How to Get Rid of Bubbles on Drywall Tape: A Complete Guide for Flawless Walls

When you notice bubbles or blisters on your drywall tape, it can be frustrating. These little imperfections may seem harmless at first, but they can make your walls look uneven and unprofessional. The good news? You can fix drywall tape bubbles quickly, and prevent them from coming back. In this guide, you’ll learn why these bubbles happen, how to repair them step-by-step, and the tools and techniques you need for long-lasting results.

Whether you’re a DIY enthusiast or a professional contractor, following the right methods ensures smooth, flawless walls that look like they were done by an expert. Let’s dive in.

1 Understanding Drywall Tape Bubbles

Drywall tape bubbles happen when the tape that seals the seams between drywall sheets doesn’t adhere properly. The result is raised areas or air pockets under the tape, which can become more visible after painting.

Here’s what causes them:

1.1 Insufficient Compound

If you don’t apply enough joint compound (mud), the tape won’t stick properly. A thin or uneven layer leaves voids where bubbles can form. When you add a second coat too quickly, the tape absorbs moisture unevenly, causing bulges.

Tip: Always apply a uniform 1/6-inch layer of compound to fully embed the tape.

1.2 Trapped Air

Air pockets under the tape are another common cause. If you don’t press the tape firmly while applying it, tiny bubbles get trapped, expanding as the compound dries.

Tip: Use a taping knife to smooth the tape from the center outward, removing all air pockets. Wetting the tape lightly before application helps it adhere better.

1.3 Dusty Surfaces

Even the cleanest walls can have dust that prevents the tape from bonding. Dust between the tape and drywall creates air pockets, which eventually turn into bubbles.

Tip: Wipe the surface with a damp cloth before taping to ensure a clean, debris-free surface.

1.4 Improper Bedding

“Bedding” means embedding the tape fully into the joint compound. If done incorrectly, bubbles will appear.

Tip: Press the tape evenly into the mud with a putty knife, smoothing out wrinkles and ensuring tight contact with the wall.

1.5 Environmental Factors

Humidity, temperature swings, or poor ventilation can interfere with drying. High moisture levels weaken adhesion, leading to blisters and bubbles.

Tip: Work in stable conditions and avoid applying compound in extremely humid or hot environments.

2 Essential Repair Tools You’ll Need

Having the right tools makes the job easier and ensures professional results:

• Putty Knife: Smooths tape and spreads compound evenly. Wide blades for large areas, narrow ones for corners.
• Utility Knife: Cuts out bubbled tape without damaging surrounding drywall.
• Drywall Tape and Compound: Choose high-quality paper or mesh tape and joint compound. Thin layers work best.
• Measuring Tape and Pencil: Marks repair areas for precise cuts and placements.
• Trowel: Helps spread joint compound smoothly across seams.
• Sandpaper & Damp Sponge: Light sanding smooths dried compound; sponge helps blend edges.

3 Step-by-Step Guide: How to Fix Drywall Tape Bubbles

Follow these steps to repair bubbled tape and achieve smooth, professional-looking walls.

3.1 Remove Hardened Compound and Cut Out the Bubbled Tape

• Use a utility knife to carefully cut out the bubbled section.
• Scrape away any hardened compound left behind.
• Make sure the surface is smooth and free of debris.

3.2 Apply a Fresh Layer of Joint Compound

• Spread a thin, even layer (about 1/6 inch) of joint compound over the exposed seam.
• Avoid thick layers, which can introduce new bubbles.
• Let it dry completely, typically 24 hours.

3.3 Place a New Piece of Tape

• Cut a piece slightly longer than the seam.
• Overlap the new tape about ½ inch with existing tape.
• Press the tape firmly into the compound, smoothing out air pockets.

3.4 Smooth the Tape and Apply Additional Compound

• Drag a putty knife along the tape to embed it fully.
• Apply a second thin coat to feather the edges, allowing each layer to dry thoroughly.
• Sand lightly for a smooth finish.

4 Paper Tape vs Mesh Tape: Which is Better?

Both types of tape have pros and cons. Choosing the right one depends on your project:

4.1 Paper Tape

• Provides a smooth, professional finish.
• Stronger in load-bearing joints.
• Needs to be embedded in joint compound.
• Takes longer to set, but results in a seamless wall.

4.2 Mesh Tape

• Self-adhesive and easier to install.
• Ideal for DIY projects and quick repairs.
• Less durable than paper tape and may crack over time.
• Easier to fold into corners.

5 Proactive Bubble Prevention Tips

Preventing bubbles is easier than fixing them. Here’s how to stop them before they start:

• Apply the proper amount of joint compound. Too little causes poor adhesion, too much can trap air.
• Press tape firmly with a flexible 5″ taping knife. Start in the middle and smooth outward.
• Work in controlled conditions with moderate humidity and temperature.
• Lightly dampen tape before application to prevent uneven absorption.
• Let each coat dry fully before adding the next.

6 The Unseen Culprits Behind Bubbles

Sometimes, bubbles indicate deeper issues:

6.1 Poor-Quality Tape

• Cheap tape with uneven thickness or weak adhesive can fail.
• Inspect tape before use and buy from reputable brands.

6.2 Moisture Infiltration

• High humidity or leaks can lift tape and create blisters.
• Use waterproof primer or improve ventilation in moisture-prone areas.

6.3 Improper Drywall Installation

• Thick, uneven mud or rushed application can trap air.
• Apply thin layers (1/6 inch), smooth each, and let dry before the next.

Conclusion

Repairing drywall tape bubbles is a doable DIY project with the right approach, tools, and patience. By understanding the causes — from poor application to moisture issues — and taking preventive measures, you can ensure smooth, flawless walls that last.

Whether you choose paper tape for a professional finish or mesh tape for convenience, the key is proper embedding, careful smoothing, and controlled drying conditions.