Using USG's new Next Generation Sheetrock Brand Gypsum Panels is another time saver, said McGovern. Introduced in January, these panels are designed to snap more crisply and cleanly, requiring much less rasping time to smooth the edges. Also, they are more rigid, making them easier to carry and hang. The temperature must be no less than 50 F for two days before applying finishing materials, or you can run into job delays, joint cracking, and bonding failures. It's best to use a building's central heating system to ensure proper temperature conditions, since temporary heaters can produce fumes that stain surfaces and add water vapor to the air.
Relative humidity is just as bothersome, as it slows drying.
In fact, the act of joint compounds and paints drying adds to the problem. To reduce humid conditions, raise the temperature and provide adequate ventilation. Controlling the temperature and the humidity is worth the effort to prevent problems and delays. From lifting heavy drywall sheets to bending, reaching, and stretching, contractors experience fatigue and muscle strain that can really impact the bottom line of their business. The productivity of fatigued workers decreases while their mistakes increase, and productivity is zero when a worker has to take time off for physical therapy.