Air-Z is a structured mat for Rheinzink standing-seam roof systems, copings, and inlay gutters. It is made of nylon filament installed over underlayment with substrates of plywood or oriented strand board. Air-Z was engineered for sloped roof applications and compensates for structural tolerances up to 2mm. Rheinzink, (781) 729-0812; www.rheinzink.com