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EXTERNAL ENVELOPE
Careful design and testing of dry fi x systems means that their mechanical resistance to wind loads is proven. Therefore, systems can be designed to withstand the highest wind loads a roof is ever likely to encounter, based on BS 5534, once in 50-year probability calculations. Dry verge systems are a neat solution for roof verges, eliminating the need for mortar bedding. The verge units are weatherproof and provide a secure fi xing for each verge tile, meaning that they can be regarded as one of the two required tile fi xings at the verge. Ridge end caps are available, which allow the dry verge system to seamlessly integrate with the dry ridge.
If there is any resistance to the use of
dry fi x systems, it is generally based on perceived cost. Though the initial cost of dry fi x components may be higher than traditional mortar, the reduced installation time and long-term savings in maintenance and repairs more than outweigh the upfront investment. Call backs alone can cost roofers thousands in lost profi ts and were common practice in housebuilding, where the settlement of a new building quickly damaged the solid, infl exible mortar joints at ridges, hips and verge details. Because no mortar is needed, installation can proceed in damp or cold conditions that would make traditional methods impractical. This increases effi ciency and reduces project timelines. Dry fi x pitched roofi ng continues to
As regulations and technology advance, the adoption of dry fi x methods has become the new standard in pitched roofi ng
provide high-level roof space ventilation in accordance with BS 5250 where required. A great advantage of dry fi x systems is that they are designed to be maintenance free. No matter how well a contractor installs a mortar bedded verge, ridge or hip, eventually the elements and natural building settlement will damage the mortar, making it ineffective. In contrast, dry fi x systems can cope with settlement by allowing a degree of movement in the surrounding materials. Dry fi x systems provide a neat, consistent fi nish, often with concealed fi xings, which maintains the visual appeal of the roofl ine over time.
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evolve, with manufacturers innovating to improve aesthetics, ease of installation, and environmental sustainability. Recycled materials and improved ventilation technology are increasingly common features. As climate change brings more extreme weather events, reliable and resilient roofi ng systems will become ever more essential. In summary, dry fi x pitched roofi ng systems offer a modern, durable, and regulation-compliant solution for roof verges, ridges, hips, valleys, and abutments. Their ease of installation, minimal maintenance, and strong weather resistance make them a smart investment for both new and existing buildings. As regulations and technology advance, the adoption of dry fi x methods has become the new standard in pitched roofi ng across the construction industry.
Gareth Wright is sales director at Manthorpe
ADF OCTOBER 2025
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