Metal roof provides increased wind resistance when compared to other roofing materials. This is because metal roofing systems use interlocking panels. The disadvantages of metal roofs include the noise created from rain hitting the roof, and, in snowy areas, the tendency of snow to easily fall off the roof and onto pedestrians or property. Originally, metal roofs were made of corrugated galvanized steel: a wrought iron–steel sheet was coated with zinc and then roll-formed into corrugated sheets. Another approach is to blend zinc, aluminum, and silicon-coated steel. These products are sold under various trade names like "Zincalume" or "Galvalume". The surface may
What It Is! (Kahil El'Zabar album) What It Is! (Kahil El'Zabar album) What It Is! is an album by American jazz percussionist Kahil El'Zabar, which was recorded in 2012 and released on Delmark. It was the debut of a quartet comprising three young players from the school of Chicago's AACM: tenor saxophonist Kevin Nabors, pianist Justin Dillard and bassist Junius Paul. The album includes five originals and two jazz standards by John Coltrane: "Impressions" and "Central Park West". The "Down Beat" review by John Murph states "Kahil El’Zabar moves toward the center this time around and releases one of his most accessible discs yet. The adventurous