It is necessary for every rib of LYSAGHT TRIMDEK® to be screw fastened to the support.
We can confidently say that our fences may be used all over Australia, except for the tropical cyclone regions (defined in AS1170.2 - 1989 SAA Loading Code, Part 2: Wind Loads). Installation methods will vary slightly, depending on your wind region, terrain category and soil type.
For cyclonic regions see:
LYSAGHT® Fences - Cyclonic Design and Installation Guide
It is not recommended to unclip LYSAGHT KLIP-LOK® 406 once the cladding is installed. Unclipping can damage the clips, cladding or metallic coating on the cladding. It is difficult to assess how LYSAGHT KLIP-LOK® 406 will perform after such damage.