What Is Expanded Metal Lathing 9EML?

9EML expanded metal lathing is a specialized construction grade expanded metal lath, defined by its unique diamond opening size, sheet thickness, and self-furring ribs. The “9EML” designation refers to its standard industrial specification for exterior plaster and stucco systems.

Unlike regular metal lath, 9EML features built-in ribs that create a uniform 1/4” gap behind the mesh, allowing plaster to fully encapsulate the lath for maximum mechanical bond. This design prevents cracking, hollow spots, and delamination in exterior walls.

It is the most widely used lath type for stucco, cement plaster, EIFS, and masonry wall reinforcement in the United States, Canada, and European construction markets.

Core Specifications of 9EML Expanded Metal Lathing

Expanded Metal Lathing 9EML follows strict dimensional standards for construction performance. Below are the official specifications:

All our 9EML products are manufactured to comply with ASTM C847, the international standard for metal lath used in plaster and stucco systems.

Key Advantages of 9EML Expanded Metal Lathing

9EML lath outperforms traditional wire mesh and thin lath products for exterior construction:

• Self-Furring Design: Built-in ribs ensure full plaster encapsulation
• Superior Bond Strength: Diamond openings lock cement plaster securely
• Corrosion Resistance: Hot-dip galvanized coating prevents rust
• Lightweight & Flexible: Easy to bend, cut, and install on curved walls
• High Tensile Strength: Resists wall cracking and structural movement
• Code Compliant: Meets ASTM C847 and international building codes
• Versatile: Works for interior plaster and exterior stucco systems

These benefits make 9EML the top choice for professional stucco contractors and construction teams worldwide.

Primary Applications of Expanded Metal Lathing 9EML

9EML expanded metal lathing is engineered for specific high-performance construction applications:

1. Exterior Stucco Wall Systems

The most common use: reinforcing exterior cement stucco walls for residential and commercial buildings.

2. EIFS (Exterior Insulation and Finish Systems)

Provides rigid reinforcement for insulated exterior wall panels in modern construction.

3. Interior Plaster & Drywall Reinforcement

Used for high-strength interior plaster walls, columns, and ceiling plaster bases.

4. Masonry & Concrete Repair

Repairs damaged concrete walls, bridges, and structural surfaces with cement overlay.

5. Curved Wall & Architectural Surfaces

Flexible enough to install on curved walls, arches, and custom architectural shapes.

Installation Best Practices for 9EML Lathing

Proper installation ensures maximum performance of 9EML expanded metal lathing:

1. Install vertically over wall studs or sheathing, with ribs facing outward
2. Overlap sheets 1” horizontally and 2” vertically for continuity
3. Secure with galvanized nails or screws every 6 inches on studs
4. Wrap corners tightly and reinforce with corner beads
5. Ensure 1/4” furring gap remains clear for plaster flow
6. Apply scratch coat, brown coat, and finish coat over lath

Our 9EML lath is designed for fast installation, reducing labor time and project costs.

9EML vs. Standard Expanded Metal Lath

Many users compare 9EML with regular lath products. Here is the key difference:

• 9EML Lathing: Self-furring ribs, precise 3/8"×1" diamond, 26ga galvanized, ASTM compliant, for exterior stucco
• Standard Lath: No furring ribs, variable sizes, for basic interior plaster use only

For exterior, high-quality stucco systems, 9EML is the only professional-grade choice.

Why Choose Our 9EML Expanded Metal Lathing?

With over 20 years of experience in metal mesh manufacturing, we are a trusted global supplier of 9EML lath:

• Strictly manufactured to 9EML official specifications
• Hot-dip galvanized for long-term corrosion resistance
• Self-furring ribs for perfect plaster bonding
• ASTM C847 certified for construction codes
• Factory-direct bulk pricing for contractors
• Fast shipping to North America, Europe, and worldwide
• Free samples and technical data sheets available

Our 9EML lath is used in thousands of successful construction projects every year.