CASE STUDY: Snowfields Primary School – London SE1

Resurface and overlay project on flat roof on Victorian school building whole area 100m2 – 50% hardwood timber decking, 50% bonded artificial grass. Main contractor / client Kier, subcontractor PM Associates – May 2015 The area was a flat roof on top of a 5 storey school in South London. The client needed to re-waterproof the deck and install a hard landscaping surface on top. The project was constrained in a number of ways, including the fact that access to the roof was only available via a narrow stairway up the 5 storeys and, being a working school, the only timescale available to carry out the work was within a one-week half term window in May 15. The subcontractor overlaid the deck with a synthetic fully bonded waterproofing membrane. A timber decking and artificial grass finish was desired by the client. The contours of the deck surface could not be compromised and the area needed to be free draining. However, the warranty from the manufacturer of the membrane would have bee
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