A new roofing product approval has been given to Union Corrugating regarding its Advantage Lok II 26 gauge concealed fastener standing seam panel used for residential and commercial roofs.
This Florida Building Code Approval, FL21677.1, provides improvements over previous product approvals. The approval offers increased fastener spacing, up to 13-7/8 inches on center, along with other improvements. High wind conditions and corner zone requirements are also enhanced:
- Expanded fastener spacing options (other than 6 inches on center)
- Use of the slotted fastening flange (provides improved expansion/contraction)
- Includes optional use over asphalt shingles
- Improvements on load results
- Covers application over most all solid substrate types (7/16 inch OSB being the minimum)
- More accessible sealant options for the sidelap/retainer adhesive types