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Regular Drywall
Regular (gray) drywall is the most common type of drywall and it’s the only kind many people are familiar with. All drywall has one thing as its core—gypsum, a common mineral found globally. In regular drywall, and most other types as well, gypsum is sandwiched between two layers of paper. There is paper on the back (usually brown) and the face, which, in the case of regular drywall, is gray. It can be used throughout a house and comes in a number of drywall dimensions—the most common size is a 4-foot by 8-foot sheet. And, as the most common type of drywall, it is also the cheapest, selling for about $12 per 4-foot by 8-foot sheet, depending on where you live.
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Green Drywall
Green drywall is a type of drywall that’s mold resistant and is used in applications where moisture can be an issue—so most commonly, bathrooms. To maximize the mold resistance, use mold-resistant drywall mud, aka joint compound. Green drywall generally costs about 20% more than regular drywall.
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