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BS 8612: a watershed for pitched roofing

Redland has welcomed the introduction of BS 8612: Dry-fixed Ridge, Hip and Verge Systems for Slating and Tiling. The standard is a product specification which frames performance requirements for dry-fix roofing components, establishing that they are both fit for purpose and are delivered with sufficient information to ensure correct installation.

Dr Kevin Ley, Technical Manager of Redland, says: “Since BS 5534: 2014 – which brought about a step change in the requirements for fixing of pitched roofs – we have seen an acceleration in the move to modern dry-fix.

Unfortunately, the increased demand and a lack of performance requirements allowed products of questionable fitness into the market. The resulting problems meant there was a significant risk that past mistakes concerning mortar fix failures would be repeated”.

The switch from traditional wet fix to dry fix was initially driven by changes to NHBC guidance. In 2011, NHBC analysed its claims and discovered that 60% were related to roofs and, of those, over half involved mortar.

Redland has produced a handy guide to the new standard which you can download from:



Meeting the standard

Ged Ferris, Marketing Manager at Cembrit outlines how the new BS 8612 standard will benefit roofing contractors.

Roofing contractors should welcome the changes that the new BS 8612 standard will bring to the market; it will help ensure inadequate quality products are designed out of roof specifications and set a minimum performance that can be used to compare competing systems. To prepare for the Standard, roofing contractors should review the dry fix systems they currently use and, where possible, use manufacturers who provide high quality roofing accessories that meet the latest standards and can demonstrate long-term performance and durability. Using a dry fix system to secure ridges, hips, and verges, is easier than the time-consuming method of using mortar bedded cappings.

Not only that, dry fix systems are generally lightweight and straightforward to work with, meaning an easier and quicker fitting process. Installation is not dependent on getting the correct mortar mix or having to wait for dry weather. Other benefits of using a dry fix system include reduced repair costs, and call backs. There are tried and tested systems, backed by leading manufacturers that can be relied upon. We at Cembrit have developed dry-fix ridges with low profile fixings that are both easy to fix and comply with BS 5520 code of practice for control of condensation.