I recently remodeled my living room and had to install a new ceiling. Because of the cost and weight of drywall and my lack of experience, I decided to use 3/8-in. thick drywall instead of the 5/8-in. stuff my friends recommended. After mudding and prepping the seams, I finished the ceiling with a “wet” blown-on ceiling texture. Much to my surprise, before the plaster could dry, the drywall warped and created a roller coaster effect on the ceiling. So much for the thin-drywall shortcut!