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Drywall can be installed directly on ceiling joists. In fact, this method is common in many construction projects. Drywall sheets are attached to the joists using screws, ensuring a secure and stable installation. Before attaching the drywall, it's important to mark the joist locations on the ceiling, allowing for accurate screw placement. Proper spacing between screws and careful taping and mudding of joints are crucial to creating a smooth and flawless ceiling surface. If the joists are in good condition and level, installing drywall directly on them is a practical and efficient approach.

Drywall mud should be left to dry for at least 24 hours before sanding, though drying time depends on the thickness of the application, humidity, and room temperature. Thicker layers or projects done in high humidity may require 48 hours or more of drying time. You’ll know the mud is ready when it feels completely dry and appears light in color throughout. Sanding too early can cause smudging or gouges, so patience is key for a smooth, professional-looking finish.

Yes, wainscoting is installed directly over drywall. However, ensure the drywall is in good shape since it will support the wainscoting. If the drywall has issues, such as holes, mold, or mildew, repair them before installing the wainscoting. Alternatively, you can install a plywood substrate before attaching the trim.

The average life span for drywall is between 40 and 60 years, although panels can last significantly longer in many cases if it’s well-maintained. Of course, many things can reduce the life span of your drywall, including fire, smoke damage, water, moisture, and physical damage, like dents and holes. Thankfully, you’re likely to get around 50 years of value out of professionally-installed drywall, making the $2,000 you’ll spend on the job well worth it in the long run.