When Should You Replace Drywall Instead of Patching It?

How to Replace a Section of Drywall

Drywall Tools and Materials

Before you start, gather these tools and supplies:

• A drywall patch or a new piece of drywall
• Drywall saw
• Joint compound (also called drywall mud)
• Joint tape (aka drywall tape, paper tape, fiberglass mesh tape)
• Drywall screws or repair clips (depending on type of repair)
• Drill or screwdriver
• Sandpaper or sanding sponge (fine grit)
• Utility knife
• Putty knife (aka joint knife, drywall knife)
• 6-inch drywall knife or 12-inch drywall taping knife (for larger repairs)
• Wall paint and primer
• Paint Brush

Replacing Part of a Drywall Panel

Replacing part of a drywall panel can sound intimidating, but it’s manageable with the right approach. This process works well for moderate damage that doesn’t require replacing an entire drywall panel.

1. Mark the damaged area: Use a ruler or straightedge to outline the piece you need to remove. Cut a square shape or rectangle for easier replacement. (Sometimes we reverse this process and cut the square piece of patch first THEN mark the square hole.)
2. Cut out the damaged section: Use a utility knife or plunge saw to carefully cut along your lines. Be cautious of electrical wires or pipes behind the wall.
3. Attach support strips: If there are no wall studs present, place wooden furring strips inside the wall behind the outer edges of the square hole and secure the piece of wood with drywall screws. This will support the new drywall patch.
4. Install the replacement piece: Cut a piece of drywall to fit the hole, then screw it into the support strips. Make sure the screw heads are just below the drywall surface.
5. Tape and mud the seams: Apply drywall tape over the seams, then cover with joint compound. Smooth it out with a 6-inch drywall knife knife, let it dry, and sand rough edges, wipe it down with a tack cloth or damp soft cloth to get rid of loose debris, and repeat this process until you have a smooth surface.
6. Prime and paint: Once the patched area is smooth, plan to prime and paint to match the rest of the wall. If you have surface texture, try and match the texture.

Signs You Need to Replace Drywall Entirely

Sometimes, patching or replacing a small section isn’t enough, and the entire drywall panel needs to go. Here are a few indicators:

• Widespread water damage: If water damage affects more than one section of the wall, replacing the whole panel is often necessary.
• Persistent mold issues: Even if you remove visible mold, spores may remain inside the drywall. Replacement is the safest option.
• Structural damage: If the drywall is part of an entire wall that has shifted, replacing the panel ensures proper repair of both the wall and the drywall.
• Multiple patches in one area: If a section of wall has been patched several times, it may start to look uneven; a replacement piece provides a clean slate.

Replacing an entire sheet can seem like a big job, but it’s often worth the effort for severe or widespread issues.

Quick Tips for Patching or Replacing Drywall

To make decisions easier, here are some quick guidelines:

• Patch it if...
• The hole or crack is small (under 6 inches).
• The damage is cosmetic, such as dents or surface-level scratches.
• There’s no sign of water damage or mold.
• Replace it if...
• The hole is too large for a simple wall patch.
• There’s water damage, mold, or sagging in the sheet of drywall.
• The wall has been patched so many times it’s uneven.

FAQ

What tools do I need to replace a hole in drywall?

To replace a section of drywall, you’ll need basic tools like a utility knife, a drywall saw, a putty knife, a screwdriver or drill, and sandpaper. You’ll also need materials like replacement drywall, drywall tape, joint compound, and screws. If you’re dealing with larger holes, wood strips for support and a measuring tape are also helpful.

Should I patch or replace drywall if I’m selling my house?

If you’re preparing to sell your home, small repairs like patching holes from nails and cracks are usually enough to improve its appearance. But for major repairs, like large holes or water-stained drywall, replacing the affected areas can make a bigger impact on buyers. Fresh, satin smooth surfaces can give the home a more polished and well-maintained feel.