There are few more dramatic locations than the historic Jamaica Inn on windswept Bodmin moor in Cornwall. Made famous by the eponymous Daphne Du Maurier novel and various screen adaptations, the former coaching stop has a rich history ranging from smuggling to alleged hauntings, and is now a popular hotel and museum. So successful is the venue, however, that it has outgrown the original 1750 stone structure and builders AD Williams have been commissioned to create a new 16-room extension at its eastern end.
Situated at a height of 280m above sea level, the Jamaica Inn is exposed to some of the most extreme weather conditions in the UK, as the wind-farming installations on Bodmin Moor attest. Naturally such a challenging location, combined with need to match the heritage architecture, meant this project demanded just the right expertise – in design, product choice and installation.
When Heritage Roofing South West was contracted to apply a matching slate roof to the extension, it was clear that only a reliable membrane offering unrestricted compliance with BS5534:2014 would suffice. Accordingly, 225 square metres of DuPont™ Tyvek® Supro were applied as a robust, high-performance underlay. David Boyd of Heritage Roofing says, “I’ve looked into the latest version of BS5534 and I knew that not all membranes comply when you consider what the standard actually requires. Having the wind uplift resistance figure easily available, something you rarely see, made the choice of Tyvek® Supro an easy one to make.”
Straightforward to handle Tyvek® Supro is also the most durable roofing underlay available. Recent tests show that, thanks to the material’s unique 170 micron functional layer, Tyvek® continues to perform for well after twenty years’ installation, whereas multi-layer products often lose the capacity to hold out water, and some fail after less than five years on the job.
The many advanced properties and benefits of Tyvek® mean that the membrane meets all the requirements of Building Regulations (Part L & C) but also BS5534:2014, in all zones, altitudes and conditions, thus making it the clear choice for wind, water and air management, for long term peace of mind. This reliable performance comes together with carefully researched and clear guidelines, extensive experience and renowned service, further enhanced by the development of a unique calculation tool for more easily specifying membranes that comply with BS5534.