Kelmscott School

Appointed to complete a complex roofing refurbishment at Kelmscott School in the London Borough of Waltham Forest, London-based Thameside Roofing turned to the ease of installation, cost effectiveness and proven performance of Esha Waterproofing System from Radmat Building Products.

Refurbished in 2008 as part of an £11.2m Building Schools for the Future (BSF) programme, 2013 saw Kelmscott School requiring a reliable roofing system for the main school building and several language blocks. With over 900 pupils and the project starting prior to the 6 week summer holiday, it was vital that the 3,000m2 application caused minimal disruption and was also completed in time for the new term in September.

Achieving the complex refurbishment programme within the required  time period required the use of a variety of Esha Upgrade Waterproofing Systems including self-adhesive EshaFlex 370 SA Black mineral reinforced bitumen membrane, torch applied EshaFlex 370 Black mineral reinforced bitumen membrane and cold bonded EshaUniversal single layer POCB membrane – providing the perfect solution at Kelmscott School.

Working closely with Radmat, Thameside Roofing completed the 12 week contract in just 8 weeks. Close liaison with the school proved paramount to the project’s success and early completion, with a substantial amount of planning and site co-ordination to ensure classrooms were vacated whilst roofing works took place without impacting on the school curriculum timetable.

Careful planning was also required to install the roofing system safely and satisfactorily with minimum disruption to the school, its teachers and pupils. Due to the large presence of asbestos-lined ceiling boards, all areas directly affected by the works needed daily air monitoring tests to ensure no presence of asbestos fibres where found. Installation of the roofing system first required Thameside Roofing to treat the existing metal roof surfaces before mechanically fixing Radmat’s timber faced ProTherm PIR insulation board over the roof.

The factory laminated 9mm plywood finish of the ProTherm PIR OSB Comp proving a smooth robust finish to complement the thermal performance improvements provided by the insulation. To ensure the insulation board was protected by a durable long lasting roofing membrane Radmat specified EshaFlex 370 SA Black mineral, a self-adhesive SBS modified reinforced bitumen membrane for the main roof areas.  Internal gutters were lined with EshaUniversal, a robust 3.2mm thick POCB modified single layer membrane without chippings to aid water flow.

On completion of each phased segment of works, Thameside Roofing undertook the delicate operation of removing existing ceiling tiles from some 50 classrooms to allow the asbestos lining treatment to take place.  On completion, the tiles were re-installed. Combining superb materials, high standards of workmanship and a 20 year insurance backed guarantee, Radmat and Thameside Roofing collaborated to extend the roofs’ life expectancies with a high quality refurbishment application that far exceeded the client’s expectations.

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Guilsborough School

Forming part of a complete refurbishment of the roof at the Guilsborough School in Northampton, the ease of installation,cost effectiveness and proven performance of the Esha waterproofing system from Radmat Building Products has enabled the project to be successfully completed within an extremely tight strict 6 week time frame.

Chosen for its ease of installation, cost effectiveness and proven performance the Esha Overlay waterproofing system was chosen for the four different roof areas which make up the community learning and art design blocks. With the 3,000m2 application needing be completed in the limited timeframe over the school’s summer holiday, a fast and efficient solution was required. Radmat’s EshaFlex 370 Black Mineral – a torch applied black mineral reinforced bitumen membrane with a polyester and fiberglass composite cap sheet that’s ideal for refurbishment applications – offered the ideal solution.

Working closely with Radmat, specialist contractor Higham Flat Roofing completed the 6 week contract with close liaison with the school proving paramount to the project’s successful speedy delivery. Higham Flat Roofing installed the EshaFlex 370 Black mineral over the roofs existing mineral felt membrane. This has been prepared by the cutting out of blisters and damaged areas, making good and then priming with EshaPrimer in order to create a base seal and improve the adhesion of the waterproofing membrane.

As part of the refurbishment, Higham Flat Roofing also power washed the external walls, completed some concrete repairs, painted fascias and removed Asbestos cement flues.

Suitable for a wide range of roofing applications, including flat or sloped roof construction on new build or refurbishment, Esha is a unique environmentally friendly roofing membrane, made from recycled materials. Quick and easy to install, this shrink-free, fully adhered membrane is more flexible and stronger than conventional membranes and has greater stability and durability.

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