Roofing Feature A better future for all?
Keith Plummer of Ubbink discusses why the launch of BS 8612 was necessary and how it has impacted the industry and made dry verge systems a reliable roofing solution
Maintenance & Refurbishment
manufacturers to comply with the new standards and tests. The industry must carry the responsibility to ensure all manufacturers
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produce quality products – in return specifiers select quality products, merchants supply quality products, contractors fit quality products and house owners can be assured their roof complies and will function correctly. The time is well overdue where legislation and performance stand up and be counted! British Standard BS 5250: Control of Condensation in Building and BS 5534;
Slating and Tiling have been in place for years to ensure professional and consistent building conditions are adhered to. BS 5534 was last reviewed and updated four years ago after the industry and experts deemed mortar bedding for ridge and hip less trustworthy, with a shorter lifespan than newer technologies. In turn, BS 5534 was revised stating that all ridge and hip tiles had to be mechanically fixed even when mortar had been used to improve the fix. BS 5250 and BS 5534:2014 were very clear on how and where the products
needed to be installed to meet the requirements, however what wasn’t available was a British Standard to test the products and their durability. With more harsh and adverse weather conditions hitting the UK each year, some systems were failing which resulted in delays on sites and returns to builds to fix systems that
ritish Standards launched BS 8612: Dry-Fixed Ridge, Hip and Verge Systems to raise and control manufacturing quality levels last year, and its implementation has seen products be redeveloped and improved by
Dry verge systems have become increasingly popular as they allow not only additional securing points for the roof tiles, but replace the need for mortar
had become loose or totally disengaged due to the high winds and snow loads. Over the last few years in particular, dry verge systems have become
increasingly popular as they allow not only additional securing points for the roof tiles, but replace the need for mortar, meeting current regulations. But with the increase of products in the market it has become more and more difficult to specify a durable system, as often the products look alike with similar features, but have hidden compromises to reduce cost. Early examples of dry verge systems had inherited well-known and common
issues such as poor quality raw material being used, resulting in units warping (PVC is a non-runner and polypropylene without certain additives will not perform), and just not being resilient enough. Units were also being secured either to the end of an extended cut tile batten or directly to the barge board,
www.housingmmonline.co.uk | HMM October/November 2019 | 41
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