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 Work Is sometimes been criticized for leaning too hard on his blue-collar "bona fides". The critic Adam Kirsch, writing in "The Times Book Review" in 1999, noted, accurately enough, that “in his autobiographical essays he goes out of his way to tell us that he is essentially a peasant.” David Baker, writing about "What Work Is" (1991) in the "Kenyon Review", said Levine has “one of our most resonant voices of social conviction and witness, and he speaks with a powerful clarity…What Work Is may be one of the most important books of poetry of our time. Poem after poem confronts the