Factory pre-punched panels and structural members assure proper fit and alignment
Slotted holes allow the roof panels to move with thermal expansion and contraction
   forces without tearing holes in the panels at fastener locations but sealed agaisnt leak
Its "return leg" provides extra support at the panel side laps
Strong fasteners offer twice the pullout strength of common self-drilling screws
A special sealant groove is provided to assure BUTLER^® sealant is applied at the
   proper location
The butyl sealant remains pliable to help keep your roof weathertight
A deep 38mm corrugation makes the BUTLERIB^® II roof panel one of the strongest
   standard ribbed panels in the industry
The roof system is available with a U.L. Class 90 wind uplift rating or FM Class 1–90
    rating