Appearance

Fasteners must not fade at more than twice the rate of fade as the roofing material.

Paint coatings should evenly match that of the cladding in terms of colour, and be reasonably intact after installation with approved screw setting methods. The degree of paint loss during installation will be subject to the fasteners’ visual exposure, but should not exceed 10% of the exposed surface in any circumstance.

Some visual corrosion is acceptable after 10 years exposure, to the degree that it doesn’t affect the integrity of the fastener or the cladding material and appears over less than 10% of the fastener’s surface.