What Is an Expanded Metal Lath Sheet?

An expanded metal lath sheet is a thin, lightweight, high-strength metal sheet formed by slitting and expanding cold-rolled steel into a uniform diamond pattern. It is designed to mechanically lock plaster, stucco, mortar, and concrete coatings to walls, ceilings, and columns.

Unlike welded wire lath, expanded metal lath sheet is made from a single solid sheet with no welds, ensuring it will not break, separate, or deteriorate over time. Most lath sheets are protected by hot-dip galvanized coating for long-term rust resistance in both interior and exterior environments.

It is an essential building material for plaster reinforcement, stucco systems, wall repair, curved surfaces, and fireproofing applications. Our lath sheets are manufactured with strict dimensional accuracy for consistent performance on job sites.

Standard Specifications of Expanded Metal Lath Sheet

All our expanded metal lath sheet products comply with ASTM A820, the international standard for metal lath used in plaster and stucco systems. We also offer custom thicknesses, sizes, and materials for specialized construction requirements.

Main Types of Expanded Metal Lath Sheet

We produce three professional types of expanded metal lath sheet to meet different construction needs:

1. Standard Flat Lath Sheet
General-purpose flat lath sheet for smooth interior walls, ceilings, and basic plaster reinforcement. The most economical choice for indoor projects.

2. Self-Furring Lath Sheet
Features raised dimples that create a 1/4-inch gap behind the sheet, allowing plaster to fully encapsulate the mesh for maximum bonding strength. Ideal for exterior stucco walls and high-performance systems.

3. Corner Lath Sheet
Pre-bent 90-degree lath sheet for reinforcing internal and external wall corners. Provides straight, durable corners that resist chipping, cracking, and impact damage.

All types are available in galvanized and stainless steel finishes to suit indoor, outdoor, and corrosive environments.

Key Advantages of Expanded Metal Lath Sheet

Expanded metal lath sheet is the preferred reinforcement material for professional plastering and stucco applications due to its unique benefits:

1. Superior Bonding Strength
The diamond pattern deeply locks plaster and stucco in place, preventing cracking, peeling, and delamination for decades.

2. One-Piece Structural Integrity
No welds or joints – made from a single metal sheet. Will not break or separate under stress, unlike welded wire lath.

3. Excellent Flexibility
Easily bends to fit curved walls, arches, columns, and irregular surfaces. Perfect for architectural design elements.

4. Rust & Corrosion Resistance
Hot-dip galvanized coating provides long-lasting protection against moisture and corrosion, suitable for outdoor use.

5. Lightweight & Easy Installation
Easy to cut, handle, and fasten. Reduces labor time and installation costs on construction sites.

6. Versatile Application
Used for interior plaster, exterior stucco, masonry repair, fireproofing, and insulation systems.

Common Applications of Expanded Metal Lath Sheet

Expanded metal lath sheet is widely used across residential, commercial, and industrial construction projects:

• Interior Plaster Walls & Ceilings: Reinforces plaster to prevent cracks and improve durability
• Exterior Stucco Systems: Core reinforcement layer for building exterior stucco walls
• Curved Surfaces & Arches: Flexible design for columns, domes, and curved architectural features
• Masonry Repair & Renovation: Repairs damaged concrete, brick, and stone walls
• Fireproofing Coatings: Supports fireproofing mortar on structural steel beams
• Exterior Insulation Systems (EIFS): Reinforcement layer for insulation and finish systems
• Swimming Pool Plaster: Stainless steel lath for pool interior plaster reinforcement

Professional Installation Guide for Expanded Metal Lath Sheet

Correct installation ensures maximum performance and longevity of expanded metal lath sheet. Follow these professional steps:

1. Surface Preparation
Clean the wall surface to remove dust, grease, and loose materials. Install waterproof building paper for exterior applications.

2. Cutting & Fitting
Cut lath sheets to size using metal shears. Overlap adjacent sheets by 1 to 2 inches for continuous reinforcement.

3. Fastening the Sheet
Secure lath to wood or metal studs using galvanized nails or screws, spaced 6 inches apart. Ensure the sheet is tight and flat.

4. Corner Installation
Install corner lath at all internal and external corners. Overlap and fasten securely for strong, straight corners.

5. Plaster Application
Apply scratch coat, brown coat, and finish coat, pressing mortar firmly into the diamond openings to ensure full mechanical locking.

Material Comparison: Galvanized vs. Stainless Steel Lath Sheet

Galvanized expanded metal lath sheet is the most cost-effective choice for 90% of construction projects. For coastal, marine, or high-moisture environments, stainless steel lath sheet provides maximum corrosion resistance.

Why Choose Our Expanded Metal Lath Sheet

As a leading global manufacturer, we provide high-quality expanded metal lath sheet with unmatched value and reliability:

1. 20+ Years of Professional Manufacturing Experience
Since 2005, we have specialized in construction lath production with mature technology and strict quality control.

2. Advanced Production Equipment
Our Anping expanded metal factory uses automatic expanding and galvanizing lines for consistent, high-quality products.

3. Full Certification Compliance
All products meet ASTM, EN, and ISO international standards for global construction use.

4. Competitive Wholesale Pricing
As a bulk expanded metal mesh supplier, we offer factory-direct expanded metal mesh wholesale price for large orders.

5. Global Shipping & Export Support
We provide safe packaging and reliable shipping to ports worldwide, with full customs documentation.