![]() ![]() Flashing can be copper,Īluminium, lead or tar. The most common residential flat roof leak occurs where flat roofing meets siding. This raw edge is then finished with anĪluminium drip edge to fasten and cover roofing. This enables the roof to continue over the edge, overlapping wall or existing metal coping. It is as simple as adding about 100 mm of material to the roof perimeter. The adhesion between top roof and underlying roofs is vital to the top roofs survival (longevity), so avoiding leaks on a multi layered roof is vital. This seal will eventually fail allowing water directly in to building or worse, in between layers of flat roofing, sometimes not noticed until roof becomes beyond repair. Millimetre shy of the edge and neatly sealed to existing or new metal using tar (and (vent pipes, a/c units, fence posts and perimeter flashing)Ĭommercial and industrial flat roofs have perimeter penetration and the trickiest leak: a/c units. ![]() Poor roof maintenance and roof at penetrations installed after Most flat roofs, however leak within 5-10 years of installation, due to Most flat roof materials last usually 30 to 40 years with some commercial grade applications lasting up to Flat Roof Leak Repair Services in AucklandĮxperts.
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