| http://www.w3.org/ns/prov#value | - DutiesRoofers typically do the following:Inspect problem roofs to determine the best way to repair themMeasure roof to calculate the quantities of materials neededReplace damaged or rotting joists or plywoodInstall vapor barriers or layers of insulationInstall shingles, asphalt, metal, or other materials to make the roof watertightAlign roofing materials with edges of the roofCut roofing materials
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