Drywall vs Plaster: What's in Your Walls?

If your home was built before 1950, there's a good chance you have plaster walls instead of drywall. They look similar but need different care. Here's how to tell what you have.

The Pushpin Test

Try to push a pin into your wall:

• Goes in easily = drywall
• Barely goes in or won't = plaster

The Knock Test

Knock on the wall with your knuckle:

• Hollow sound = drywall
• Solid sound = plaster

Look at the Damage

Find an existing hole or damage (or check inside a closet):

• Uniform white or gray board with paper facing = drywall
• Hard surface over wood strips (lath) = plaster

Why It Matters

For repairs: Plaster repairs are different than drywall repairs. Regular joint compound doesn't bond well to plaster. You need special plaster repair products or techniques.

For hanging things: Plaster is harder and more brittle. You can't just drive a nail in anywhere - it'll crack. Drill pilot holes and use appropriate anchors.

For renovations: Plaster is harder to cut and modify. Running new electrical or plumbing through plaster walls takes more work.

Pros and Cons

Plaster advantages: - Harder, more durable surface

• Better soundproofing
• More fire resistant
• Feels more solid

Drywall advantages: - Easier to repair

• Easier to modify
• Less expensive to install
• Most contractors know how to work with it

Mixing Them

Some homes have both - plaster in original areas and drywall where additions or repairs were made. This is fine, but you need to know what you're working with in each area.

If you have plaster, don't let anyone convince you to tear it out unless there's a good reason. It's superior material that just needs proper care. For drywall repairs, check out how to fix small holes and matching wall texture after repair.