Waterproofing a Prime City Centre Development

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Eleven York Street, a 10-storey mixed-use development in Manchester city centre features a waterproof roofing system installed by BriggsAmasco.

Combining prime office space, retail units and Grade A accommodation, the high-profile development which occupies an area of 26,000 square metres, was completed by Kier Construction on behalf of Aviva Investors to a design by AHR Architects.

BriggsAmasco was selected as the roofing contractor for the building’s 1,200 square metre main roof and two plant rooms totalling 300 square metres. With work beginning at the height of the coronavirus pandemic in April 2020, the company’s workforce was reduced to improve social distancing and enhance on-site safety. This presented a challenge, as the pressure was on to steer the works programme back on track. It was delayed by a year due to ongoing issues with a neighbouring building which required demolition to make way for Eleven York Street.

Teams working on the main building installed IKO Permascreed to the roof’s 1200m2 concrete surface. The mastic asphalt-based levelling screed provided a stable base for an IKO Pewmatec hot-applied membrane waterproofing system, also enabling installers to create falls and ensure appropriate water run-off.

Hot-applied waterproofing membrane and a ballast and paving finish were also used for the roofs of the two plant rooms which feature a plywood overlay to a metal deck, with the same combination additionally used on a fifth-floor terraced area requiring public access.

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Staff Reporter

FMIndustry.com covers the latest news, trends and opinion from the facilities management (FM) and corporate real estate (CRE) sectors. The FM market is currently estimated to be worth USD 1 trillion annually and is projected to grow at a compounded annualised rate of approximately 5% between now and 2026.

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