Cut edge corrosion occurs when coated metal cladding is exposed to the elements. Most manufacturers offer 15 – 25 year guarantees on their cladding although when the sheets are cut during constructions this leaves a thin uncoated area exposed to the elements and open to peeling and corrosion.

Typically commercial gutters are manufactured in relatively short lengths of steel or Asbestos bolted together to form a continuous gutter. These typically leak at the joins due to deterioration of the gutter fabric and building movement caused by thermal expansion and contraction.

Overclad systems are commonly used on older industrial buildings where the existing roof covering is difficult or costly to remove such as asbestos sheeting. Over-cladding offers the ability to insulate and waterproof directly over an existing roof covering.