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) drummer and bandleader steers an impressive quartet, composed of some of the newer generations of the AACM, and emphasizes blues, swing and groove." The All About Jazz review by Troy Collins says "Whether navigating funky R&B, modal post-bop or expressionistic abstraction, El'Zabar's young sidemen invest their efforts with palpable conviction, imparting even textbook extrapolations with heartfelt urgency." In his review for "JazzTimes" David Whiteis states "As Howard Mandel’s liner notes assure us, this music is 'neither avant-garde nor old guard.' It’s unselfconsciously both contemporary and roots-rich, and it resonates with the joy of invention." What It Is! (Kahil El'Zabar album)