Why do I have to pre-drill fastener holes in roofing with corrugated panels
Pre-drilling the holes ensures that the panels have room to expand and contract properly with temperature changes. Skipping this step can lead to distorted, warped or cracked panels.
Is it OK to walk over corrugated roofing sheets, during or after installation
No. If it can't be avoided during installation, use step ladders, platforms or crawling boards to prevent walking directly over the corrugated panels
Is corrugated panels resistant to UV radiation
Yes, corrugated panels is resistant to UV.
When roofing with corrugated panels, where should I start to install
you can choose to install left to right, or right to left. It is recommended to always advance the dominant wind direction at the site.