Why Does Drywall Take Longer to Dry Than Hardwood?

Drywall is a porous material made from gypsum plaster sandwiched between paper facings. This construction acts like a sponge, pulling water deep into its core and saturating the paper layers. In contrast, finished hardwood is a dense, non-porous surface where water tends to pool on top or seep only into seams. This fundamental difference in absorption dictates the initial speed of water penetration and how long moisture is retained within the material.

Water in drywall gets trapped inside the gypsum core and behind the wall, where evaporation is very slow. The pros use specialized equipment to create airflow and dehumidify the cavity to draw this moisture out. Hardwood allows for more direct surface evaporation into the room air. The slower evaporation rate within a closed wall assembly is a key reason the overall drying process for drywall is measured in days, while surface-dried hardwood may be addressed more quickly under proper conditions.

Effective drying requires controlling humidity, temperature, and airflow precisely around the wet materials. For drywall, this often means cutting access holes, injecting dry air, and using industrial dehumidifiers for an extended period. The process is more invasive and time-consuming than drying a hardwood floor. Local water damage pros have the tools to monitor moisture deep inside walls and ensure both materials are dried properly to prevent future issues like mold or structural weakness.