72 RCI 0514

RCI May 2014

FLAT ROOFING & FLEX SYSTEMS Alumasc raises the roof at Preston School Wide choice for flat roof membranes 072 MAY 2014 RCIMAG.COM Zink Copper Stainless 01992 801927 www.almhm.co.uk The refurbished Preston School in Yeovil uses a combination of Euroroof Mono membranes, which offer a single layer, flame-free waterproofing solution; Euroroof Mastergold, giving a 4mm thick APP-modified waterproofing membrane with a mineral finish; and Alumasc’s Euroroof Caltech, a flame-free, single component, self-levelling polyurethane liquid waterproofing solution cold-applied to the project’s guttering The heavy plant detailing at Bury College’s plant rooms has resulted in the specification of a Sika Liquid Plastics Decothane roofing system. Roofing contractors, Surface Protection, were briefed to refurbish the existing roof. Originally asphalt, it had later been felted, with additional plant added in various stages, rendering the felt ineffective. The roof had also been covered with a single ply membrane that had been unable to cope with the amount of detail required in sealing against all of the trunking and supports. There was also a row of low-level windowsills that had never been fully sealed. Poor drainage had caused the roof to hold inches of water after each rainfall, causing the team at Surface Protection to spend hours vacuuming water in-between coats after rain. The team also had to overcome a number of logistical issues, such as every support needing to be jacked up individually to allow the membrane to be dressed underneath. This was achieved by pre-treating the Sika carrier layer with Decothane, allowing it to dry, and then sliding it under supports so that each support could be lowered immediately. The pre-treated piece was then merged into the main rain covering. Surface Protection’s Jim Kennedy said: “We needed to provide a modern waterproofing solution that was able to cope with the intricacies of the heavy plant detailing. This led to the specification of the Sika Liquid Plastics system, its elasticity and flexibility suiting the requirements perfectly.” www.liquidplastics.co.uk Intricate detailing SIEVERT has re-launched the TW 5000, an electronic hot air automatic overlap welding machine, which the company says is capable of climbing a 30° slope roof without causing wrinkles or folds by using a fourwheel drive system. The machine also has separate free rolling wheels for easy transportation. The TW 5000 can weld any membrane, from plastic and rubber to modified bitumen, a fact that SIEVERT says makes the TW 5000 the professional’s choice for all membrane welding roofing applications. The machine is also available for hire as well as sale, making it a cost-effective solution. The SIEVERT TW 5000 is equipped with a high power fan and powerful heating element that ensures rapid warm up, whilst the temperature and welding speed are electronically controlled to ensure that a perfect weld, at speeds of up to 7 metres per minute, is always achieved. An LED display provides feedback to the user. Melvyn Baumber from Sievert UK said: “The SIEVERT TW 5000 machine is the ultimate hot air automatic overlap welding machine, which is available for hire as well as purchase for added user flexibility. Professionals choosing to hire the TW 5000 do so knowing it will do the job, fast and efficiently, for all membrane roofing applications and is supplied fully maintained for immediate operation.” TW 5000 features easily adjustable welding parameters, adjustable handle and front wheels, and a specially designed stainless steel nozzle and heat protection system. It is also equipped with an automatic start / stop sensor when the hot air tool is engaged / disengaged in the drive position. www.sievert.se Alumasc has provided a complete package of flat roofing solutions alongside its technical knowledge to the successful refurbishment of Preston School in Yeovil. Having gained Business and Enterprise Academy status in 2011, The Academy, in Somerset, was in need of considerable renovation including major repairs to the complex roof area, to cater for its student population of around 1,000 pupils aged between 11 to 16 years. Alumasc’s Technical Team was involved from the outset and provided an initial roof condition survey before suggesting a schedule of works. This service enabled the academy to apply for financial support from the Academies Capital Maintenance Fund (ACMF) and agree a three-phase approach to the project. Almost 4000m2 of Euroroof high performance bituminous membranes was specified by Academy business manager Gary French. Euroroof Mono was applied to the main roof area with Euroroof Mastergold used for detailing, along with Alumasc’s Caltech cold-applied liquid roofing system. The specification for the main roof area focused on flat roof membranes that can be installed by flame-free methods, which is always important for Academies, Schools, Hospitals and other Public Buildings. The nature of the buildings required different roofing systems to provide adequate protection in specific areas. To avoid the final installation appearing patchy, Alumasc recommended the use of matching loose grit across the entire roof, which has resulted in a uniform aesthetic appearance. Alumasc’s registered installer Stormforce Roofing completed phases one and two of the project over the school holidays in 2012 and 2013 to avoid any disruption to staff and pupils. Adam Bewers from Stormforce Roofing, said: “The good teamwork at Preston School turned what could have been a complex project into a very straightforward installation. “We have a good working relationship with Alumasc and we intend for that to continue. Our Alumasc-trained installers always complete their work to a high standard and using high quality materials makes our lives a lot easier.” Phase three is scheduled to be carried out during 2014’s school holiday period. Academy business manager, Gary French, said: “The service and advice that Alumasc provided free of charge greatly assisted in the Academies’ funding application. Their involvement thereafter from initial survey to specification and installation management, via the Alumasc registered contractor network, has resulted in a first class re-roofing scheme. I would have no hesitation in specifying Alumasc roofing systems for future projects.” www.alumascroofing.co.uk SIEVERT’sTW 5000 electronic hot air overlap welding machine Before (above): The existing roof was failing to cope with the level of detailing. During (below): The roof and its plant detailing successfully waterproofed with a Sika Liquid Plastics Decothane system


RCI May 2014
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