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RCI Feb 2018

Project1_Layout 1 07/05/PITCHED ROOFING The choice is yours In this article, Gareth Wright, sales director at Manthorpe Building Products, explores how leading dry verge manufacturers have responded to the market’s need for extensive choice, to ensure that there is a suitable product for every application and preference The UK roofing market continues to evolve, with current industry standards undergoing review and new regulations and guidance being introduced regularly. Part of the most recent review of the roofing standards looked at the common reasons for roof failures in the UK, with mortar identified as the single largest cause. As such, the upcoming modifications to the standards recognises that reliance on mortar alone to fix roofing elements in place is not always effective – especially in the long-term. To this end, forthcoming standards state that even if mortar is used, then the ridge and hip tiles must also be mechanically secured to the roof. There are several reasons why mortar might deteriorate over time, including wind stress and water seeping into the material and freezing. When the water freezes it expands and puts stress on the structure of the mortar. Repeated freezethaw cycles stress the mortar further and cause it to crack and fail. By eradicating the need to use mortar, dry verge roofing solutions eliminate this risk. They offer a low maintenance, cost effective alternative to traditional mortar bedding, with exceptional water and wind resistance - and it is these advantages that have driven a steady increase in demand within the roofing market. Dry fix systems can also be installed in all weather conditions, thanks to the mechanical fixing process. This helps avoid delays to the build – a real benefit, especially in the UK where we have on average 133 days of rain or snow annually. 090 FEBRUARY 2018 RCIMAG.COM However, it is essential to note that roofing failures can still happen with poor quality dry fix roofing products, hence the importance of choosing high quality, thoroughly tested systems from recognised manufacturers. For example, in response to the continued unpredictability and severity of climate conditions, Manthorpe Building Products has independently tested its complete SmartVerge range with the Building Research Establishment. Demonstrating the range’s superior performance, each product comfortably withstood wind speeds in excess of 100mph. Choice is another key contributor to a successful job, and there are now a wide range of colours, styles and materials available to suit a project. For example, some installers may prefer a PVCu dry verge roofing solution, whilst others may opt for polypropylene. A cost competitive dry verge product, polypropylene units are fitted in the same way as PVCu units, and can be provided in a range of colours to ensure seamless integration with popular shades of roofing tiles. In addition, installers can opt for an ambidextrous system. An alternative to using a right or left handed unit, ambidextrous systems can be used for both sides of the roof, and this can make the purchase process simpler. Properties with a slate tile roof require a different style of dry verge. Creating a distinctive and stylistic straight roofline, linear dry verge systems can be used with slate and non-profile or flat concrete tiles. This style of system is also suitable for sarking board details. With so many factors to consider, quality and choice is key. However, with manufacturers now providing an extensive offering, it’s never been easier to make the switch. www.manthorpebuildingproducts.co.uk


RCI Feb 2018
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