Like many aspects of drywall construction, its effectiveness depends heavily on your skill and knowledge. I have worked in the drywall industry for over 30 years and have managed my own business for about 15 of those years. I specialize in drywall repairs, and I firmly believe that mesh tape is the best tape to use for my specific applications. I’ve never had a callback due to tape failure, joint cracks, or related issues. While this doesn’t mean that mesh tape can never crack—any tape can— I’ve fixed thousands of cracks and have seen both paper and mesh tapes fail.

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The primary advantages of mesh tape are that you can apply it to the joint and immediately coat it, bringing you to the same step that using paper would take two days to reach. If you use fast-setting joint compound (also known as "hot mud"), you enjoy the added benefit of almost no shrinkage, which lets you finish the work faster and apply multiple coats in one day. Another significant advantage is that you can’t get blisters with hot mud, a common issue for most amateurs.

I have no trouble coating the tape and ensuring it doesn’t show because of my extensive experience and expertise. However, as an amateur, you may not reach the same level of quality, but with some extra effort, you can achieve results that are satisfactory for most cases.

I recommend checking out my YouTube channel at www.thatkiltedguy.com, where I have a video discussing this subject and many others that should help you a lot. Seeing a video is often more helpful than just hearing about it.

Thanks,
Guy, That Kilted Guy.com

Master the Art of Plastering with Fiberglass Mesh

Table of Contents

1. Introduction
2. Understanding the Need for Fiberglass Mesh
3. Benefits of Using Fiberglass Mesh
4. Where To Use Fiberglass Mesh
   • 4.1. Reskimming Older Properties
   • 4.2. External Renders
   • 4.3. Lath and Plaster Walls
   • 4.4. Bathroom Floors
   • 4.5. Other Applications
5. Choosing the Right Fiberglass Mesh
6. Preparing the Wall for Application
7. Installing Fiberglass Mesh
8. Applying the First Coat of Plaster
9. Dealing with Fraying and Joints
10. Applying the Second Coat and Finishing Touches
11. Conclusion

Introduction

Welcome to this comprehensive guide on fiberglass mesh and its applications in the construction industry. We will explore the benefits of using fiberglass mesh, where it can be utilized, and how to install it properly. Whether you are a professional plasterer or a DIY enthusiast, understanding the importance of this versatile product will help you achieve a flawless finish while preventing cracks and ensuring long-lasting results. Let's dive in and discover the wonders of fiberglass mesh!

Understanding the Need for Fiberglass Mesh

When working on older properties or surfaces with potential weaknesses, such as hairline cracks or loosened plaster, it is crucial to find a solution that can reinforce the skim coat and prevent further damage. This is where fiberglass mesh comes into play. Unlike traditional methods that rely on hessian or scrim tape, fiberglass mesh offers superior strength and durability, making it the go-to choice for crack prevention. By embedding this mesh into wet plaster, you create a flexible and resilient surface that withstands stress and movement, minimizing the risk of cracks appearing over time.

Benefits of Using Fiberglass Mesh

1. Crack Prevention: The primary benefit of fiberglass mesh is its ability to prevent cracks from forming in plastered surfaces. By reinforcing the skim coat, the mesh acts as a barrier that distributes stress and minimizes the chances of cracks appearing.

2. Versatility: Fiberglass mesh can be used in various situations, including reskimming older properties, external renders, lath and plaster walls, bathroom floors, and more. Its versatility makes it an essential tool for plasterers and builders.

3. Easy Installation: Applying fiberglass mesh is a straightforward process that does not require extensive training or specialized tools. With proper preparation and the right technique, anyone can achieve professional results.

4. Time and Cost-Efficiency: By using fiberglass mesh, you can save time and money by reducing the likelihood of callbacks or comebacks due to hairline cracks. The durable nature of the mesh ensures a long-lasting finish that will stand the test of time.

Where to Use Fiberglass Mesh

4.1 Reskimming Older Properties

Reskimming older properties is a common task for plasterers, often involving fragile walls and potential weaknesses. Fiberglass mesh can be a game-changer in these situations, as it reinforces the existing plaster and prevents hairline cracks from surfacing. By scraping off loose paint and removing any weak areas, you can create a sound surface ready for the application of fiberglass mesh and subsequent coats of plaster. This ensures a flawless finish without the worry of future cracks.

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4.2 External Renders

External renders, such as sand and cement or acrylic renders, can also benefit from the use of fiberglass mesh. By embedding the mesh in the render, you reinforce the surface and prevent cracks caused by weather changes and natural movements. This is particularly important in climates with temperature fluctuations or areas prone to seismic activities. The fiberglass mesh acts as a support system, ensuring the longevity and durability of the render.

4.3 Lath and Plaster Walls

For older properties with lath and plaster walls, fiberglass mesh is a savior. Instead of ripping off the existing plaster and starting from scratch, you can apply fiberglass mesh over the sound surface. As long as the plaster is not blown and there are just hairline cracks or surface cracking, the mesh will provide the necessary reinforcement to prevent further damage. This is especially beneficial when preserving historical elements, such as cornices or ceiling roses, as it eliminates the need for extensive renovations.

4.4 Bathroom Floors

Fiberglass mesh can also be used in tiling applications, particularly for bathroom floors. After ply-lining the floor and priming it for tile adhesive, embedding a layer of fiberglass mesh ensures the tiles' stability and prevents cracks or movement over time. This additional measure offers peace of mind and saves you from potential repair work down the line. By securing the tiles with a strong and supportive layer, the risk of cracks or tiles popping is significantly reduced.

4.5 Other Applications

Beyond the aforementioned applications, fiberglass mesh has found its way into various other situations within the building trade. From reinforcing resin renders to providing extra strength in floor screeds, this versatile product proves its worth across different tasks. Its affordability and effectiveness make it a go-to solution for construction professionals looking to enhance the quality and durability of their work.

Choosing the Right Fiberglass Mesh

When it comes to choosing fiberglass mesh, several factors should be considered. Firstly, ensure that the mesh is alkaline-resistant, as this is crucial for its longevity and effectiveness in plastering applications. Additionally, opt for a reputable brand that offers good value for money. While there are cheaper options available, it is essential to prioritize quality and durability over cost. Look for suppliers who specialize in plastering and rendering products, as they will have a better understanding of the specific requirements and can provide the right mesh for your needs.

Preparing the Wall for Application

Before installing fiberglass mesh, it is important to prepare the wall properly. This involves scraping off any loose paint, removing weak areas, and ensuring a clean and stable surface. Carefully inspect the wall for any signs of existing cracks or damage that need to be addressed before proceeding. Once the wall is ready, apply a good mix of PVA glue to create a strong bond between the mesh and the wall.

Installing Fiberglass Mesh

Installing fiberglass mesh involves rolling out the mesh in manageable lengths and stapling it to the wall using eight-millimeter arrow staples. Start from the top and work your way down, ensuring a 50-millimeter overlap and smoothing out any wrinkles or bunching along the way. Pay attention to corners, architraves, and sockets, making clean cuts with a sharp knife or decorating scissors. The goal is to achieve a tight and secure fit that will prevent the mesh from sagging or shifting during further application.

Applying the First Coat of Plaster

With the fiberglass mesh securely in place, it is time to apply the first coat of plaster. The mix should include a bonding coat for added body and strength. Start from the top and work your way down, using short stumpy sweeps to lay on the plaster and embed the mesh simultaneously. This technique ensures that the plaster fully covers the mesh, leaving no gaps or weak spots. When the first coat is complete, use a speed skin or trowel to achieve a smooth and even finish.

Dealing with Fraying and Joints

After the first coat has firmed up but is still workable, inspect the mesh for any fraying or joints poking through the plaster. These can cause issues later if left unaddressed. To fix this, let the plaster pick up a little and lay some scrim tape directly over the fraying areas or joints. This will hold back the burrs and ensure a seamless surface without visible mesh or joints.

Applying the Second Coat and Finishing Touches

Once the first coat has fully dried, apply the second coat of plaster. This coat can be a fresh mix without the need for a bonding coat, as the first coat has already provided the necessary strength and reinforcement. Apply the second coat using standard plastering techniques, focusing on achieving a smooth and even finish. Pay attention to corners, edges, and any imperfections that may require additional filling or polishing. Once the second coat is complete, allow the plaster to dry thoroughly before painting or further finishing as desired.

Conclusion

In conclusion, fiberglass mesh is a valuable tool in the world of plastering and construction. Its ability to prevent cracks and reinforce surfaces makes it a go-to solution for professionals and DIY enthusiasts alike. By understanding the benefits of using fiberglass mesh and its various applications, you can achieve flawless results and ensure the longevity of your work. So, next time you encounter a reskimming project or need to strengthen an older surface, consider using fiberglass mesh as your secret weapon.

If you want to learn more, please visit our website Fiberglass Mesh For Plastering.