East Midlands Airport
The existing roof had a felt waterproofing system covered with chippings, which were adding excess weight to the roof and blocking the outlet pipes as well as causing leaks internally. As expected with an airport roof, there was also a huge amount of plant and roof lights, which put additional stress on the waterproofing.
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NEC
The N.E.C. implemented the long term preventative maintenance programme prior to the development of any serious problems, as any failure of the existing felt would clearly present an unacceptable threat to routines and commercial events within the halls.
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