Good for large jobs and ceilings where weight matters.
Moisture-resistant drywall (often called “green board”)
Better in humid areas.
Use for bathroom walls outside the shower area, laundry rooms, and some basements.
Not a waterproof product.
Mold-resistant drywall (often “purple” board, varies by brand)
Adds mold resistance compared to standard.
Useful in bathrooms, basements, and rentals where humidity is common.
Paperless drywall (fiberglass-faced)
No paper face.
Helps reduce mold risk.
Often used in damp-prone areas, basements, and commercial work.
Cement board
Not drywall, but used with drywall systems.
Use in showers and wet tile areas.
Handles water far better than gypsum boards.
Glass-mat gypsum / tile backer panels
Made for wet-area tile systems.
Common behind tile when a gypsum-based backer is allowed by the system.
Fire-rated drywall (Type X, Type C)
Built for fire-resistance assemblies.
Common in garages, multi-family walls/ceilings, and mechanical rooms.
Thickness often 5/8 inch.
Sound-rated and impact-resistant boards
Sound boards and specialty panels reduce noise transfer when paired with the right assembly.
Abuse-resistant and impact-resistant boards hold up better in hallways, rentals, and commercial spaces.
Shaftliner and specialty core boards
Used for elevator shafts and vertical chases.
Not typical for standard home remodel work.
Drywall Sizes
Common drywall thicknesses
1/4 inch: Curves, wrapping surfaces, or covering an existing wall to smooth it out.
3/8 inch: Light-duty, sometimes used for repairs or specific layering needs.
1/2 inch: Standard for most interior walls.
5/8 inch: Standard for many ceilings and fire-rated assemblies.
Common drywall sheet widths
4 feet wide (48 inches): Standard.
54 inches (4.5 feet): Used to reduce butt joints on tall walls and some ceilings.
Common drywall sheet lengths
8 feet
9 feet
10 feet
12 feet
14 feet (less common)
16 feet (less common)
Longer sheets reduce butt joints but they are harder to handle when hanging drywall and easier to damage during carrying.
Quick choosing tips
For walls
Residential Drywall Installation Job: 1/2 inch standard or lightweight
High-traffic rentals: consider impact-resistant
Basements and humid areas: mold-resistant or paperless, based on the moisture risk
For ceilings
Many ceilings: 5/8 inch helps reduce sag and feels stiffer
Short spans can use 1/2 inch, but 5/8 inch often finishes flatter
For bathrooms
Outside shower: mold-resistant can make sense
Inside shower: cement board or approved tile backer system, not standard drywall
If you tell me what room you’re working on (bath, basement, garage, ceiling height, framing spacing), I’ll recommend the best drywall type and size for that exact situation.
