The best tape for drywall seams is typically paper tape. Paper tape is preferred by many professionals due to its strength and ability to create a smooth, flat finish. It is non-adhesive, requiring a layer of joint compound to adhere it to the drywall, which helps it integrate seamlessly into the surface. Paper tape is also resistant to stretching and tearing, which minimizes the risk of cracks developing over time. For those who prefer an easier application, fiberglass mesh tape is another popular option. It is self-adhesive, making it quicker to apply, and is particularly useful for patching repairs or when working with new drywall installations. However, mesh tape is more prone to cracking if not properly embedded in joint compound, and it may require additional layers of compound to achieve a smooth finish. In areas prone to moisture, such as bathrooms or kitchens, mold-resistant paper tape or fiberglass tape treated with anti-microbial agents can be beneficial to prevent mold growth. Ultimately, the choice between paper tape and fiberglass mesh tape depends on the specific needs of the project, the skill level of the installer, and the environmental conditions of the space.

1. **Preparation**: Ensure the drywall seams are clean and free of dust. Cut the drywall tape to the required length for each seam. 2. **Mix Joint Compound**: Prepare the joint compound to a smooth, workable consistency. Use a pre-mixed compound or mix powdered compound with water. 3. **Apply First Coat**: Using a 4-6 inch drywall knife, apply a thin layer of joint compound over the seam. The layer should be about 1/8 inch thick and slightly wider than the tape. 4. **Place the Tape**: Center the drywall tape over the seam. For paper tape, press it into the compound using your fingers or the knife. For mesh tape, simply stick it onto the seam as it is self-adhesive. 5. **Embed the Tape**: Run the drywall knife over the tape at a 45-degree angle, applying firm pressure to embed the tape into the compound. Remove excess compound from the edges. 6. **Smooth the Surface**: Apply a thin layer of compound over the tape, feathering the edges to blend with the drywall surface. Ensure the tape is fully covered. 7. **Dry and Sand**: Allow the compound to dry completely, usually 24 hours. Lightly sand the surface with fine-grit sandpaper to smooth out any imperfections. 8. **Apply Additional Coats**: Apply 2-3 more coats of joint compound, each slightly wider than the previous, allowing drying and sanding between coats. 9. **Final Sanding**: After the final coat dries, sand the area smoothly, ensuring the seam is flush with the drywall surface. 10. **Clean Up**: Remove dust and debris from the area. The seam is now ready for priming and painting.

Yes, you can use mesh tape for drywall seams. Mesh tape is a self-adhesive, fiberglass material that is commonly used in drywall installation and repair. It offers several advantages, such as being easy to apply due to its adhesive backing, which eliminates the need for a separate layer of joint compound to hold it in place initially. This can make the process quicker and more efficient. Mesh tape is particularly effective for butt joints and repairs because it is less likely to bubble or blister compared to paper tape. Its open weave allows joint compound to penetrate through, creating a strong bond. However, it is important to use setting-type joint compound (also known as hot mud) with mesh tape, as it provides a stronger bond and reduces the risk of cracking. This type of compound sets through a chemical reaction, making it more durable than pre-mixed compounds. While mesh tape is convenient, it is not always the best choice for all situations. For tapered seams, paper tape is often preferred because it is thinner and can be embedded more smoothly, resulting in a less noticeable seam. Additionally, paper tape is generally stronger in terms of tensile strength, which can be beneficial in areas prone to movement or stress. In summary, mesh tape is a viable option for drywall seams, especially for quick repairs and butt joints, but it should be used with setting-type joint compound for optimal results. For tapered seams or areas requiring extra strength, paper tape might be a better choice.

Paper drywall tape is made from a thin, paper material and is traditionally used for taping drywall seams. It is non-adhesive, requiring a layer of joint compound to adhere it to the drywall. Paper tape is strong and provides a smooth finish, making it ideal for flat seams and inside corners. It is less prone to cracking over time when applied correctly. Mesh drywall tape, on the other hand, is made from a fiberglass mesh and is self-adhesive, allowing for easier application. It is often used for repairs and is particularly effective for patching holes or cracks. The mesh design provides extra strength and flexibility, reducing the risk of cracking. However, it can be more visible under the joint compound if not applied properly, and it may require more compound to achieve a smooth finish. In summary, paper tape is preferred for its smooth finish and strength in flat seams and corners, while mesh tape is favored for its ease of use and effectiveness in repairs.

To prevent drywall tape from bubbling, follow these steps: 1. **Surface Preparation**: Ensure the drywall surface is clean, dry, and free of dust. Sand any rough areas and remove debris to create a smooth base for the tape. 2. **Use the Right Tape**: Choose high-quality paper tape or mesh tape. Paper tape is less prone to bubbling when applied correctly, while mesh tape is self-adhesive and easier for beginners. 3. **Proper Mud Consistency**: Mix joint compound to a smooth, creamy consistency. Avoid overly thick or watery mud, as this can lead to poor adhesion and bubbling. 4. **Apply a Thin Base Coat**: Use a taping knife to apply a thin, even layer of joint compound over the seam. Ensure the coat is wide enough to accommodate the tape. 5. **Embed the Tape Correctly**: Place the tape over the wet compound and press it in with a taping knife. Start from the center and work outwards to remove air bubbles. Apply firm, even pressure to ensure the tape is fully embedded. 6. **Remove Excess Compound**: Scrape off excess compound from the edges of the tape with the taping knife. This helps prevent the tape from lifting and bubbling. 7. **Apply Additional Coats**: Once the first coat is dry, apply two to three additional coats of joint compound, feathering the edges to blend with the wall. Allow each coat to dry completely before applying the next. 8. **Sand Between Coats**: Lightly sand between coats to smooth out any imperfections. Use fine-grit sandpaper to avoid damaging the tape. 9. **Control Humidity and Temperature**: Maintain a stable environment with moderate humidity and temperature to ensure proper drying and adhesion of the compound. 10. **Avoid Overworking**: Do not overwork the tape or compound, as this can introduce air and cause bubbling.

Three coats of mud are typically needed for drywall tape. The first coat, known as the "bedding coat," is applied to embed the tape into the joint. The second coat, or "fill coat," is used to cover the tape and smooth out the joint, ensuring that the surface is even. The third coat, called the "finish coat," is applied to feather out the edges and create a seamless transition between the taped area and the drywall surface. Each coat should be allowed to dry completely before applying the next, and sanding may be necessary between coats to achieve a smooth finish.

Drywall tape can crack due to several factors: 1. **Structural Movement**: Buildings naturally settle over time, causing shifts that can lead to stress on drywall joints. This movement can cause the tape to crack as the drywall panels shift. 2. **Temperature and Humidity Changes**: Fluctuations in temperature and humidity can cause drywall to expand and contract. This movement can stress the joints and lead to cracking of the tape. 3. **Improper Installation**: If the drywall tape is not properly embedded in joint compound or if insufficient compound is used, the tape may not adhere correctly, leading to cracks. Additionally, failing to allow each layer of compound to dry completely before applying the next can weaken the joint. 4. **Poor Quality Materials**: Using low-quality drywall tape or joint compound can result in a weaker joint that is more prone to cracking. Paper tape, for example, is more susceptible to cracking than fiberglass mesh tape. 5. **Insufficient Drying Time**: Not allowing the joint compound to dry thoroughly between coats can lead to weak joints. This can cause the tape to crack as the compound continues to shrink and settle. 6. **Excessive Moisture**: Water damage from leaks or high humidity can weaken the joint compound and tape, leading to cracking. Moisture can also cause the drywall itself to swell and contract, stressing the joints. 7. **Vibration and Impact**: Vibrations from nearby construction, heavy traffic, or even loud noises can cause stress on drywall joints. Physical impacts, such as doors slamming or objects hitting the wall, can also lead to cracks. 8. **Foundation Issues**: Problems with the building's foundation can cause significant structural shifts, leading to widespread cracking in drywall tape and other areas.