Drywall, also known as gypsum board or sheetrock, is typically manufactured with a smooth white paper surface on both sides. The white side is the standard facing and is meant to be visible after installation. The brown side, also known as the back or reverse side, is not intended to be exposed and is typically placed against the framing during installation.
Here's why you should not use the brown side of drywall:
Appearance: The brown side of drywall is not finished and lacks the smooth, paint-ready surface found on the white side. If you were to use the brown side, it would result in an uneven, rough-textured appearance that is not suitable for painting or finishing.
Durability: The brown side is not as durable as the white side. The white side is specially treated to resist moisture and damage, making it more suitable for interior wall surfaces.
Absorption of Moisture: The brown side is more absorbent than the white side. If it comes into contact with moisture, it may warp, weaken, or develop mold, causing structural issues and potential health hazards.
Fire Resistance: Drywall is treated to be fire-resistant, but this feature is only present on the white side. Using the brown side could compromise the fire-resistant properties of the material.
When installing drywall, always ensure that the white side faces out and is the visible surface. The brown side should be placed against the framing, studs, or joists. This will provide a smooth, paintable surface for finishing, and the treated white side will enhance the durability and fire resistance of the walls.
If you accidentally install drywall with the brown side facing out, it's best to remove it and re-install it with the correct orientation. Attempting to paint or finish the brown side directly will likely result in an unsatisfactory and problematic surface.