Expanded Metal Diamond Lath: Complete Guide for Construction & Design
ANPING METAL MESH – Professional Metal Mesh Manufacturing Since 2005
Expanded metal diamond lath is the most widely used type of expanded metal lath, recognized by its uniform diamond-shaped openings that deliver superior bonding strength for plaster, stucco, concrete, and ceiling systems. It is a foundational material in modern construction and architectural design.
As a leading manufacturer in metal mesh manufacturing, we produce premium diamond-pattern expanded metal lath that meets ASTM, EN, and JIS international standards. Our products are trusted for building facades, ceiling plastering, wall reinforcement, and exterior stucco systems across 50+ countries worldwide.
What Is Expanded Metal Diamond Lath?
Expanded metal diamond lath is a construction-grade metal mesh made by slitting and stretching galvanized steel, aluminum, or stainless steel into consistent, repeating diamond openings. Unlike welded wire mesh, it is a single-piece structure with no break points, offering exceptional strength and flexibility.
The diamond pattern is the core design: it maximizes mechanical bonding with plaster, cement, and stucco, while allowing air circulation and material penetration. This design prevents wall cracking, hollow areas, and delamination over time.
It is used in both interior and exterior projects, ranging from residential homes to large commercial buildings, industrial facilities, and architectural designs.
Standard Specifications of Expanded Metal Diamond Lath
Our expanded metal diamond lath is manufactured with strict, consistent dimensions for reliable performance in all construction applications. Below are the industry-standard specifications:
| Parameter | Standard Value | Common Options |
|---|---|---|
| Material | Hot-Dip Galvanized Steel | Aluminum, 304 Stainless Steel |
| Diamond Opening (SWD × LWD) | 10mm × 20mm | 3/8" × 1" | 5×10mm, 15×30mm, 20×40mm |
| Sheet Thickness | 0.4mm – 0.5mm (26-28ga) | 0.6mm – 2.0mm (heavy duty) |
| Standard Sheet Size | 4' × 8' (1220×2440mm) | 27"×96", 5'×10', Custom |
| Surface Treatment | Hot-Dip Galvanized | Powder Coated, Polished, Anodized |
| Finish Type | Self-Furred / Flattened | Raised (non-slip) |
| International Standard | ASTM C847 | EN 10142, JIS G3302 |
All specifications are fully listed in our expanded metal mesh catalogue for quick reference and project planning.
Key Advantages of Expanded Metal Diamond Lath
The diamond-shaped design gives this lath unique performance benefits that make it irreplaceable in construction:
- Unmatched Bonding Strength: Diamond openings lock plaster and cement firmly in place
- One-Piece Structure: No welds, no breaks, high tensile strength
- Self-Furring Option: Built-in ribs ensure full plaster encapsulation
- Lightweight & Flexible: Easy to install on curved walls, arches, and columns
- Corrosion Resistant: Galvanized / stainless options for long-term durability
- Versatile: Works for interior, exterior, wet, and dry environments
- Cost-Effective: Low material cost + easy installation = lower project cost
- Fireproof & Non-Combustible: Safe for commercial and residential buildings
These advantages make expanded metal diamond lath the first choice for contractors, architects, and builders worldwide.
Main Applications of Expanded Metal Diamond Lath
Expanded metal diamond lath is used across nearly every construction and design category:
1. Exterior Stucco & Plaster Walls
The #1 application: reinforcing exterior cement stucco walls to prevent cracking and improve durability.
2. Expanded Metal Lath Ceiling Systems
Used as a base for plaster ceilings or as a decorative exposed expanded metal lath ceiling in industrial and modern designs.
3. Wall & Ceiling Plaster Reinforcement
Interior plaster walls, columns, and soffits rely on diamond lath for strength and stability.
4. Concrete & Masonry Repair
Repairs damaged concrete structures, bridges, floors, and walls with cement overlay.
5. Architectural Facades & Decor
Aluminum diamond lath is used for modern building facades, wall decor, and suspended ceiling designs.
6. 9EML Standard Lathing
Diamond lath is the base material for expanded metal lathing 9EML, the professional stucco lath standard.
Types of Expanded Metal Diamond Lath (By Material)
We offer three material types to match different environmental and budget needs:
1. Galvanized Steel Diamond Lath
Best For: Exterior stucco, general construction, basements, garages
Benefits: Affordable, rust-resistant, strong, code-compliant
2. Aluminum Diamond Lath
Best For: Indoor ceilings, architectural facades, decorative use, humid areas
Benefits: Ultra-lightweight, 100% rust-proof, modern appearance
3. Stainless Steel Diamond Lath
Best For: Commercial kitchens, pools, coastal areas, luxury projects
Benefits: Maximum corrosion resistance, hygienic, durable
Installation Guide for Expanded Metal Diamond Lath
Proper installation ensures long-lasting performance for diamond lath systems:
- Install lath vertically over wall studs or ceiling joists
- Overlap sheets 1–2 inches for continuous reinforcement
- Secure with galvanized screws or nails every 6 inches
- For self-furred lath: ensure ribs face outward for plaster flow
- Apply scratch coat, brown coat, and finish coat for stucco/plaster
- For decorative ceilings: mount in suspension grid system
Our diamond lath is designed for fast, straightforward installation to reduce labor time and costs.
FAQs: Expanded Metal Diamond Lath
What is the standard diamond size for construction lath?
Is diamond lath better than wire mesh?
Can diamond lath be used for outdoor ceilings?
What is self-furred diamond lath?
Does expanded metal diamond lath meet building codes?
Can I get custom sizes or colors?
Why Choose Our Expanded Metal Diamond Lath?
With more than 20 years in metal mesh manufacturing, we are a global leader in diamond lath production:
- Precision diamond opening for consistent bonding performance
- Full material options: galvanized, aluminum, stainless steel
- ASTM, EN, JIS certified for global construction codes
- Self-furred and flattened finish options available
- Factory-direct bulk pricing for contractors and distributors
- Fast worldwide shipping to 50+ countries
- Free samples, technical drawings, and catalogues available
Our diamond lath is used in thousands of successful construction projects every year.
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