High-Grade, Corrosion-Resistant Lath for Stucco: What It Is and Why It Matters
Written by the team at Stucco Champions — your trusted stucco experts in Southern California.
Behind every long-lasting stucco finish is a strong foundation. That starts with high-grade, corrosion-resistant lath — the metal framework that gives stucco its strength and bond.
This guide breaks down what corrosion-resistant lath is, why it matters, and how we install it right every time.
What Is Corrosion-Resistant Lath?
Lath is the metal mesh installed over your home’s sheathing or framing before the first layer of stucco is applied.
When we say corrosion-resistant lath, we’re referring to steel mesh that has been hot-dip galvanized or treated to resist moisture and rust.
This protective layer helps ensure your stucco system lasts for decades.
Why Lath Quality Matters
Not all metal lath is created equal. Cheap, low-grade mesh can rust behind your walls, crack the stucco surface, and lead to water intrusion.
At Stucco Champions, we only use premium-grade, code-compliant lath because it provides:
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Stronger bond to the scratch coat
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Corrosion protection in wet and coastal environments
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Durability over time — less cracking or structural shifting
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Compliance with building standards like ASTM C1063
We never cut corners. Every lath we install is selected based on your structure, climate, and long-term performance needs.
Types of Lath We Use
| Lath Type | Key Features |
|---|---|
| Hot-Dipped Galvanized | Extra rust protection — ideal for coastal homes |
| Self-Furred Metal Lath | Spacers built-in for airflow and bonding |
| Welded Wire Lath | Used for large commercial and structural walls |
You can learn more about lath’s role in our 3-coat stucco process to see where this critical material fits in.
How We Install It Right
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Wrap your structure with 2 layers of moisture barrier (building paper)
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Secure lath to studs or sheathing with approved fasteners
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Overlap joints by at least 1 inch
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Check for tight fit — no sagging or separation from the wall
Proper lath installation is the difference between stucco that lasts 50 years and stucco that fails in 5.
Where It Fits in the Stucco Process
High-grade lath is the first step in your full stucco system:
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Step 1: Scratch Coat – Bonds directly to the lath
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Step 2: Brown Coat – Builds structure and levels the surface
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Step 3: Finish Coat – Adds color and texture
Each layer depends on a strong foundation — which starts with the right lath.
FAQs
Does every home need corrosion-resistant lath?
Yes, especially in coastal or humid areas. Galvanized lath prevents rust and structural breakdown.
Is plastic lath ever acceptable?
Not for traditional stucco. Steel lath is required under most local building codes.
What codes apply to stucco lath?
We follow ASTM C1063 and all California building requirements for lath installation.
Final Takeaway
Your stucco is only as strong as the lath behind it. Choosing high-grade, corrosion-resistant lath ensures better adhesion, long-term durability, and peace of mind. At Stucco Champions, we never settle for subpar materials — and neither should you.
Ready to Simplify Your Stucco Work?
Contact Stucco Champions today for a free consultation!
Visit us at Stucco Champions for helpful resources and to learn more about our services.