Which surface typically requires curing for at least one month at 60°F or more before painting?

Which surface typically requires curing for at least one month at 60°F or more before painting?

• A. New plaster walls
• B. Drywall
• C. Wood
• D. Metal

Answer: (A)

New plaster walls require curing because plaster sets and dries slowly, continuing a chemical and moisture-release process after it’s applied. If you paint too soon, the moisture still migrating out can get trapped under the paint film, leading to blisters, staining, and poor adhesion that may crack later as the plaster fully cures. Allowing at least a month at 60°F (or warmer) gives the plaster time to complete its cure and dry to stable conditions, so primer and finish coats will bond properly and stay durable. Other materials like drywall, wood, or metal don’t rely on this extended curing period; they just need to be fully dry and properly prepared before painting.

New plaster walls require curing because plaster sets and dries slowly, continuing a chemical and moisture-release process after it’s applied. If you paint too soon, the moisture still migrating out can get trapped under the paint film, leading to blisters, staining, and poor adhesion that may crack later as the plaster fully cures. Allowing at least a month at 60°F (or warmer) gives the plaster time to complete its cure and dry to stable conditions, so primer and finish coats will bond properly and stay durable. Other materials like drywall, wood, or metal don’t rely on this extended curing period; they just need to be fully dry and properly prepared before painting.