Example: bachelor of science
Search results with tag "Roofing industry"
Early 20th-Century Building Materials: Siding and Roofing
www.fs.fed.usThe American composition roofing industry emerged in the 1840s, and by the 1880s it was flourishing. Asphalt-im-pregnated fibers with or without aggregate (such as cinders) pressed into the exposed surface were packaged for roofing as long strips on rolls. A shift from roll roofing to hand-cut asphalt shingles began in 1903.