High School
Full Marks for Dryvit Outsulation
As the Dryvit Outsulation external wall insulation (EWI) held the relevant comprehensive Loss Prevention Certification Board (LPCB) fire approvals, it helped secure 13 High schools throughout Edinburgh and Perthshire, Broughton High School being one of them.
Dryvit Outsulation Comes to the rescue
This new concept of hospital care has a clear outset goal - saving more lives and improving clinical outcomes for patients. Dryvit's market leading external wall insulation (EWI) fire approvals were instrumental in satisfying insurer requirements for the project.
Tescos Orpington
Dryvit checks out for Tesco’s mixed development
Dryvit's comprehensive LPCB and BR135 fire accreditation was key to the specification of the Outsulation Rail and Outsulation External Wall Insulation (EWI) systems on the scheme,as the residential parts of the build were over 18 metres.

View project gallery