Definition
Drywall (gypsum wallboard) covers interior walls and ceilings to create finished surfaces. It provides fire resistance, sound dampening, and a substrate for paint. Installation involves fastening, taping joints, applying compound, and finishing. Installation quality affects final appearance and prevents cracks.
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Drywall consists of gypsum core wrapped in paper layers. Standard drywall (type X) provides 1-hour fire rating. Moisture-resistant drywall (greenboard) is used in bathrooms. Sound-dampening drywall includes acoustic damping. Installation involves fastening with nails or screws, taping joints, applying joint compound, and finishing. Proper installation technique prevents nail pops, cracks, and finish problems. Thickness is typically 5/8 inch in residential construction.
Pro Tip
Drywall finish quality varies significantly. Inspect before painting. Poor taping and finishing requires costly corrections.
Example
Interior walls are framed and covered with 5/8-inch fire-rated drywall, with all joints taped and finished smooth for paint.