Market Leading Fire Certification

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

Dryvit has carried out an extensive programme of fire testing to become one of the first external insulated render manufacturers to achieve BR135 classification tested in accordance with BS 8414-1 and BS 8414-2 for its range of external wall insulation systems. This testing satisfies building regulations in England & Wales and Scotland pertaining to fire for buildings over 18 metres tall. The BR 135 classification is called for as an alternative guidance to non-combustibility compliance for domestic and commercial applications.

In addition to the BR 135 classification the range of systems have also been assessed under the surveillance of the Loss Prevention Certification Board (LPCB) to the more stringent requirements of LPS 1581 & LPS 1582, enabling ‘Red Book’ listing, and denotes compliance with the highest levels of fire testing conformity within the UK. LPCB standards are often used as a benchmark approval 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 was carried out at the world renowned Building Research Establishment (BRE) in Watford and covers the Roxsulation, Outsulation, Outsulation Plus and Outsulation Rail range of systems covering a range of insulation thicknesses and finish textures & colours over both solid and framed substrates.  Until now, only a limited number of external insulated render systems have received certification from the prestigious Loss Prevention Certification Board (LPCB). This comprehensive programme of fire testing under typical end–use conditions, coupled with on-going manufacturing surveillance audits, will offer versatility of specification with ultimate assurance of compliance at all levels.  

Roxsulation and Outsulation differ only in the type of insulation incorporated within the systems – Roxsulation is based on mineral wool and Outsulation on expanded polystyrene (EPS). Outsulation Plus & Outsulation Rail builds upon the proven weatherability and insulating qualities of Outsulation by 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 then rendered with a polymer-modified mortar reinforced with a glass fibre mesh and finished with one of a range of coloured textured acrylic finishes. For the test programme, mineral wool firebreaks at storey height intervals were used in the Outsulation, Outsulation Plus & Outsulation Rail installations, as recommended in the BRE report BR135 “Fire performance of external thermal insulation for walls of multi-storey buildings”. For information on system options please refer to system options

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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 approval confirming that products and services have met and will continue to meet these standards. This benefits both specifiers and manufacturers:

Specifiers selecting LPCB approved products reduce fire safety and security risks and demonstrate due diligence (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 approved products are specified world wide and recognised for their ability to conform every time.  In addition, third-party approval demonstrates due diligence and reduces liability for manufacturer - and their insurers and customers.

Red Book listings
All LPCB approved fire safety and security products are listed on the RedBookLive 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 systems LPCB, LPS 1581 & LPS 1582 certification can be found via the links below:-

LPCB Certificate
No: 784a

LPCB Certificate
No: 784b

+Dryvit Fire Certification Summary Table
System Substrate Insulation Type & Thickness BR135 Classification* Red Book listing
Roxsulation S Solid  Mineral Wool
40 – 200mm
230903-3 &
Outsulation & Outsulation Plus Solid  EPS
 50 – 250mm
233022-4 &
Outsulation & Outsulation Plus LSF  EPS
 50 – 250mm
23709-3  784b/01
Outsulation Rail LSF EPS
 50 – 250mm 
240418-3 &
Fedderlite Solid EPS
50 & 120mm 
Fedderlite LSF  EPS
50 & 120mm


*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?

Dryvit has been successful in assisting clients, specifiers, main contractors and installers to cost engineer projects by being able to offer more cost effective external wall insulation system (EWI) alternatives, such as our EPS  as a direct result of the comprehensive fire certification we have for our range. We are generally able to satisfy the strictest requirements of building regulation or insurer based fire criteria and can often replace more expensive EWI systems incorporating non-combustible insulation, metal rainscreen, or even stone cladding options resulting in significant savings in cost and in many cases installation programme time.   

Typical buildings types where Dryvit’s LPCB certification can influence the cladding specification are high rise buildings over 18m or education or healthcare buildings where regulatory and insurer requirements call for the highest standard of fire accreditation.

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 cost 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.

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