The Best Stud Finder for Lath and Plaster Walls: A Comprehensive Guide

When it comes to working with lath and plaster walls, finding studs can be a challenging task. Unlike modern drywall constructions, lath and plaster walls are made of thin wooden strips (lath) covered with a plaster coating. This construction method, popular in older homes, adds complexity to locating studs because the plaster can obscure the wood. A reliable stud finder is essential for anyone working on these types of walls, whether for hanging pictures, installing shelves, or performing more significant renovations. In this guide, we will explore the best stud finders for lath and plaster walls, their features, and how to use them effectively.

Understanding Lath and Plaster Walls

Before diving into the best stud finders, it's important to understand the structure of lath and plaster walls. Lath and plaster construction involves three main components: the wooden lath, the plaster, and sometimes a wire mesh for added strength. The lath is typically thin strips of wood, spaced about 1/4 inch apart, which serve as a base for the plaster. The plaster is applied in layers, creating a smooth, durable surface.

This construction method was common before the advent of drywall in the mid-20th century. While lath and plaster walls are durable and can last for decades, they can be tricky to work with. The plaster can make it difficult to detect studs, especially if the wall has been painted or repaired over the years.

Challenges of Finding Studs in Lath and Plaster Walls

Finding studs in lath and plaster walls presents several challenges:

1. Plaster Thickness : The plaster layer can be quite thick, which can interfere with the ability of a stud finder to detect the wood behind it.
2. Lath Spacing: The thin wooden lath strips are spaced closely together, which can make it difficult to distinguish between the lath and the studs.
3. Wire Mesh: Some lath and plaster walls include a wire mesh for added strength, which can further complicate the detection process.
4. Paint and Finishes : Over time, walls may have been painted multiple times, or covered with wallpaper, which can interfere with the stud finder's sensors.

Features to Look for in a Stud Finder for Lath and Plaster Walls

When selecting a stud finder for lath and plaster walls, there are several features to consider:

1. Depth Detection : A stud finder with deep scanning capabilities is essential for penetrating the thick plaster layer.
2. Metal Detection : Many lath and plaster walls include wire mesh, so a stud finder with metal detection capabilities can help differentiate between the lath, studs, and wire.
3. Sensitivity Settings: Adjustable sensitivity settings allow you to fine-tune the device for different wall types and thicknesses.
4. Large Display : A clear, large display stud finder is important for easy reading, especially in dimly lit environments.
5. Durability: A sturdy, well-built device is necessary to ensure longevity, especially if you plan to use it frequently.

Top-Rated Stud Finders for Lath and Plaster Walls

1. Stabilti 730L Digital Stud Finder

The Stabilti 730L Digital Stud Finder is a top-rated stud finder specifically designed for lath and plaster walls. It features a deep scan mode that can penetrate up to 2 inches of plaster, making it ideal for older homes. The device also includes a metal detection mode, which helps identify wire mesh or other metal components within the wall.

• Key Features :
  • Deep scan mode for thick plaster walls.
  • Metal detection for wire mesh identification.
  • Large, easy-to-read digital display.
  • Adjustable sensitivity settings.
  • Compact and lightweight design.

2. Zircon AT320 IntelliScanner

The Zircon AT320 IntelliScanner is another excellent option for lath and plaster walls. This stud finder uses advanced technology to detect both wood and metal within the wall. Its IntelliScanner feature automatically adjusts to the wall type, making it user-friendly for those who may not be familiar with stud finders.

• Key Features :
  • Advanced metal detection for wire mesh.
  • Automatic wall type adjustment.
  • Clear digital display with multiple detection modes.
  • Long-lasting battery life.
  • Durable, ergonomic design.

3. Digi-Sensor DS-1000 Digital Stud Finder

The Digi-Sensor DS-1000 Digital Stud Finder is a versatile stud finder that performs exceptionally well on lath and plaster walls. It features a deep scan mode and metal detection, making it suitable for a variety of wall types. The device also includes a built-in level, which is a convenient feature for ensuring accurate measurements.

• Key Features :
  • Deep scan mode for thick plaster walls.
  • Metal detection for wire mesh identification.
  • Built-in level for accurate measurements.
  • Large, clear digital display.
  • Compact and portable design.

4. Lowe's ProSeries 3-in-1 Stud Finder

The Lowe's ProSeries 3-in-1 Stud Finder is a cost-effective option that offers excellent performance on lath and plaster walls. It combines a stud finder, a metal detector, and a voltage detector, making it a versatile tool for various projects. The device also includes a deep scan mode and adjustable sensitivity settings.

• Key Features :
  • 3-in-1 functionality (stud finder, metal detector, voltage detector).
  • Deep scan mode for thick walls.
  • Adjustable sensitivity settings.
  • Clear digital display.
  • Long-lasting battery life.

5. Klein Tools 60003 Stud Sensor

The Klein Tools 60003 Stud Sensor is a professional-grade tool designed for precise stud detection. It features a deep scan mode and metal detection, making it ideal for lath and plaster walls. The device also includes a built-in level and a laser pointer for accurate alignment.

• Key Features :
  • Deep scan mode for thick plaster walls.
  • Metal detection for wire mesh identification.
  • Built-in level and laser pointer for precise alignment.
  • Durable, ergonomic design.
  • Long-lasting battery life.

How to Use a Stud Finder on Lath and Plaster Walls

Using a stud finder on lath and plaster walls requires some patience and technique. Here are some tips for getting the most accurate results:

1. Start with a Clean Surface : Remove any paint, wallpaper, or other finishes from the area you plan to scan. This will help the stud finder's sensors work more effectively.
2. Use Deep Scan Mode : If your stud finder has a deep scan mode, make sure to use it for lath and plaster walls. This will help penetrate the thick plaster layer.
3. Adjust Sensitivity Settings: Experiment with the sensitivity settings to find the optimal level for your wall type. This can help reduce false readings and improve accuracy.
4. Scan Slowly and Methodically : Move the stud finder slowly across the wall, overlapping your previous scan area. This will help ensure you don't miss any studs.
5. Verify with a Drill : Once you've identified a potential stud, use a small drill bit to test the area. If you hit wood, you've found a stud.

Conclusion

Finding studs in lath and plaster walls can be a challenging task, but with the right tools and techniques, it becomes much more manageable. The stud finders mentioned in this guide are specifically designed to handle the unique challenges of lath and plaster walls, offering features like deep scan modes, metal detection, and adjustable sensitivity settings. By investing in a high-quality stud finder and following the tips provided, you can confidently locate studs and complete your projects with ease.