Mike Vaczi, Technical Director at SOPREMA, explains why he feels British Board of Agrément (BBA) certification is much more than simply a marketing badge, providing roofing contractors and installers with a valuable technical resource when working with PIR insulation.
Choosing the right insulation is a critical part of delivering a roofing project that performs as intended. For roofing contractors and installers, it is not simply a case of selecting a product with the required thermal performance. The suitability of the insulation of the roof build-up, its handling and installation requirements, and the conditions needed to achieve its intended performance all need to be considered before work begins on site.
With increasing emphasis on building safety, product compliance and the quality of construction, having access to reliable technical information is essential. The British Board of Agrément (BBA) provides independently assessed evidence of product performance and suitability, helping roofing contractors understand how materials should be used and the requirements that need to be met during the installation.
“BBA certificates are still sometimes viewed as little more than a product credential, rather than the practical technical resource they can be”
Yet BBA certificates are still sometimes viewed as little more than a product credential, rather than the practical technical resource they can be. For roofing contractors, this independent assessment can help inform product selection, support installation decisions and provide a clear reference for the conditions under which a material is suitable for use.
After all, obtaining BBA certification is a rigorous process that extends well beyond laboratory testing. Products are subjected to detailed technical assessment, while manufacturing processes and quality control procedures are also scrutinised to ensure consistency throughout production.
For PIR insulation, certification typically evaluates a range of performance characteristics including thermal conductivity, moisture resistance, water vapour permeability, dimensional stability and reaction to fire. The assessment also considers how the product performs in its intended applications and the conditions under which that performance can be achieved.
The resulting certificate provides considerably more than a summary of test results. It explains where the product can be used, identifies any limitations, references the standards and regulations considered during assessment and sets out installation guidance that forms part of the certified system.
This distinction is important on site. While product literature naturally focuses on performance benefits, independent certification provides the technical context needed to understand whether a product is suitable for a particular roofing application and the requirements that must be met to achieve the intended results.
Another important element to consider is the storage, handling and installation of the products once specified. This is crucial, as the real-world performance on site depends on the materials being managed in accordance with the conditions under which they were assessed. This is also reflected within the BBA certification, which includes installation guidance alongside technical performance information.
When installing PIR insulation, boards should be closely butted together to minimise gaps and reduce the risk of thermal bridging. Exposed insulation should be protected from adverse weather during construction, and damaged boards should not be used. Installers should also be aware that foil-faced boards can become slippery in wet conditions and should always follow appropriate health and safety procedures when cutting or handling insulation.
Storage plays an equally important role. PIR boards should be kept dry, stored flat and raised above ground level to prevent moisture uptake. Wherever practical they should be stored indoors, while externally stored materials should remain protected beneath suitable opaque waterproof coverings.
Only the quantity required for immediate installation should be removed from storage, reducing unnecessary exposure to weather conditions, and any boards that have deteriorated should not be incorporated into the building envelope. These straightforward precautions help contractors maintain the condition of the insulation before and during the installation, supporting the delivery of the roof system that performs as intended. Checking the relevant certification and following the associated guidance also helps ensure that site practices align with the conditions under which the product was assessed.
“BBA certification should therefore be regarded as an integral part of the specification toolkit rather than a marketing badge”
The increasing focus on building safety following the Grenfell Tower fire and the ensuing Hackitt Review has reinforced the importance of clear, accurate, and accessible technical information throughout the design and construction process. For roofing contractors, understanding the products being installed, their intended applications and any limitations is an important part of ensuring products are selected and installed in accordance with the relevant technical guidance and project requirements.
For PIR insulation, BBA certification should therefore be regarded as an integral part of the specification toolkit rather than a marketing badge. Used alongside project-specific design information, manufacturer technical support and wider regulatory guidance, it enables roofing contractors to make better informed decisions, maintain confidence in product selection and support the delivery of buildings that perform as intended throughout their service life.