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RCI December 2017

PITCHED ROOFING Liscard Primary School needed extensive refurbishment of its roof. Taking the opportunity to specify a roof that would also neutralise harmful particles in the air, the school opted for Icopal’s Decra Noxite. Rowan Gutteridge of MAC Roofing, said: “Liscard Primary School’s existing roof had come to the end of its life and we realised we needed to strip and re-roof the premises entirely. Doing so during term time was particularly tricky, as we wanted to make sure the children’s education was not compromised by our work. Icopal’s Decra Noxite was a great product to work with in this respect because it is simple to install and allowed us to deliver the project on time.” Combining the durability and lightweight design of the popular Decra Classic tile with the depolluting 090 DECEMBER 2017 RCIMAG.COM technology of the Noxite membrane, Decra Noxite was chosen. Liscard Primary School now benefits from the aesthetics of Decra roof tiles, which have been developed to resemble traditional roof tiles, whilst at the same time making a positive difference to the surrounding environment. Nitrogen dioxide (NO²) and Nitric Oxide (NO) are together referred to as NOx. This is an air pollutant and a particular problem in urban areas, where NOx is created during fuel combustion in car engines. NOx can also react to form smog and acid rain, as well as groundlevel ozone, which are also pollutants. As a result, serious respiratory illnesses that reduce life expectancy can occur. Specifying the Decra Noxite tile for this project was a positive contribution to improving the air quality for both staff and students, as well as the surrounding community. MAC Roofing was appointed, after a thorough competitive tendering process, to carry out the roofing works, which also needed to take place during term time. Firstly, the original slate was removed, with new quilt insulation then applied over the ceiling. Next, felt and battens were fixed before the Decra Noxite tiles Zink Copper Stainless were installed. In order to ensure there was minimum disruption to staff and pupils, the roofing contractor worked closely with the school and the local authority throughout this process to deliver the project on schedule. This collaborative approach also meant the team was able to keep the roof watertight during winter months to allow school lessons to continue. As further demonstration of commitment to building strong relationships with its customers, MAC Roofing also visited the school to speak to its students. Tom Houghton, health and safety officer for MAC Roofing, delivered assemblies to pupils to highlight the importance of health and safety and raise awareness of potential hazards. www.icopal.co.uk Icopal’s first Decra Noxite installation for primary school As well as being the first installation of the new Decra Noxite worldwide, MAC Roofing’s work at Liscard Primary School also resulted in it receiving first place for the Decra category in Icopal’s recent IMA awards Lochwinnoch Primary School has provided a showcase for Cambrian Slate, showing how an early 1900s traditional building can still retain its original appearance using a modern slate substitute, along with traditional slate detailing. The roof of the 111-year-old school was originally slated using Scotch slate that was at the end of its lifespan, so rain penetration was said to be causing a major issue. The challenge was to retain the school’s original appearance, complete with complex details such as hips, valleys, skews, the interface between flat roofs and around skylights, without costing as much as slate. Renfrewshire Council and Redland developed the answer to the challenge: Cambrian Slate, which is manufactured using 60% recycled Welsh slate. James Grant, the project architect for Renfrewshire Council, said: “Cambrian was the ideal choice for this project, offering the performance and ease of use of a modern tile, while providing a roof that was sympathetic to the naturally-tiled appearance of the original building.” Redland carried out a full Redland SpecMaster roof specification together with James Grant, examining every aspect of the roof in detail. These included raking valley details, sprocketed eaves, changes of pitch on the roof slope, detailing of top edge and side abutments, flat to pitch lead, ventilation at eaves and ridge, and underlay details. The council’s concern about the finish of the Cambrian Slates meant that an especially high standard of workmanship was required. This was constantly monitored by an on-site clerk of works and Keepmoat’s own site management team, with Redland’s account manager dropping in regularly to offer guidance. As the roof was originally slated there were many traditional details where the modern tiles had to be adapted to traditional details and interface with lead skews and flat roofs. These details were originally finished with slates directly onto sarking, so DM Roofing had to adapt this for modern interlocking slates by the inclusion of counterbattens and tile battens, whilst keeping the traditional appearance. The change of pitch at the hip junction was difficult, so Redland produced a sprocket detail that overcame the issue. All work was carried out in compliance with BS 5534: 2014 Code of Practice for Slating and Tiling and BS 5250 Code of Practice for the Control of Condensation in Buildings, ensuring that high and low-level ventilation was provided along with two mechanical fixings for each tile. On top of the Council’s aesthetic concerns was the issue of working on a live school for five weeks of term time and the careful management that had to go with this. One of the main challenges was keeping a live school wind and weathertight in the face of Scottish weather. Work also had to be scheduled with the school administration to organise the works to various areas while focusing on leaving a highquality finish. Overall, the spokesperson for the Council was “absolutely delighted” with the finished roof which was completed on time, with the assistance of two apprentices on site. www.redland.co.uk Scottish school sets tough test for Redland Cambrian 01992 801927 www.almhm.co.uk


RCI December 2017
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