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Drywall
If your home was built in the last 50 years or so, you're probably surrounded by the stuff. Give it a knock and you'll hear that familiar echo. Drywall is the most commonly used interior wall finish material today-having usurped those thick, plaster and lath walls that were ubiquitous until World War II. Also called gypsum board or sheet rock, it is made of paper-typically recycled, unbleached paper-over a core of gypsum, a mineral compound. Drywall made with either recycled or synthetic gypsum is a greener choice than that made with new, mined gypsum; synthetic gypsum is made from a coal-combustion waste product, so it reduces waste, saves energy, and averts the environmental damage caused by mining. |