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A variety of issues can lead to separation of drywall joints in walls and ceilings. Both environmental factors as well as installation and design factors can contribute to situations where gypsum may develop cracks. The issue has become more widespread as homeowners insist on larger rooms and open floor plans that have large clear span areas. By understanding how and why partition separation or ridging and cracking occur, and by following best practices, designers and builders can reduce the risk of unsightly and costly issues with gypsum board and drywall.