Flashing (weatherproofing) bark was occasionally used as a flashing material. Most flashing materials today are metal, plastic, rubber, or impregnated paper. Metal flashing materials include lead, aluminium, copper, stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminum, terne-coated copper, galvalume (aluminum-zinc alloy coated sheet steel), and metals similar to stone-coated metal roofing. Metal flashing should be provided with expansion joints on long runs to prevent deformation of the metal sheets due to expansion and contraction, and should not stain or be stained by adjacent materials or react chemically with them.
What Time Is It? (song) What Time Is It? (song) "What Time Is It?" is the opening musical number and first single from the Disney Channel Original Movie "High School Musical 2". It is featured on the "High School Musical 2" soundtrack, and is the first song off the "High School Musical 2" soundtrack. The song had its world premiere on Radio Disney on May 25, 2007 as part of its Planet Premiere featurette. On June 8, Disney premiered the video as a sneak peek in multiple nations at close to the same time. The single was released on July 16, 2007 worldwide, and on