The general consensus is that popcorn ceilings should be removed when they become stained, water-damaged, or start to crumble. If any of these issues are detected, it's best to have the ceiling removed as soon as possible to avoid further damage.

It's best to remove a popcorn ceiling when it's in bad condition and needs to be replaced. The plaster or drywall may start to crack and crumble, and the texture can become stained and dirty. If there are water leaks or other damage, it's also a good time to remove the ceiling.