4. Plywood and Drywall
Today's two most common home building materials no less than revolutionized the economics of housing. Both are sturdy, lightweight alternatives to the board sheathing and plaster used early this century. Moreover, these mass-produced panels in a standardized size cut down drastically on installation labor by eliminating extra handling, skilled finishing and a lot of cutting. The result: Buildings that go up faster, cost less to produce and, in most cases, are stronger and more flexible than those of the past.
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