Organic Coatings

Paint protects metal roof and wall cladding from environmental deterioration and improves its appearance. Paint can be either factory or field-applied, but this section covers only factory-applied systems. For information on field-applied coatings, see section 13.7.

Painted coatings on a steel substrate that are coated with a metallic coating and then continuously painted and oven cured are known as pre-painted or coil coated. Following pre-treatment, a corrosion inhibiting primer and top-coat are applied to the outside surface and a primer coat and/or a backer coat is applied to the reverse side. This process is continuous and provides for a quality of paint finish not equalled by any other process. (see drawing 2.2.7.)

Prepainted Zinc and Zinc/Aluminium coated steel and Aluminium