• Depending on the required holding strength, contractors can install clips, brackets, or clamps to the side of the rib or seam using setscrews or self-tapping screws, or install them into the structural element of the roof using lag screws with roof penetration. Attaching to the side of the rib or seam is easier to install and better for waterproofing. Waterproofing is very important. Water doesn’t stay on the top or side of the rib for long, but may stay on the flat or valley areas. 

• Most clips, brackets, and clamps are strong themselves and stronger than the metal roof. The weak area is the connection between these products and the metal roof panels. When securing to the metal roof, make sure to use appropriate screws and do not overtighten them.