The Middlemore Properties Team chose to embark on a 100% re-roof, specifying Viking’s Epiclad membrane once again, for two reasons: (i) it had kept Kidz First’s staff and more importantly, its precious young patients, dry since its installation 16 years earlier and (ii) various other membrane types on neighbouring Middlemore buildings had not demonstrated the same degree of weathertightness and longevity.
After several consultations with Viking Roofspec Technical staff, the successful applicator installed exactly to Viking’s robust specification for this roof, being: fully-adhered 6m-wide x 15.2m-long rolls of 1.5mm thick Epiclad Membrane, to minimise the number of joins. For added assurance, 150mm-wide lap tape was imported exclusively for this job (the market norm being just 50mm wide) thus providing 200% greater protection at the seams.
36 substrate vents were also installed, (one for every 50m2) to extract any moisture that may possibly have been in the concrete substrate.
To counter the potential issue of damage to the new roof, a network of robust TPO walkway mats with a grippy tread plate pattern were installed on top, to channel tradesmen and their tools / machinery in the same direction and therefore keep them off the membrane.
The previous roof had also exhibited excessive ponding in a couple of corners due to negative gradient, so the Viking Approved Applicator installed some tapered polyiso insulation under the Epiclad membrane; therefore promoting watershed back towards the nearest drains.