Panels Sizes and Types
Drywall comes in 24-, 48-, and 54-inch widths; in 8-, 9-,
10-, 12-, 14-, and 16-foot lengths, and four thicknesses:
- 5/8 in. is the stiffest and provides the best
sound- proofing and fire retarding
- 1/2 in. is the most common single-layer sheet
- 3/8 in. is used in remodels over old walls
- 1/4 in. is easily bent to make curved surfaces
and is installed in two layers
For estimating drywall coverage, try
have a gypsum core with chemical additives and glass fibers. Fire codes require
their use on ceilings in garages and furnace rooms. Type X, the most common
used in homes, is 5/8 in. thick and has a one-hour fire rating.
are 30% lighter than regular drywall. They're used on ceilings. Most are ½-inch
thick, but a lightweight,, 5/8-in. Type X board is available for fire code
or MR drywall has a colored facing paper (the color depends on the
manufacturer) that's coated to make it resistant to water vapor (but not to
liquid water). It's used in humid areas: baths, laundries, utility rooms, and
returns around condensation-prone windows and skylights. It's prone to sagging,
and so should not be used on ceilings or as a tile substrate.
has a perm rating of .06 and doubles as a vapor retarder.
Soffit boards are
wrapped in a special moisture-resistant paper. They’re used on exterior soffits
and porch ceilings.
to read the full Field Guide