Drywall - Interior Wallboard Repair Guide for Homes

Drywall is a gypsum-core wallboard panel used to create the finished walls and ceilings inside most modern homes.

Drywall diagram — labeled parts, dimensions, and installation context

What It Is

Drywall provides a fast, consistent interior surface over framing so rooms can be taped, finished, painted, and occupied. It is one of the most common interior finish materials in residential construction.

Different drywall products are made for standard walls, moisture-prone rooms, fire-rated assemblies, and impact-prone conditions.

Types

Common types include standard drywall, moisture-resistant board, fire-rated Type X drywall, and abuse- or mold-resistant specialty panels.

Where It Is Used

Drywall is used on interior walls and ceilings in bedrooms, living areas, kitchens, garages, and many basements and utility spaces.

How to Identify One

Drywall is a rigid panel with a gypsum core and paper faces. Cracks, popped fasteners, soft spots, and damaged taped joints are common visible signs of trouble.

Replacement

Replacement is needed when panels are water-damaged, mold-affected, broken, sagging, or cut up during major repair work. The correct replacement type should match the room and any required fire or moisture rating.

Drywall — FAQ

What is drywall made of?

Drywall is made from a gypsum core faced with paper or similar surface materials. The gypsum gives the panel its shape and fire-resistant qualities.

Can wet drywall be dried and saved?

Sometimes after very limited exposure, but drywall that stays wet, softens, or grows mold is usually removed and replaced.

What is the difference between regular drywall and green board?

Green board is a moisture-resistant type of drywall intended for more humid areas, though it is not a substitute for proper tile backer in wet shower zones.

Why are there cracks in my drywall?

Cracks can come from house movement, poor taping, framing shrinkage, or moisture problems. The location and pattern help determine the likely cause.