Page 44

RCI Feb 2018

CLADDING & SHEETING Continued from page 42 that there are, in fact, dry fall systems available. This means there will be no overspray at all, thus eliminating this problem completely. When new, your building’s cladding sheets were protected by a coating system lasting around 15-25 years, if not longer. Therefore, 044 FEBRUARY 2018 RCIMAG.COM why not simply reinstate a new coating system and extend the life of your building at a lower cost, with little disruption, and ultimate peace of mind? The right application It is imperative that the most appropriate coating system is selected for the project, and that it is applied correctly. As specialist coating applicators, Cladding Coatings have decades of re-coating experience and are approved applicators for leading system suppliers. Mike Hallwood, Managing Director at Cladding Coatings, said: ‘We understand the numerous problems associated with replacing your building’s exterior, which is why we are dedicated to premium repair and refurbishment work. With minimal disruption at the forefront of our minds, our team work to only the highest health and safety standards, using specialist coating systems, to ensure your building looks like new again.’ Committed to working to a ‘right first time’ philosophy, Cladding Coatings’ dedicated, professional team strive for a quality finish every time. As such, your building looks like new again, with long-term protection benefits, and significant savings in cost, and time. Roofing contractors take pride in professional installations that can stand the test of time. Selecting the correct roofing underlay is critical – getting it wrong could be expensive in many ways. A crucial quality is said to be the ability to withstand ‘underlay ballooning’ where impact with the outer covering can dislodge the tiles or slates and cause injury, considerable damage or risk of water ingress. Identifying the best membrane for the job can be tricky, which makes a useful new wind uplift calculator tool an indispensable source of advice. Relying on the five BS5534 wind zones alone is insufficient. The BS5534 standard splits the UK into five zones, each with a different requirement of resistance to wind uplift. However, using this method alone risks allowing materials with insufficient strength to be used when they are not suitable as the zonal approach does not take into account a number of requirements of the standard. These include site altitude, ridge height, pitch, site topography, ceiling condition, proximity to a body of water, slope on site and rural or town location. The standard, when applied as written, does distinguish between the unrestricted membranes available (such as Tyvek Supro with a taped lap) and materials with a very restricted use across the UK. The test itself is based around traditional installation techniques and the use of an expensive-to-fit counter batten is not shown or described in the test method. If a counter batten is used on refurbishment work, it will alter all the facia and gable heights etc., creating even more work and expense. We are all familiar with the term “buyer beware” and this is certainly the case in this instance. Key phrases such as “BS5534 compliant”, “specifications available” or “all zones compliance” may offer a sense of security, but when used without the certified wind uplift figure, mean very little in terms of performance. DuPont Tyvek reportedly offers a new, ‘tried-and-tested’ wind uplift calculator tool (http://tyvek.construction.dupont.c om/wuc) that reportedly goes beyond BS5534 zonal criteria. It’s said to be quick, easy to use, and free. Just enter the relevant information by selecting drop downs in seven categories: • Country (England, Scotland or Wales) • Wind zone (from the five wind zones identified in BS5534) • Terrain • Building height • Ceiling type • Distance from water (sea, lakes, rivers, etc.) • Slope It will assess individual aspects and recommend the membrane best suited for the job and every project, whatever its location. Determining the correct roofing membrane that will be durable over the years is important to any roofer’s professional reputation, their peace of mind and the building owners’ financial risk. The Tyvek Knowledge Centre BS5534 Wind Uplift Calculator is also now BRE tested and calibrated as accurate and in full compliance with all the requirements of BS5534. http://tyvek.construction.dupont.c om/wuc. Calming the storm


RCI Feb 2018
To see the actual publication please follow the link above