ROCKWOOL is delighted to announce that its RAINSCREEN DUO SLAB® has become the first stone wool product to receive approval by the British Board of Agrément (BBA) for use in Ventilated rainscreen systems.

BBA certification is recognised throughout the construction industry and is a sought after accreditation for manufacturers. It is also incredibly important to specifiers, as it is a mark of quality, safety and reliability that provides reassurance of the product.

In order to achieve the BBA Agrément Certificate, products have to pass a series of comprehensive assessments, including laboratory tests, on-site evaluations, quality management checks and inspections of production. The RAINSCREEN DUO SLAB® was tested for factors such as thermal performance, condensation risk, behaviour in relation to fire, and durability in order to meet UK British Regulations. The ROCKWOOL product successfully met all these requirements and achieved certification status for use as a Hybrid frame system and Rainscreen system.

As the only stone wool product certified by the BBA for use in Ventilated rainscreen systems, this approval helps support and endorse ROCKWOOL’s key product messages:

  • Peace of mind and quality of life
  • Innovative products for modern life
  • Lasting, durable and resilient
  • Energy efficiency
  • Fire resilience
  • Health safety and wellbeing
  • Natural solutions and sustainability

“It is incredibly important to us to put our products through the BBA process, as the certification provides architects with peace of mind when specifying our products” comments Paul Barrett, Product Manager at ROCKWOOL. “It also reinforces the premise that we produce sustainable products that are innovative, durable and long lasting.”

Manufactured from volcanic rock, RAINSCREEN DUO SLAB® is a dual density insulation board that comprises of a robust outer surface and a resilient inner face. By compressing the primary fleece onto the top 15mm of the insulation, the product can be used, unprotected, in severe external weather, including strong wind and rain as experienced at high altitudes. As with all ROCKWOOL products, it’s fire resilient and complies with Approved Document B, achieving the highest Euroclass classification: A1. RAINSCREEN DUO SLAB® also complies with BR135: “Fire Performance of External Insulation for Walls of Multi-Storey Buildings”.

For more information about RAINSCREEN DUO SLAB®, please visit

Derbigum, the UK’s highest-performance bituminous roofing membrane with a 40-year BBA durability statement, now also includes zero falls.

Alumasc’s Derbigum waterproofing membrane is the only high-performance bituminous roofing membrane with a 40-year durability statement that also includes zero falls from the BBA (British Board of Agrément).

Whilst other competitors’ may have durability statements that are typically for 20 or 25 years, Alumasc’s Derbigum stands out for its proven reliability with a 40-year BBA durability statement – giving specifiers and end-users added confidence as to the product’s in-service longevity. This BBA now also includes for use as fully-bonded or partially bonded waterproofing on flat, pitched or zero-pitched roofs with limited access, and is the only bituminous membrane on the market with proven 40-year durability and approval for zero falls installations.

With a proven track record of success, Alumasc’s Derbigum systems have held a BBA certificate since 1980 and offer a variety of environmentally-beneficial, sustainable characteristics including: membranes with high levels of recycled content; innovative CO2 neutralising membranes; energy efficient ‘cool’ roofs; and vegetal, non-bituminous solutions.

Click here to download your copy of the BBA certificate or call +44 (0) 3335 771 500.

The high performance weber.rend MT multi-coat render system from Saint-Gobain Weber, the leading UK formulator and manufacturer of innovative materials, systems and solutions for the construction industry, has recently gained full BBA Certification. This accreditation meets NHBC requirements for new build housing where house builders are constantly seeking modern methods of construction for speed and cost efficiency. The weber.rend MT system is designed to rapidly finish buildings with a frame and panel construction.

weber.rend MT is a high performance, light-weight, render system which incorporates glass-fibre meshcloth reinforcement and a resin-rich adhesive coat that can carry a choice of textured finishes in a wide range of colours. This modern render system is designed for large areas of stable render carrier boards without the need for expressed joints to create smooth, modern design aesthetics. Equally weber.rend MT is ideal for uneven masonry or mixed substrates where crack resistance is essential.  Application can be by machine spray or by hand with a float and dry-sponge to achieve a render smooth finish.  It is ideal for a variety of synthetic textured and coloured finish coats to produce weatherproof, vapour permeable protection.

“Achieving BBA Certification for the well-proven weber.rend MT system underlines this product’s suitability for modern methods of frame and panel construction which is essential to speed the build process,” says Tracey Dempster, marketing manager, Saint-Gobain Weber. “The BBA testing has been carried out using three market leading render boards, Knauf Aquapanel, Siniat Bluclad and Euroform Rendaboard but equally the system is ideal for mixed substrates or repaired, uneven surfaces.  It is a very versatile render system.”

The British Board of Agrément is the UK’s leading authority providing accreditation and inspection services to manufacturers and installers that supply the construction industry. The BBA’s custom-built testing centre carried out extensive product tests on weber.rend MT including accelerated ageing analysis, weather resistance, impact strength, fire related performance and longevity to ensure the system performs satisfactorily for a period in excess of 30 years.  Holding BBA accreditation assures house builders, housing associations, building regulation authorities and contractors of the product quality and suitability for new build and regeneration projects.

The weber.rend MT system has been used by Barratt Homes to achieve the ‘Sustainable Housebuilder of the Year’ in the Housebuilder Awards for the Hanham Hall project of 185 bespoke, energy efficient homes.  The timber frame and SIP panel construction method determined the selection of a clean, simple aesthetic finish for the properties and the light-weight of the weber.rend MT system was of benefit here.

A BREEAM outstanding rating and the BREEAM Education Award has been achieved by a £39m school and community campus project in Bridgend, South Wales in the Gateway to the Valleys scheme where the weber.rend MT system has contributed significantly to the high levels of sustainability and low energy demands of the building.

For more information about this project, or for technical support, please contact Saint-Gobain Weber on 08703 330 070, or visit Customers in Ireland should call 028 9335 2999 or visit

A free download of the new for iPhone and iPad users is also available from iTunes and from Google Play for Android smartphones and tablet users.  Follow Saint-Gobain Weber on Twitter @SGWeberUK for the latest company news and updates.

The importance of BBA (British Board of Agrément) certification is well-known as an independent mark of approval for suppliers to the construction industry, and Cembrit has the distinction of having its complete range of fibre cement fully accredited by the organisation.

The BBA is the UK’s major authority offering approval and certification services to manufacturers and installers supplying the construction industry. BBA certification is a sought after accreditation, and one which is incredibly important to architects. Cembrit holds five BBA Certificates for its fibre cement slate range, ensuring that whichever system is chosen, architects can be confident in the specified product. To achieve this status, Cembrit fibre cement slates completed a comprehensive testing process and successfully met all the requirements set out by the BBA.

“BBA certification enables architects to specify Cembrit fibre cement slates with confidence,” says Ged Ferris, Marketing Manager of Cembrit. “Our fibre cement slates range provides a high quality roofing finish that is both attractive and long lasting. Architects specify the slates for use on both residential and commercial properties, and have in the past, praised the product for delivering the desired results.”

The Cembrit range of fibre cement slates includes Westerland, Moorland, Zeeland, Jutland and Diamond, all offering their own unique appearance. The slates are ideal for use on conventional pitched timber roofs with a rafter pitch of 20° and over, or hung vertically as cladding on external walls. The slates are complemented by matching fibre cement ridges, ventilation solutions and fixings.

Manufactured to the highest European standards using Portland cement together with a formulation of superior blended synthetic and cellulose fibres, Cembrit fibre cement slates are finished with a high quality, semi-matt acrylic coloured coating to the face and edges and a tinted, high performance binder to the back face. Cembrit fibre cement slates are the most accredited on the UK market.

For further information visit, or email

Stirling Lloyd is proud to announce that its Eliminator Bridge Deck Waterproofing system has gained European Technical Assessment (ETA) certification from the European Organisation for Technical Approvals (EOTA) through the British Board of Agrément (BBA). The ETA is based on the testing requirements as set out in European Technical Approval Guideline (ETAG) 033. Eliminator is the first UK manufactured system to achieve this level of accreditation.

The ETA certificate confirms that Eliminator has been tested and meets the very latest, high-level European requirements that are specific to the waterproofing of bridge decks. Unlike most other systems, which use more generic standards to CE mark their materials, Eliminator is CE marked to a specific standard.

Clients, specifiers and contractors in EU Members States can be confident when selecting Eliminator that it fully complies with the EU’s design, installation and performance requirements. The certificate provides assurances that the product will perform to consistently high standards, helping to bring greater quality to the construction industry.

As well as confirming the effectiveness of Stirling Lloyd’s advanced polymer technology, Eliminator’s ETA certification provides the latest Factory Production Control (FCP++), which includes audits of production processes, QA/QC testing and full traceability of raw materials through to the finished product.

Eliminator has an unparalleled 30-year global track record. The product has already provided protection of over 15,000,000m2 of bridge deck, on more than 20,000 structures in over 60 countries, in extreme climates, on both road and rail, under heavy traffic on steel and concrete.

John Volpicelli, export director at Stirling Lloyd comments: “It’s fantastic news that Stirling Lloyd has received this ETA accreditation. We operate in many countries both in and outside Europe, and this high level of testing and auditing means all our clients can be assured that Eliminator meets the EOTA standards in manufacture, specification and performance. Stirling Lloyd is proud to be constantly improving standards in engineering.”

Dr Frank Swallow, technical director at Stirling Lloyd oversees all research and development and was heavily involved in the assessment. Frank commented: “During the assessment, BBA technical officers oversaw a large number of comprehensive tests on Eliminator, testing key features and validating the test reports.

“We were confident that our product would come through the assessment with flying colours, as all our products are put through rigorous in-house testing, to ensure they always exceed industry standards. The attainment of the internationally recognised ETA certification through the BBA demonstrates Stirling Lloyd’s commitment to high quality product innovation.”

For more information please visit