Unpainted Cladding

The practice of leaving metallically coated roof cladding to weather before painting is no longer recommended. With the latest developments in primers, roofs can now be painted immediately after installation, and it should be done within one month.

For new AZ coated cladding, only acrylic galvanised iron primers should be used, as solvent-based primers may damage the coating. A solvent-borne corrosion resistant galvanised-iron primer should be used for optimum performance on weathered zinc coated cladding over twelve months old.

After the primer, two coats of acrylic roofing paint should be applied in the selected colour to provide a paint thickness of 50 µm (typically two brush applied coats achieve 50 µm ).

If the cladding is weathered but shows signs of white or red corrosion or damage back to the metal base, proceed with painting as described Weathered With White Corrosion and Red Corrosion.


Draft Clause: